Mercurial > hg > xmms-sid
annotate src/xs_curve.c @ 370:df6f12a00305
Work on filter curve widget begins, based on GtkCurve widget from Gtk+ 1.2.10.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Wed, 09 Nov 2005 05:52:01 +0000 |
parents | b1a858b8cb1a |
children | 58079c6180a0 |
rev | line source |
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358 | 1 /* GTK - The GIMP Toolkit |
2 * Copyright (C) 1997 David Mosberger | |
3 * | |
4 * This library is free software; you can redistribute it and/or | |
5 * modify it under the terms of the GNU Library General Public | |
6 * License as published by the Free Software Foundation; either | |
7 * version 2 of the License, or (at your option) any later version. | |
8 * | |
9 * This library is distributed in the hope that it will be useful, | |
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 * Library General Public License for more details. | |
13 * | |
14 * You should have received a copy of the GNU Library General Public | |
15 * License along with this library; if not, write to the | |
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
17 * Boston, MA 02111-1307, USA. | |
18 */ | |
19 | |
20 /* | |
21 * Modified by the GTK+ Team and others 1997-1999. See the AUTHORS | |
22 * file for a list of people on the GTK+ Team. See the ChangeLog | |
23 * files for a list of changes. These files are distributed with | |
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. | |
25 */ | |
26 | |
27 #include <stdlib.h> | |
28 #include <string.h> | |
29 #include <math.h> | |
30 | |
31 #include "xs_curve.h" | |
32 #include <gtk/gtkdrawingarea.h> | |
33 #include <gtk/gtkmain.h> | |
34 #include <gtk/gtksignal.h> | |
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35 |
358 | 36 |
37 #define RADIUS 3 /* radius of the control points */ | |
38 #define MIN_DISTANCE 8 /* min distance between control points */ | |
39 | |
40 #define GRAPH_MASK (GDK_EXPOSURE_MASK | \ | |
41 GDK_POINTER_MOTION_MASK | \ | |
42 GDK_POINTER_MOTION_HINT_MASK | \ | |
43 GDK_ENTER_NOTIFY_MASK | \ | |
44 GDK_BUTTON_PRESS_MASK | \ | |
45 GDK_BUTTON_RELEASE_MASK | \ | |
46 GDK_BUTTON1_MOTION_MASK) | |
47 | |
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48 enum |
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49 { |
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50 ARG_0, |
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51 ARG_CURVE_TYPE, |
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52 ARG_MIN_X, |
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53 ARG_MAX_X, |
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54 ARG_MIN_Y, |
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55 ARG_MAX_Y |
358 | 56 }; |
57 | |
58 static GtkDrawingAreaClass *parent_class = NULL; | |
59 static guint curve_type_changed_signal = 0; | |
60 | |
61 | |
62 /* forward declarations: */ | |
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63 static void xs_curve_class_init(XSCurveClass * class); |
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64 static void xs_curve_init(XSCurve * curve); |
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65 static void xs_curve_set_arg(GtkObject * object, GtkArg * arg, guint arg_id); |
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66 static void xs_curve_get_arg(GtkObject * object, GtkArg * arg, guint arg_id); |
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67 static void xs_curve_finalize(GtkObject * object); |
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68 static gint xs_curve_graph_events(GtkWidget * widget, GdkEvent * event, XSCurve * c); |
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69 static void xs_curve_size_graph(XSCurve * curve); |
358 | 70 |
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71 GtkType xs_curve_get_type(void) |
358 | 72 { |
359
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73 static GtkType curve_type = 0; |
358 | 74 |
359
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75 if (!curve_type) { |
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76 static const GtkTypeInfo curve_info = { |
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77 "XSCurve", |
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78 sizeof(XSCurve), |
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79 sizeof(XSCurveClass), |
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80 (GtkClassInitFunc) xs_curve_class_init, |
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81 (GtkObjectInitFunc) xs_curve_init, |
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82 /* reserved_1 */ NULL, |
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83 /* reserved_2 */ NULL, |
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84 (GtkClassInitFunc) NULL, |
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85 }; |
358 | 86 |
359
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87 curve_type = gtk_type_unique(GTK_TYPE_DRAWING_AREA, &curve_info); |
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88 } |
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89 return curve_type; |
358 | 90 } |
91 | |
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92 static void xs_curve_class_init(XSCurveClass * class) |
358 | 93 { |
359
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94 GtkObjectClass *object_class; |
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95 |
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96 parent_class = gtk_type_class(GTK_TYPE_DRAWING_AREA); |
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97 |
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98 object_class = (GtkObjectClass *) class; |
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99 |
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100 object_class->set_arg = xs_curve_set_arg; |
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101 object_class->get_arg = xs_curve_get_arg; |
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102 object_class->finalize = xs_curve_finalize; |
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103 |
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104 curve_type_changed_signal = |
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105 gtk_signal_new("curve_type_changed", GTK_RUN_FIRST, object_class->type, |
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106 GTK_SIGNAL_OFFSET(XSCurveClass, curve_type_changed), |
359
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107 gtk_marshal_NONE__NONE, GTK_TYPE_NONE, 0); |
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108 gtk_object_class_add_signals(object_class, &curve_type_changed_signal, 1); |
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109 |
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110 gtk_object_add_arg_type("XSCurve::curve_type", GTK_TYPE_CURVE_TYPE, GTK_ARG_READWRITE, ARG_CURVE_TYPE); |
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111 gtk_object_add_arg_type("XSCurve::min_x", GTK_TYPE_FLOAT, GTK_ARG_READWRITE, ARG_MIN_X); |
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112 gtk_object_add_arg_type("XSCurve::max_x", GTK_TYPE_FLOAT, GTK_ARG_READWRITE, ARG_MAX_X); |
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113 gtk_object_add_arg_type("XSCurve::min_y", GTK_TYPE_FLOAT, GTK_ARG_READWRITE, ARG_MIN_Y); |
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114 gtk_object_add_arg_type("XSCurve::max_y", GTK_TYPE_FLOAT, GTK_ARG_READWRITE, ARG_MAX_Y); |
358 | 115 } |
116 | |
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117 static void xs_curve_init(XSCurve * curve) |
358 | 118 { |
359
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119 gint old_mask; |
358 | 120 |
359
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121 curve->cursor_type = GDK_TOP_LEFT_ARROW; |
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122 curve->pixmap = NULL; |
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123 curve->curve_type = GTK_CURVE_TYPE_SPLINE; |
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124 curve->height = 0; |
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125 curve->grab_point = -1; |
358 | 126 |
359
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127 curve->num_points = 0; |
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128 curve->point = 0; |
358 | 129 |
359
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130 curve->num_ctlpoints = 0; |
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131 curve->ctlpoint = NULL; |
358 | 132 |
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133 curve->min_x = 0.0; |
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134 curve->max_x = 1.0; |
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135 curve->min_y = 0.0; |
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136 curve->max_y = 1.0; |
358 | 137 |
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138 old_mask = gtk_widget_get_events(GTK_WIDGET(curve)); |
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139 gtk_widget_set_events(GTK_WIDGET(curve), old_mask | GRAPH_MASK); |
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140 gtk_signal_connect(GTK_OBJECT(curve), "event", (GtkSignalFunc) xs_curve_graph_events, curve); |
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141 xs_curve_size_graph(curve); |
358 | 142 } |
143 | |
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144 static void xs_curve_set_arg(GtkObject * object, GtkArg * arg, guint arg_id) |
358 | 145 { |
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146 XSCurve *curve = XS_CURVE(object); |
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147 |
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148 switch (arg_id) { |
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149 case ARG_CURVE_TYPE: |
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150 xs_curve_set_curve_type(curve, GTK_VALUE_ENUM(*arg)); |
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151 break; |
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152 case ARG_MIN_X: |
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153 xs_curve_set_range(curve, GTK_VALUE_FLOAT(*arg), curve->max_x, curve->min_y, curve->max_y); |
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154 break; |
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155 case ARG_MAX_X: |
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156 xs_curve_set_range(curve, curve->min_x, GTK_VALUE_FLOAT(*arg), curve->min_y, curve->max_y); |
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157 break; |
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158 case ARG_MIN_Y: |
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159 xs_curve_set_range(curve, curve->min_x, curve->max_x, GTK_VALUE_FLOAT(*arg), curve->max_y); |
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160 break; |
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161 case ARG_MAX_Y: |
370
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162 xs_curve_set_range(curve, curve->min_x, curve->max_x, curve->min_y, GTK_VALUE_FLOAT(*arg)); |
359
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163 break; |
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164 } |
358 | 165 } |
166 | |
370
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167 static void xs_curve_get_arg(GtkObject * object, GtkArg * arg, guint arg_id) |
358 | 168 { |
370
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169 XSCurve *curve = XS_CURVE(object); |
358 | 170 |
359
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171 switch (arg_id) { |
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172 case ARG_CURVE_TYPE: |
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173 GTK_VALUE_ENUM(*arg) = curve->curve_type; |
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174 break; |
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175 case ARG_MIN_X: |
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176 GTK_VALUE_FLOAT(*arg) = curve->min_x; |
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177 break; |
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178 case ARG_MAX_X: |
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179 GTK_VALUE_FLOAT(*arg) = curve->max_x; |
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180 break; |
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181 case ARG_MIN_Y: |
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182 GTK_VALUE_FLOAT(*arg) = curve->min_y; |
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183 break; |
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184 case ARG_MAX_Y: |
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185 GTK_VALUE_FLOAT(*arg) = curve->max_y; |
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186 break; |
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187 default: |
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188 arg->type = GTK_TYPE_INVALID; |
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189 break; |
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190 } |
358 | 191 } |
192 | |
359
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193 static int project(gfloat value, gfloat min, gfloat max, int norm) |
358 | 194 { |
359
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195 return (norm - 1) * ((value - min) / (max - min)) + 0.5; |
358 | 196 } |
197 | |
359
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198 static gfloat unproject(gint value, gfloat min, gfloat max, int norm) |
358 | 199 { |
359
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200 return value / (gfloat) (norm - 1) * (max - min) + min; |
358 | 201 } |
202 | |
203 /* Solve the tridiagonal equation system that determines the second | |
204 derivatives for the interpolation points. (Based on Numerical | |
205 Recipies 2nd Edition.) */ | |
359
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206 static void spline_solve(int n, gfloat x[], gfloat y[], gfloat y2[]) |
358 | 207 { |
359
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208 gfloat p, sig, *u; |
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209 gint i, k; |
358 | 210 |
359
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211 u = g_malloc((n - 1) * sizeof(u[0])); |
358 | 212 |
359
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213 y2[0] = u[0] = 0.0; /* set lower boundary condition to "natural" */ |
358 | 214 |
359
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215 for (i = 1; i < n - 1; ++i) { |
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216 sig = (x[i] - x[i - 1]) / (x[i + 1] - x[i - 1]); |
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217 p = sig * y2[i - 1] + 2.0; |
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218 y2[i] = (sig - 1.0) / p; |
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219 u[i] = ((y[i + 1] - y[i]) |
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220 / (x[i + 1] - x[i]) - (y[i] - y[i - 1]) / (x[i] - x[i - 1])); |
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221 u[i] = (6.0 * u[i] / (x[i + 1] - x[i - 1]) - sig * u[i - 1]) / p; |
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222 } |
358 | 223 |
359
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224 y2[n - 1] = 0.0; |
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225 for (k = n - 2; k >= 0; --k) |
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226 y2[k] = y2[k] * y2[k + 1] + u[k]; |
358 | 227 |
359
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228 g_free(u); |
358 | 229 } |
230 | |
359
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231 static gfloat spline_eval(int n, gfloat x[], gfloat y[], gfloat y2[], gfloat val) |
358 | 232 { |
359
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233 gint k_lo, k_hi, k; |
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234 gfloat h, b, a; |
358 | 235 |
359
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236 /* do a binary search for the right interval: */ |
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237 k_lo = 0; |
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238 k_hi = n - 1; |
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239 while (k_hi - k_lo > 1) { |
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240 k = (k_hi + k_lo) / 2; |
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241 if (x[k] > val) |
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242 k_hi = k; |
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243 else |
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244 k_lo = k; |
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245 } |
358 | 246 |
359
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247 h = x[k_hi] - x[k_lo]; |
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248 g_assert(h > 0.0); |
358 | 249 |
359
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250 a = (x[k_hi] - val) / h; |
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251 b = (val - x[k_lo]) / h; |
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252 return a * y[k_lo] + b * y[k_hi] + ((a * a * a - a) * y2[k_lo] + (b * b * b - b) * y2[k_hi]) * (h * h) / 6.0; |
358 | 253 } |
254 | |
370
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255 static void xs_curve_interpolate(XSCurve * c, gint width, gint height) |
358 | 256 { |
359
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257 gfloat *vector; |
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258 int i; |
358 | 259 |
359
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260 vector = g_malloc(width * sizeof(vector[0])); |
358 | 261 |
370
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262 xs_curve_get_vector(c, width, vector); |
358 | 263 |
359
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264 c->height = height; |
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265 if (c->num_points != width) { |
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266 c->num_points = width; |
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267 if (c->point) |
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268 g_free(c->point); |
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269 c->point = g_malloc(c->num_points * sizeof(c->point[0])); |
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270 } |
358 | 271 |
359
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272 for (i = 0; i < width; ++i) { |
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273 c->point[i].x = RADIUS + i; |
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274 c->point[i].y = RADIUS + height - project(vector[i], c->min_y, c->max_y, height); |
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275 } |
358 | 276 |
359
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277 g_free(vector); |
358 | 278 } |
279 | |
370
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280 static void xs_curve_draw(XSCurve * c, gint width, gint height) |
358 | 281 { |
359
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282 GtkStateType state; |
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283 GtkStyle *style; |
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284 gint i; |
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285 |
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286 if (!c->pixmap) |
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287 return; |
358 | 288 |
359
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289 if (c->height != height || c->num_points != width) |
370
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290 xs_curve_interpolate(c, width, height); |
358 | 291 |
359
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292 state = GTK_STATE_NORMAL; |
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293 if (!GTK_WIDGET_IS_SENSITIVE(GTK_WIDGET(c))) |
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294 state = GTK_STATE_INSENSITIVE; |
358 | 295 |
359
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296 style = GTK_WIDGET(c)->style; |
358 | 297 |
359
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298 /* clear the pixmap: */ |
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299 gtk_paint_flat_box(style, c->pixmap, GTK_STATE_NORMAL, GTK_SHADOW_NONE, |
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300 NULL, GTK_WIDGET(c), "curve_bg", 0, 0, width + RADIUS * 2, height + RADIUS * 2); |
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301 /* draw the grid lines: (XXX make more meaningful) */ |
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302 for (i = 0; i < 5; i++) { |
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303 gdk_draw_line(c->pixmap, style->dark_gc[state], |
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304 RADIUS, i * (height / 4.0) + RADIUS, width + RADIUS, i * (height / 4.0) + RADIUS); |
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305 gdk_draw_line(c->pixmap, style->dark_gc[state], |
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306 i * (width / 4.0) + RADIUS, RADIUS, i * (width / 4.0) + RADIUS, height + RADIUS); |
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307 } |
358 | 308 |
359
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309 gdk_draw_points(c->pixmap, style->fg_gc[state], c->point, c->num_points); |
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310 if (c->curve_type != GTK_CURVE_TYPE_FREE) |
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311 for (i = 0; i < c->num_ctlpoints; ++i) { |
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312 gint x, y; |
358 | 313 |
359
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314 if (c->ctlpoint[i][0] < c->min_x) |
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315 continue; |
358 | 316 |
359
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317 x = project(c->ctlpoint[i][0], c->min_x, c->max_x, width); |
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318 y = height - project(c->ctlpoint[i][1], c->min_y, c->max_y, height); |
358 | 319 |
359
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320 /* draw a bullet: */ |
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321 gdk_draw_arc(c->pixmap, style->fg_gc[state], TRUE, x, y, RADIUS * 2, RADIUS * 2, 0, 360 * 64); |
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322 } |
370
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323 |
359
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324 gdk_draw_pixmap(GTK_WIDGET(c)->window, style->fg_gc[state], c->pixmap, |
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325 0, 0, 0, 0, width + RADIUS * 2, height + RADIUS * 2); |
358 | 326 } |
327 | |
370
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328 static gint xs_curve_graph_events(GtkWidget * widget, GdkEvent * event, XSCurve * c) |
358 | 329 { |
359
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330 GdkCursorType new_type = c->cursor_type; |
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331 gint i, src, dst, leftbound, rightbound; |
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332 GdkEventButton *bevent; |
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333 GdkEventMotion *mevent; |
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334 GtkWidget *w; |
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335 gint tx, ty; |
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336 gint cx, x, y, width, height; |
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337 gint closest_point = 0; |
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338 gfloat rx, ry, min_x; |
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339 guint distance; |
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340 gint x1, x2, y1, y2; |
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341 |
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342 w = GTK_WIDGET(c); |
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343 width = w->allocation.width - RADIUS * 2; |
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344 height = w->allocation.height - RADIUS * 2; |
358 | 345 |
359
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346 if ((width < 0) || (height < 0)) |
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347 return FALSE; |
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348 |
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349 /* get the pointer position */ |
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350 gdk_window_get_pointer(w->window, &tx, &ty, NULL); |
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351 x = CLAMP((tx - RADIUS), 0, width - 1); |
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352 y = CLAMP((ty - RADIUS), 0, height - 1); |
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353 |
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354 min_x = c->min_x; |
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355 |
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356 distance = ~0U; |
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357 for (i = 0; i < c->num_ctlpoints; ++i) { |
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358 cx = project(c->ctlpoint[i][0], min_x, c->max_x, width); |
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359 if ((guint) abs(x - cx) < distance) { |
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360 distance = abs(x - cx); |
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361 closest_point = i; |
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362 } |
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363 } |
358 | 364 |
359
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365 switch (event->type) { |
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366 case GDK_CONFIGURE: |
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367 if (c->pixmap) |
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368 gdk_pixmap_unref(c->pixmap); |
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369 c->pixmap = 0; |
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370 /* fall through */ |
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371 case GDK_EXPOSE: |
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372 if (!c->pixmap) |
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373 c->pixmap = gdk_pixmap_new(w->window, w->allocation.width, w->allocation.height, -1); |
370
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374 xs_curve_draw(c, width, height); |
359
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375 break; |
358 | 376 |
359
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377 case GDK_BUTTON_PRESS: |
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378 gtk_grab_add(widget); |
358 | 379 |
359
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380 bevent = (GdkEventButton *) event; |
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381 new_type = GDK_TCROSS; |
358 | 382 |
359
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383 switch (c->curve_type) { |
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384 case GTK_CURVE_TYPE_LINEAR: |
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385 case GTK_CURVE_TYPE_SPLINE: |
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386 if (distance > MIN_DISTANCE) { |
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387 /* insert a new control point */ |
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388 if (c->num_ctlpoints > 0) { |
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389 cx = project(c->ctlpoint[closest_point][0], min_x, c->max_x, width); |
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390 if (x > cx) |
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391 ++closest_point; |
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392 } |
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393 ++c->num_ctlpoints; |
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394 c->ctlpoint = g_realloc(c->ctlpoint, c->num_ctlpoints * sizeof(*c->ctlpoint)); |
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395 for (i = c->num_ctlpoints - 1; i > closest_point; --i) |
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396 memcpy(c->ctlpoint + i, c->ctlpoint + i - 1, sizeof(*c->ctlpoint)); |
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397 } |
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398 c->grab_point = closest_point; |
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399 c->ctlpoint[c->grab_point][0] = unproject(x, min_x, c->max_x, width); |
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400 c->ctlpoint[c->grab_point][1] = unproject(height - y, c->min_y, c->max_y, height); |
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401 |
370
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402 xs_curve_interpolate(c, width, height); |
359
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403 break; |
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404 |
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405 case GTK_CURVE_TYPE_FREE: |
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406 c->point[x].x = RADIUS + x; |
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407 c->point[x].y = RADIUS + y; |
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408 c->grab_point = x; |
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409 c->last = y; |
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410 break; |
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411 } |
370
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412 xs_curve_draw(c, width, height); |
359
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413 break; |
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|
414 |
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415 case GDK_BUTTON_RELEASE: |
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416 gtk_grab_remove(widget); |
358 | 417 |
359
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418 /* delete inactive points: */ |
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419 if (c->curve_type != GTK_CURVE_TYPE_FREE) { |
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420 for (src = dst = 0; src < c->num_ctlpoints; ++src) { |
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421 if (c->ctlpoint[src][0] >= min_x) { |
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422 memcpy(c->ctlpoint + dst, c->ctlpoint + src, sizeof(*c->ctlpoint)); |
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423 ++dst; |
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424 } |
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|
425 } |
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426 if (dst < src) { |
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427 c->num_ctlpoints -= (src - dst); |
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428 if (c->num_ctlpoints <= 0) { |
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429 c->num_ctlpoints = 1; |
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|
430 c->ctlpoint[0][0] = min_x; |
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431 c->ctlpoint[0][1] = c->min_y; |
370
df6f12a00305
Work on filter curve widget begins, based on GtkCurve widget from Gtk+ 1.2.10.
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|
432 xs_curve_interpolate(c, width, height); |
df6f12a00305
Work on filter curve widget begins, based on GtkCurve widget from Gtk+ 1.2.10.
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|
433 xs_curve_draw(c, width, height); |
359
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|
434 } |
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|
435 c->ctlpoint = g_realloc(c->ctlpoint, c->num_ctlpoints * sizeof(*c->ctlpoint)); |
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|
436 } |
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|
437 } |
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|
438 new_type = GDK_FLEUR; |
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439 c->grab_point = -1; |
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|
440 break; |
358 | 441 |
359
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|
442 case GDK_MOTION_NOTIFY: |
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443 mevent = (GdkEventMotion *) event; |
358 | 444 |
359
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445 switch (c->curve_type) { |
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446 case GTK_CURVE_TYPE_LINEAR: |
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447 case GTK_CURVE_TYPE_SPLINE: |
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448 if (c->grab_point == -1) { |
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449 /* if no point is grabbed... */ |
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450 if (distance <= MIN_DISTANCE) |
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451 new_type = GDK_FLEUR; |
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452 else |
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453 new_type = GDK_TCROSS; |
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454 } else { |
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455 /* drag the grabbed point */ |
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456 new_type = GDK_TCROSS; |
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457 |
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458 leftbound = -MIN_DISTANCE; |
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459 if (c->grab_point > 0) |
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460 leftbound = project(c->ctlpoint[c->grab_point - 1][0], min_x, c->max_x, width); |
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461 |
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462 rightbound = width + RADIUS * 2 + MIN_DISTANCE; |
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463 if (c->grab_point + 1 < c->num_ctlpoints) |
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464 rightbound = project(c->ctlpoint[c->grab_point + 1][0], min_x, c->max_x, width); |
358 | 465 |
359
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466 if (tx <= leftbound || tx >= rightbound |
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467 || ty > height + RADIUS * 2 + MIN_DISTANCE || ty < -MIN_DISTANCE) |
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468 c->ctlpoint[c->grab_point][0] = min_x - 1.0; |
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469 else { |
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|
470 rx = unproject(x, min_x, c->max_x, width); |
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471 ry = unproject(height - y, c->min_y, c->max_y, height); |
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472 c->ctlpoint[c->grab_point][0] = rx; |
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473 c->ctlpoint[c->grab_point][1] = ry; |
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474 } |
370
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Work on filter curve widget begins, based on GtkCurve widget from Gtk+ 1.2.10.
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|
475 xs_curve_interpolate(c, width, height); |
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Work on filter curve widget begins, based on GtkCurve widget from Gtk+ 1.2.10.
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changeset
|
476 xs_curve_draw(c, width, height); |
359
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|
477 } |
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changeset
|
478 break; |
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|
479 |
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|
480 case GTK_CURVE_TYPE_FREE: |
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481 if (c->grab_point != -1) { |
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|
482 if (c->grab_point > x) { |
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changeset
|
483 x1 = x; |
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|
484 x2 = c->grab_point; |
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|
485 y1 = y; |
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|
486 y2 = c->last; |
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|
487 } else { |
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|
488 x1 = c->grab_point; |
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489 x2 = x; |
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|
490 y1 = c->last; |
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|
491 y2 = y; |
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changeset
|
492 } |
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diff
changeset
|
493 |
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diff
changeset
|
494 if (x2 != x1) |
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changeset
|
495 for (i = x1; i <= x2; i++) { |
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|
496 c->point[i].x = RADIUS + i; |
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|
497 c->point[i].y = RADIUS + (y1 + ((y2 - y1) * (i - x1)) / (x2 - x1)); |
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Re-indentation all (non-generated) code.
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changeset
|
498 } else { |
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changeset
|
499 c->point[x].x = RADIUS + x; |
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changeset
|
500 c->point[x].y = RADIUS + y; |
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|
501 } |
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|
502 c->grab_point = x; |
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|
503 c->last = y; |
370
df6f12a00305
Work on filter curve widget begins, based on GtkCurve widget from Gtk+ 1.2.10.
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parents:
359
diff
changeset
|
504 xs_curve_draw(c, width, height); |
359
b1a858b8cb1a
Re-indentation all (non-generated) code.
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358
diff
changeset
|
505 } |
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diff
changeset
|
506 if (mevent->state & GDK_BUTTON1_MASK) |
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|
507 new_type = GDK_TCROSS; |
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changeset
|
508 else |
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diff
changeset
|
509 new_type = GDK_PENCIL; |
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Re-indentation all (non-generated) code.
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changeset
|
510 break; |
358 | 511 } |
359
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diff
changeset
|
512 if (new_type != (GdkCursorType) c->cursor_type) { |
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changeset
|
513 GdkCursor *cursor; |
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|
514 |
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diff
changeset
|
515 c->cursor_type = new_type; |
358 | 516 |
359
b1a858b8cb1a
Re-indentation all (non-generated) code.
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diff
changeset
|
517 cursor = gdk_cursor_new(c->cursor_type); |
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Re-indentation all (non-generated) code.
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diff
changeset
|
518 gdk_window_set_cursor(w->window, cursor); |
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diff
changeset
|
519 gdk_cursor_destroy(cursor); |
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Re-indentation all (non-generated) code.
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diff
changeset
|
520 } |
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Re-indentation all (non-generated) code.
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358
diff
changeset
|
521 break; |
358 | 522 |
359
b1a858b8cb1a
Re-indentation all (non-generated) code.
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358
diff
changeset
|
523 default: |
b1a858b8cb1a
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diff
changeset
|
524 break; |
358 | 525 } |
359
b1a858b8cb1a
Re-indentation all (non-generated) code.
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diff
changeset
|
526 return FALSE; |
b1a858b8cb1a
Re-indentation all (non-generated) code.
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diff
changeset
|
527 } |
358 | 528 |
370
df6f12a00305
Work on filter curve widget begins, based on GtkCurve widget from Gtk+ 1.2.10.
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parents:
359
diff
changeset
|
529 void xs_curve_set_curve_type(XSCurve * c, GtkCurveType new_type) |
359
b1a858b8cb1a
Re-indentation all (non-generated) code.
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diff
changeset
|
530 { |
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Re-indentation all (non-generated) code.
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diff
changeset
|
531 gfloat rx, dx; |
b1a858b8cb1a
Re-indentation all (non-generated) code.
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changeset
|
532 gint x, i; |
b1a858b8cb1a
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diff
changeset
|
533 |
b1a858b8cb1a
Re-indentation all (non-generated) code.
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diff
changeset
|
534 if (new_type != c->curve_type) { |
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changeset
|
535 gint width, height; |
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diff
changeset
|
536 |
b1a858b8cb1a
Re-indentation all (non-generated) code.
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diff
changeset
|
537 width = GTK_WIDGET(c)->allocation.width - RADIUS * 2; |
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Re-indentation all (non-generated) code.
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diff
changeset
|
538 height = GTK_WIDGET(c)->allocation.height - RADIUS * 2; |
358 | 539 |
359
b1a858b8cb1a
Re-indentation all (non-generated) code.
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diff
changeset
|
540 if (new_type == GTK_CURVE_TYPE_FREE) { |
370
df6f12a00305
Work on filter curve widget begins, based on GtkCurve widget from Gtk+ 1.2.10.
Matti Hamalainen <ccr@tnsp.org>
parents:
359
diff
changeset
|
541 xs_curve_interpolate(c, width, height); |
359
b1a858b8cb1a
Re-indentation all (non-generated) code.
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diff
changeset
|
542 c->curve_type = new_type; |
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Re-indentation all (non-generated) code.
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diff
changeset
|
543 } else if (c->curve_type == GTK_CURVE_TYPE_FREE) { |
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Re-indentation all (non-generated) code.
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diff
changeset
|
544 if (c->ctlpoint) |
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Re-indentation all (non-generated) code.
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diff
changeset
|
545 g_free(c->ctlpoint); |
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546 c->num_ctlpoints = 9; |
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547 c->ctlpoint = g_malloc(c->num_ctlpoints * sizeof(*c->ctlpoint)); |
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548 |
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549 rx = 0.0; |
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550 dx = (width - 1) / (gfloat) (c->num_ctlpoints - 1); |
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|
551 |
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552 for (i = 0; i < c->num_ctlpoints; ++i, rx += dx) { |
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553 x = (int) (rx + 0.5); |
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554 c->ctlpoint[i][0] = unproject(x, c->min_x, c->max_x, width); |
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555 c->ctlpoint[i][1] = |
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556 unproject(RADIUS + height - c->point[x].y, c->min_y, c->max_y, height); |
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557 } |
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558 c->curve_type = new_type; |
370
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559 xs_curve_interpolate(c, width, height); |
359
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560 } else { |
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561 c->curve_type = new_type; |
370
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562 xs_curve_interpolate(c, width, height); |
358 | 563 } |
359
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564 gtk_signal_emit(GTK_OBJECT(c), curve_type_changed_signal); |
370
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565 xs_curve_draw(c, width, height); |
359
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566 } |
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|
567 } |
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|
568 |
370
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569 static void xs_curve_size_graph(XSCurve * curve) |
359
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570 { |
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571 gint width, height; |
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572 gfloat aspect; |
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573 |
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574 width = (curve->max_x - curve->min_x) + 1; |
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575 height = (curve->max_y - curve->min_y) + 1; |
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576 aspect = width / (gfloat) height; |
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577 if (width > gdk_screen_width() / 4) |
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578 width = gdk_screen_width() / 4; |
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579 if (height > gdk_screen_height() / 4) |
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580 height = gdk_screen_height() / 4; |
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581 |
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582 if (aspect < 1.0) |
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583 width = height * aspect; |
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584 else |
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585 height = width / aspect; |
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|
586 |
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587 gtk_drawing_area_size(GTK_DRAWING_AREA(curve), width + RADIUS * 2, height + RADIUS * 2); |
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|
588 } |
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589 |
370
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590 static void xs_curve_reset_vector(XSCurve * curve) |
359
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591 { |
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|
592 if (curve->ctlpoint) |
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593 g_free(curve->ctlpoint); |
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|
594 |
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595 curve->num_ctlpoints = 2; |
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596 curve->ctlpoint = g_malloc(2 * sizeof(curve->ctlpoint[0])); |
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597 curve->ctlpoint[0][0] = curve->min_x; |
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598 curve->ctlpoint[0][1] = curve->min_y; |
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|
599 curve->ctlpoint[1][0] = curve->max_x; |
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|
600 curve->ctlpoint[1][1] = curve->max_y; |
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|
601 |
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changeset
|
602 if (curve->pixmap) { |
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603 gint width, height; |
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|
604 |
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|
605 width = GTK_WIDGET(curve)->allocation.width - RADIUS * 2; |
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|
606 height = GTK_WIDGET(curve)->allocation.height - RADIUS * 2; |
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|
607 |
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|
608 if (curve->curve_type == GTK_CURVE_TYPE_FREE) { |
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609 curve->curve_type = GTK_CURVE_TYPE_LINEAR; |
370
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|
610 xs_curve_interpolate(curve, width, height); |
359
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|
611 curve->curve_type = GTK_CURVE_TYPE_FREE; |
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612 } else |
370
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|
613 xs_curve_interpolate(curve, width, height); |
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Work on filter curve widget begins, based on GtkCurve widget from Gtk+ 1.2.10.
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|
614 xs_curve_draw(curve, width, height); |
359
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|
615 } |
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|
616 } |
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|
617 |
370
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Work on filter curve widget begins, based on GtkCurve widget from Gtk+ 1.2.10.
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|
618 void xs_curve_reset(XSCurve * c) |
359
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|
619 { |
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|
620 GtkCurveType old_type; |
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|
621 |
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622 old_type = c->curve_type; |
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623 c->curve_type = GTK_CURVE_TYPE_SPLINE; |
370
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|
624 xs_curve_reset_vector(c); |
359
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|
625 |
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626 if (old_type != GTK_CURVE_TYPE_SPLINE) |
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627 gtk_signal_emit(GTK_OBJECT(c), curve_type_changed_signal); |
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|
628 } |
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|
629 |
370
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|
630 void xs_curve_set_gamma(XSCurve * c, gfloat gamma) |
359
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|
631 { |
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|
632 gfloat x, one_over_gamma, height, one_over_width; |
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633 GtkCurveType old_type; |
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634 gint i; |
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|
635 |
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|
636 if (c->num_points < 2) |
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|
637 return; |
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|
638 |
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|
639 old_type = c->curve_type; |
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640 c->curve_type = GTK_CURVE_TYPE_FREE; |
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|
641 |
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|
642 if (gamma <= 0) |
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643 one_over_gamma = 1.0; |
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|
644 else |
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645 one_over_gamma = 1.0 / gamma; |
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646 one_over_width = 1.0 / (c->num_points - 1); |
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647 height = c->height; |
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648 for (i = 0; i < c->num_points; ++i) { |
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649 x = (gfloat) i / (c->num_points - 1); |
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650 c->point[i].x = RADIUS + i; |
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|
651 c->point[i].y = RADIUS + (height * (1.0 - pow(x, one_over_gamma)) + 0.5); |
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|
652 } |
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|
653 |
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|
654 if (old_type != GTK_CURVE_TYPE_FREE) |
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655 gtk_signal_emit(GTK_OBJECT(c), curve_type_changed_signal); |
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|
656 |
370
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Work on filter curve widget begins, based on GtkCurve widget from Gtk+ 1.2.10.
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|
657 xs_curve_draw(c, c->num_points, c->height); |
359
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658 } |
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659 |
370
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660 void xs_curve_set_range(XSCurve * curve, gfloat min_x, gfloat max_x, gfloat min_y, gfloat max_y) |
359
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661 { |
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662 curve->min_x = min_x; |
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663 curve->max_x = max_x; |
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664 curve->min_y = min_y; |
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665 curve->max_y = max_y; |
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666 |
370
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667 xs_curve_size_graph(curve); |
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668 xs_curve_reset_vector(curve); |
359
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669 } |
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670 |
370
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671 void xs_curve_set_vector(XSCurve * c, int veclen, gfloat vector[]) |
359
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672 { |
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673 GtkCurveType old_type; |
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674 gfloat rx, dx, ry; |
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675 gint i, height; |
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676 |
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677 old_type = c->curve_type; |
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678 c->curve_type = GTK_CURVE_TYPE_FREE; |
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679 |
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680 if (c->point) |
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681 height = GTK_WIDGET(c)->allocation.height - RADIUS * 2; |
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682 else { |
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683 height = (c->max_y - c->min_y); |
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684 if (height > gdk_screen_height() / 4) |
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685 height = gdk_screen_height() / 4; |
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686 |
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687 c->height = height; |
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688 c->num_points = veclen; |
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689 c->point = g_malloc(c->num_points * sizeof(c->point[0])); |
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|
690 } |
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691 rx = 0; |
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692 dx = (veclen - 1.0) / (c->num_points - 1.0); |
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693 |
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694 for (i = 0; i < c->num_points; ++i, rx += dx) { |
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695 ry = vector[(int) (rx + 0.5)]; |
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696 if (ry > c->max_y) |
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697 ry = c->max_y; |
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698 if (ry < c->min_y) |
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699 ry = c->min_y; |
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|
700 c->point[i].x = RADIUS + i; |
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701 c->point[i].y = RADIUS + height - project(ry, c->min_y, c->max_y, height); |
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702 } |
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|
703 if (old_type != GTK_CURVE_TYPE_FREE) |
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704 gtk_signal_emit(GTK_OBJECT(c), curve_type_changed_signal); |
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|
705 |
370
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|
706 xs_curve_draw(c, c->num_points, height); |
359
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|
707 } |
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|
708 |
370
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|
709 void xs_curve_get_vector(XSCurve * c, int veclen, gfloat vector[]) |
359
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|
710 { |
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|
711 gfloat rx, ry, dx, dy, min_x, delta_x, *mem, *xv, *yv, *y2v, prev; |
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712 gint dst, i, x, next, num_active_ctlpoints = 0, first_active = -1; |
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|
713 |
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|
714 min_x = c->min_x; |
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Re-indentation all (non-generated) code.
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|
715 |
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Re-indentation all (non-generated) code.
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|
716 if (c->curve_type != GTK_CURVE_TYPE_FREE) { |
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717 /* count active points: */ |
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|
718 prev = min_x - 1.0; |
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|
719 for (i = num_active_ctlpoints = 0; i < c->num_ctlpoints; ++i) |
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diff
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|
720 if (c->ctlpoint[i][0] > prev) { |
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|
721 if (first_active < 0) |
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|
722 first_active = i; |
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723 prev = c->ctlpoint[i][0]; |
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|
724 ++num_active_ctlpoints; |
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diff
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|
725 } |
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Re-indentation all (non-generated) code.
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diff
changeset
|
726 |
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diff
changeset
|
727 /* handle degenerate case: */ |
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|
728 if (num_active_ctlpoints < 2) { |
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|
729 if (num_active_ctlpoints > 0) |
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|
730 ry = c->ctlpoint[first_active][1]; |
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diff
changeset
|
731 else |
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changeset
|
732 ry = c->min_y; |
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|
733 if (ry < c->min_y) |
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|
734 ry = c->min_y; |
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|
735 if (ry > c->max_y) |
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|
736 ry = c->max_y; |
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|
737 for (x = 0; x < veclen; ++x) |
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changeset
|
738 vector[x] = ry; |
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|
739 return; |
358 | 740 } |
741 } | |
742 | |
359
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Re-indentation all (non-generated) code.
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diff
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|
743 switch (c->curve_type) { |
358 | 744 case GTK_CURVE_TYPE_SPLINE: |
359
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|
745 mem = g_malloc(3 * num_active_ctlpoints * sizeof(gfloat)); |
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changeset
|
746 xv = mem; |
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|
747 yv = mem + num_active_ctlpoints; |
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|
748 y2v = mem + 2 * num_active_ctlpoints; |
358 | 749 |
359
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|
750 prev = min_x - 1.0; |
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|
751 for (i = dst = 0; i < c->num_ctlpoints; ++i) |
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|
752 if (c->ctlpoint[i][0] > prev) { |
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Re-indentation all (non-generated) code.
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|
753 prev = c->ctlpoint[i][0]; |
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changeset
|
754 xv[dst] = c->ctlpoint[i][0]; |
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changeset
|
755 yv[dst] = c->ctlpoint[i][1]; |
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|
756 ++dst; |
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Re-indentation all (non-generated) code.
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|
757 } |
358 | 758 |
359
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Re-indentation all (non-generated) code.
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diff
changeset
|
759 spline_solve(num_active_ctlpoints, xv, yv, y2v); |
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diff
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|
760 |
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Re-indentation all (non-generated) code.
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changeset
|
761 rx = min_x; |
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Re-indentation all (non-generated) code.
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|
762 dx = (c->max_x - min_x) / (veclen - 1); |
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|
763 for (x = 0; x < veclen; ++x, rx += dx) { |
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changeset
|
764 ry = spline_eval(num_active_ctlpoints, xv, yv, y2v, rx); |
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changeset
|
765 if (ry < c->min_y) |
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Re-indentation all (non-generated) code.
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changeset
|
766 ry = c->min_y; |
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changeset
|
767 if (ry > c->max_y) |
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changeset
|
768 ry = c->max_y; |
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Re-indentation all (non-generated) code.
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diff
changeset
|
769 vector[x] = ry; |
358 | 770 } |
771 | |
359
b1a858b8cb1a
Re-indentation all (non-generated) code.
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diff
changeset
|
772 g_free(mem); |
b1a858b8cb1a
Re-indentation all (non-generated) code.
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diff
changeset
|
773 break; |
358 | 774 |
359
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Re-indentation all (non-generated) code.
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diff
changeset
|
775 case GTK_CURVE_TYPE_LINEAR: |
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Re-indentation all (non-generated) code.
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776 dx = (c->max_x - min_x) / (veclen - 1); |
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777 rx = min_x; |
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778 ry = c->min_y; |
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779 dy = 0.0; |
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780 i = first_active; |
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781 for (x = 0; x < veclen; ++x, rx += dx) { |
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782 if (rx >= c->ctlpoint[i][0]) { |
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783 if (rx > c->ctlpoint[i][0]) |
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784 ry = c->min_y; |
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785 dy = 0.0; |
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786 next = i + 1; |
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787 while (next < c->num_ctlpoints && c->ctlpoint[next][0] <= c->ctlpoint[i][0]) |
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788 ++next; |
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789 if (next < c->num_ctlpoints) { |
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790 delta_x = c->ctlpoint[next][0] - c->ctlpoint[i][0]; |
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791 dy = ((c->ctlpoint[next][1] - c->ctlpoint[i][1]) |
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792 / delta_x); |
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793 dy *= dx; |
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794 ry = c->ctlpoint[i][1]; |
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795 i = next; |
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796 } |
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797 } |
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798 vector[x] = ry; |
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799 ry += dy; |
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800 } |
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801 break; |
358 | 802 |
359
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803 case GTK_CURVE_TYPE_FREE: |
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804 if (c->point) { |
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805 rx = 0.0; |
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806 dx = c->num_points / (double) veclen; |
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807 for (x = 0; x < veclen; ++x, rx += dx) |
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808 vector[x] = unproject(RADIUS + c->height - c->point[(int) rx].y, |
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809 c->min_y, c->max_y, c->height); |
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810 } else |
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811 memset(vector, 0, veclen * sizeof(vector[0])); |
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812 break; |
358 | 813 } |
814 } | |
815 | |
370
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816 GtkWidget *xs_curve_new(void) |
358 | 817 { |
370
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818 return gtk_type_new(xs_curve_get_type()); |
358 | 819 } |
820 | |
370
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821 static void xs_curve_finalize(GtkObject * object) |
358 | 822 { |
370
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823 XSCurve *curve; |
358 | 824 |
359
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825 g_return_if_fail(object != NULL); |
370
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826 g_return_if_fail(XS_IS_CURVE(object)); |
358 | 827 |
370
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828 curve = XS_CURVE(object); |
359
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829 if (curve->pixmap) |
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830 gdk_pixmap_unref(curve->pixmap); |
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831 if (curve->point) |
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832 g_free(curve->point); |
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833 if (curve->ctlpoint) |
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834 g_free(curve->ctlpoint); |
358 | 835 |
359
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836 (*GTK_OBJECT_CLASS(parent_class)->finalize) (object); |
358 | 837 } |