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implement textfield onchange event (GTK)
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1 | /* |
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2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
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3 | * |
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4 | * Copyright 2017 Olaf Wintermann. All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are met: |
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8 | * |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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26 | * POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include <stdio.h> |
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30 | #include <stdlib.h> |
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31 | |
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32 | #include "container.h" |
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33 | |
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34 | #include "draw_cairo.h" |
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35 | |
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36 | |
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37 | #if GTK_MAJOR_VERSION >= 3 |
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38 | static void ui_drawingarea_draw( |
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39 | GtkDrawingArea *area, |
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40 | cairo_t *cr, |
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41 | int width, |
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42 | int height, |
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43 | gpointer data) |
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44 | { |
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45 | UiCairoGraphics g; |
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46 | g.g.width = width; |
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47 | g.g.height = height; |
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48 | g.widget = GTK_WIDGET(area); |
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49 | g.cr = cr; |
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50 | |
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51 | UiDrawEvent *event = data; |
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52 | UiEvent ev; |
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53 | ev.obj = event->obj; |
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54 | ev.window = event->obj->window; |
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55 | ev.document = event->obj->ctx->document; |
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56 | |
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57 | event->callback(&ev, &g.g, event->userdata); |
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58 | } |
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59 | #endif |
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60 | |
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61 | #if UI_GTK3 |
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62 | gboolean ui_drawingarea_expose(GtkWidget *w, cairo_t *cr, void *data) { |
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63 | int width = gtk_widget_get_allocated_width(w); |
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64 | int height = gtk_widget_get_allocated_height(w); |
300 | 65 | ui_drawingarea_draw(GTK_DRAWING_AREA(w), cr, width, height, data); |
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66 | return FALSE; |
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67 | } |
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68 | #endif |
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69 | #ifdef UI_GTK2 |
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70 | gboolean ui_canvas_expose(GtkWidget *w, GdkEventExpose *e, void *data) { |
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71 | UiCairoGraphics g; |
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72 | g.g.width = w->allocation.width; |
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73 | g.g.height = w->allocation.height; |
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74 | g.widget = w; |
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75 | g.cr = gdk_cairo_create(w->window); |
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76 | |
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77 | UiDrawEvent *event = data; |
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78 | UiEvent ev; |
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79 | ev.obj = event->obj; |
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80 | ev.window = event->obj->window; |
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81 | ev.document = event->obj->ctx->document; |
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82 | |
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83 | event->callback(&ev, &g.g, event->userdata); |
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84 | |
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85 | return FALSE; |
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86 | } |
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87 | #endif |
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88 | |
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89 | // function from graphics.h |
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90 | |
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91 | void ui_connect_draw_handler(GtkWidget *widget, UiDrawEvent *event) { |
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92 | #if GTK_MAJOR_VERSION >= 4 |
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93 | gtk_drawing_area_set_draw_func(GTK_DRAWING_AREA(widget), ui_drawingarea_draw, event, NULL); |
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94 | #elif GTK_MAJOR_VERSION == 3 |
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95 | g_signal_connect(G_OBJECT(widget), |
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96 | "draw", |
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97 | G_CALLBACK(ui_drawingarea_expose), |
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98 | event); |
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99 | #else |
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100 | g_signal_connect(G_OBJECT(widget), |
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101 | "expose_event", |
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102 | G_CALLBACK(ui_canvas_expose), |
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103 | event); |
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104 | #endif |
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105 | } |
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106 | |
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107 | |
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108 | PangoContext *ui_get_pango_context(UiGraphics *g) { |
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109 | UiCairoGraphics *gr = (UiCairoGraphics*)g; |
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110 | //return gtk_widget_get_pango_context(gr->widget); |
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111 | return pango_cairo_create_context(gr->cr); |
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112 | } |
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113 | |
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114 | |
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115 | // drawing functions |
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116 | void ui_graphics_color(UiGraphics *g, int red, int green, int blue) { |
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117 | UiCairoGraphics *gr = (UiCairoGraphics*)g; |
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118 | double dred = (double)red / (double)255; |
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119 | double dgreen = (double)green / (double)255; |
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120 | double dblue = (double)blue / (double)255; |
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121 | cairo_set_source_rgb(gr->cr, dred, dgreen, dblue); |
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122 | } |
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123 | |
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124 | |
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125 | void ui_draw_line(UiGraphics *g, int x1, int y1, int x2, int y2) { |
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126 | UiCairoGraphics *gr = (UiCairoGraphics*)g; |
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127 | cairo_set_line_width(gr->cr, 1); |
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128 | cairo_move_to(gr->cr, (double)x1 + 0.5, (double)y1 + 0.5); |
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129 | cairo_line_to(gr->cr, (double)x2 + 0.5, (double)y2 + 0.5); |
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130 | cairo_stroke(gr->cr); |
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131 | } |
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132 | |
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133 | void ui_draw_rect(UiGraphics *g, int x, int y, int w, int h, int fill) { |
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134 | UiCairoGraphics *gr = (UiCairoGraphics*)g; |
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135 | cairo_set_line_width(gr->cr, 1); |
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136 | cairo_rectangle(gr->cr, x + 0.5, y + 0.5 , w, h); |
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137 | if(fill) { |
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138 | cairo_fill(gr->cr); |
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139 | } else { |
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140 | cairo_stroke(gr->cr); |
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141 | } |
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142 | } |
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143 | |
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144 | void ui_draw_text(UiGraphics *g, int x, int y, UiTextLayout *text) { |
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145 | UiCairoGraphics *gr = (UiCairoGraphics*)g; |
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146 | cairo_move_to(gr->cr, x, y); |
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147 | pango_cairo_show_layout(gr->cr, text->layout); |
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148 | } |
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149 |