ui/gtk/draw_cairo.c

Sun, 06 Oct 2024 18:43:06 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 06 Oct 2024 18:43:06 +0200
changeset 50
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parent 44
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permissions
-rw-r--r--

fix startup in case the dav config doesn't exist

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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);
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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
0
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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

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