ui/gtk/graphics.c

Sun, 13 Oct 2024 14:34:12 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 13 Oct 2024 14:34:12 +0200
branch
newapi
changeset 335
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parent 299
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permissions
-rw-r--r--

add new textarea (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 "graphics.h"
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33 #include "container.h"
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34 #include "../common/object.h"
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35
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36 UIWIDGET ui_drawingarea(UiObject *obj, ui_drawfunc f, void *userdata) {
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37 GtkWidget *widget = gtk_drawing_area_new();
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38
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39 if(f) {
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40 UiDrawEvent *event = malloc(sizeof(UiDrawEvent));
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41 event->obj = obj;
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42 event->callback = f;
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43 event->userdata = userdata;
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44 ui_connect_draw_handler(widget, event);
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45 }
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46
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47 UiContainer *ct = uic_get_current_container(obj);
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48 ct->add(ct, widget, TRUE);
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49
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50 return widget;
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51 }
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52
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53
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54 #if GTK_MAJOR_VERSION <= 3
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55 static gboolean widget_button_pressed(
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56 GtkWidget *widget,
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57 GdkEvent *event,
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58 gpointer userdata)
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59 {
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60 UiEventData *eventdata = userdata;
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61
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62 UiMouseEvent me;
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63 me.x = (int)event->button.x;
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64 me.y = (int)event->button.y;
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65
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66 int exec = 0;
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67 if(event->button.type == GDK_BUTTON_PRESS) {
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68 exec = 1;
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69 me.type = UI_PRESS;
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70 } else if(event->button.type == GDK_2BUTTON_PRESS) {
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71 exec = 1;
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72 me.type = UI_PRESS2;
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73 }
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74
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75 if(exec) {
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76 UiEvent e;
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77 e.obj = eventdata->obj;
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78 e.window = eventdata->obj->window;
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79 e.document = eventdata->obj->ctx->document;
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80 e.eventdata = &me;
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81 e.intval = 0;
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82 eventdata->callback(&e, eventdata->userdata);
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83 }
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84 return TRUE;
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85 }
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86 #endif
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87
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88 void ui_drawingarea_getsize(UIWIDGET drawingarea, int *width, int *height) {
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89 #if GTK_MAJOR_VERSION >= 4
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90 *width = gtk_widget_get_width(drawingarea);
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91 *height = gtk_widget_get_height(drawingarea);
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92 #elif GTK_MAJOR_VERSION == 3
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93 *width = gtk_widget_get_allocated_width(drawingarea);
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94 *height = gtk_widget_get_allocated_height(drawingarea);
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95 #else
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96 *width = drawingarea->allocation.width;
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97 *height = drawingarea->allocation.height;
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98 #endif
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99 }
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100
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101 void ui_drawingarea_redraw(UIWIDGET drawingarea) {
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102 gtk_widget_queue_draw(drawingarea);
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103 }
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104
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105 void ui_drawingarea_mousehandler(UiObject *obj, UIWIDGET widget, ui_callback f, void *u) {
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106 #if GTK_MAJOR_VERSION >= 4
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107 // TODO
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108 #else
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109 gtk_widget_set_events(widget, GDK_BUTTON_PRESS_MASK);
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110 if(f) {
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111 UiEventData *event = malloc(sizeof(UiEventData));
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112 event->obj = obj;
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113 event->callback = f;
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114 event->userdata = u;
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115 event->customdata = NULL;
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116 event->value = 0;
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117
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118 g_signal_connect(G_OBJECT(widget),
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119 "button-press-event",
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120 G_CALLBACK(widget_button_pressed),
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121 event);
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122 } else {
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123 // TODO: warning
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124 }
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125 #endif
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126 }
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127
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128
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129 // text layout
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130 UiTextLayout* ui_text(UiGraphics *g) {
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131 UiTextLayout *layout = malloc(sizeof(UiTextLayout));
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132 PangoContext *pc = ui_get_pango_context(g);
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133 layout->layout = pango_layout_new(pc);
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134 return layout;
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135 }
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136
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137 void ui_text_setstring(UiTextLayout *layout, char *str) {
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138 pango_layout_set_text(layout->layout, str, -1);
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139 }
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141 void ui_text_setstringl(UiTextLayout *layout, char *str, int len) {
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142 pango_layout_set_text(layout->layout, str, len);
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143 }
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144
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145 void ui_text_setfont(UiTextLayout *layout, char *font, int size) {
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146 PangoFontDescription *fontDesc;
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147 fontDesc = pango_font_description_from_string(font);
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148 pango_font_description_set_size(fontDesc, size * PANGO_SCALE);
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149 pango_layout_set_font_description(layout->layout, fontDesc);
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150 pango_font_description_free(fontDesc);
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151 }
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152
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153 void ui_text_getsize(UiTextLayout *layout, int *width, int *height) {
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154 pango_layout_get_size(layout->layout, width, height);
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155 *width = *width / PANGO_SCALE;
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156 *height = *height / PANGO_SCALE;
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157 }
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158
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159 void ui_text_setwidth(UiTextLayout *layout, int width) {
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160 pango_layout_set_width(layout->layout, width * PANGO_SCALE);
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161 pango_layout_set_ellipsize(layout->layout, PANGO_ELLIPSIZE_END);
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162 //pango_layout_set_wrap(layout->layout, PANGO_WRAP_WORD_CHAR);
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163 }
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164
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165 void ui_text_free(UiTextLayout *text) {
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166 g_object_unref(text->layout);
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167 free(text);
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168 }

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