2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
4 * Copyright 2017 Olaf Wintermann. All rights reserved.
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7 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright
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26 * POSSIBILITY OF SUCH DAMAGE.
32 #include "container.h"
34 #include "draw_cairo.h"
37 gboolean ui_drawingarea_expose(GtkWidget *w, cairo_t *cr, void *data) {
39 g.g.width = gtk_widget_get_allocated_width(w);
40 g.g.height = gtk_widget_get_allocated_height(w);
44 UiDrawEvent *event = data;
47 ev.window = event->obj->window;
48 ev.document = event->obj->ctx->document;
50 event->callback(&ev, &g.g, event->userdata);
55 gboolean ui_canvas_expose(GtkWidget *w, GdkEventExpose *e, void *data) {
57 g.g.width = w->allocation.width;
58 g.g.height = w->allocation.height;
60 g.cr = gdk_cairo_create(w->window);
62 UiDrawEvent *event = data;
65 ev.window = event->obj->window;
66 ev.document = event->obj->ctx->document;
68 event->callback(&ev, &g.g, event->userdata);
74 // function from graphics.h
76 void ui_connect_draw_handler(GtkWidget *widget, UiDrawEvent *event) {
78 g_signal_connect(G_OBJECT(widget),
80 G_CALLBACK(ui_drawingarea_expose),
83 g_signal_connect(G_OBJECT(widget),
85 G_CALLBACK(ui_canvas_expose),
91 PangoContext *ui_get_pango_context(UiGraphics *g) {
92 UiCairoGraphics *gr = (UiCairoGraphics*)g;
93 //return gtk_widget_get_pango_context(gr->widget);
94 return pango_cairo_create_context(gr->cr);
99 void ui_graphics_color(UiGraphics *g, int red, int green, int blue) {
100 UiCairoGraphics *gr = (UiCairoGraphics*)g;
101 double dred = (double)red / (double)255;
102 double dgreen = (double)green / (double)255;
103 double dblue = (double)blue / (double)255;
104 cairo_set_source_rgb(gr->cr, dred, dgreen, dblue);
108 void ui_draw_line(UiGraphics *g, int x1, int y1, int x2, int y2) {
109 UiCairoGraphics *gr = (UiCairoGraphics*)g;
110 cairo_set_line_width(gr->cr, 1);
111 cairo_move_to(gr->cr, (double)x1 + 0.5, (double)y1 + 0.5);
112 cairo_line_to(gr->cr, (double)x2 + 0.5, (double)y2 + 0.5);
113 cairo_stroke(gr->cr);
116 void ui_draw_rect(UiGraphics *g, int x, int y, int w, int h, int fill) {
117 UiCairoGraphics *gr = (UiCairoGraphics*)g;
118 cairo_set_line_width(gr->cr, 1);
119 cairo_rectangle(gr->cr, x + 0.5, y + 0.5 , w, h);
123 cairo_stroke(gr->cr);
127 void ui_draw_text(UiGraphics *g, int x, int y, UiTextLayout *text) {
128 UiCairoGraphics *gr = (UiCairoGraphics*)g;
129 cairo_move_to(gr->cr, x, y);
130 pango_cairo_show_layout(gr->cr, text->layout);