forked from harryhaaren/pugl
/
pugl_cairo_test.c
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pugl_cairo_test.c
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/*
Copyright 2012-2014 David Robillard <http://drobilla.net>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/**
@file pugl_cairo_test.c A simple Pugl test that creates a top-level window.
*/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <cairo/cairo.h>
#include "pugl/pugl.h"
static int quit = 0;
typedef struct {
int x;
int y;
int w;
int h;
bool pressed;
const char* label;
} Button;
static Button toggle_button = { 16, 16, 128, 64, false, "Test" };
static void
roundedBox(cairo_t* cr, double x, double y, double w, double h)
{
static const double radius = 10;
static const double degrees = 3.14159265 / 180.0;
cairo_new_sub_path(cr);
cairo_arc(cr,
x + w - radius,
y + radius,
radius, -90 * degrees, 0 * degrees);
cairo_arc(cr,
x + w - radius, y + h - radius,
radius, 0 * degrees, 90 * degrees);
cairo_arc(cr,
x + radius, y + h - radius,
radius, 90 * degrees, 180 * degrees);
cairo_arc(cr,
x + radius, y + radius,
radius, 180 * degrees, 270 * degrees);
cairo_close_path(cr);
}
static void
buttonDraw(cairo_t* cr, const Button* but)
{
// Draw base
if (but->pressed) {
cairo_set_source_rgba(cr, 0.4, 0.9, 0.1, 1);
} else {
cairo_set_source_rgba(cr, 0.3, 0.5, 0.1, 1);
}
roundedBox(cr, but->x, but->y, but->w, but->h);
cairo_fill_preserve(cr);
// Draw border
cairo_set_source_rgba(cr, 0.4, 0.9, 0.1, 1);
cairo_set_line_width(cr, 4.0);
cairo_stroke(cr);
// Draw label
cairo_text_extents_t extents;
cairo_set_font_size(cr, 32.0);
cairo_text_extents(cr, but->label, &extents);
cairo_move_to(cr,
(but->x + but->w / 2) - extents.width / 2,
(but->y + but->h / 2) + extents.height / 2);
cairo_set_source_rgba(cr, 0, 0, 0, 1);
cairo_show_text(cr, but->label);
}
static bool
buttonTouches(const Button* but, double x, double y)
{
return (x >= toggle_button.x && x <= toggle_button.x + toggle_button.w &&
y >= toggle_button.y && y <= toggle_button.y + toggle_button.h);
}
static void
onDisplay(PuglView* view)
{
cairo_t* cr = puglGetContext(view);
buttonDraw(cr, &toggle_button);
}
static void
onClose(PuglView* view)
{
quit = 1;
}
static void
onEvent(PuglView* view, const PuglEvent* event)
{
switch (event->type) {
case PUGL_KEY_PRESS:
if (event->key.character == 'q' ||
event->key.character == 'Q' ||
event->key.character == PUGL_CHAR_ESCAPE) {
quit = 1;
}
break;
case PUGL_BUTTON_PRESS:
if (buttonTouches(&toggle_button, event->button.x, event->button.y)) {
toggle_button.pressed = !toggle_button.pressed;
puglPostRedisplay(view);
}
default: break;
}
}
int
main(int argc, char** argv)
{
bool ignoreKeyRepeat = false;
bool resizable = false;
for (int i = 1; i < argc; ++i) {
if (!strcmp(argv[i], "-h")) {
printf("USAGE: %s [OPTIONS]...\n\n"
" -h Display this help\n"
" -i Ignore key repeat\n"
" -r Resizable window\n", argv[0]);
return 0;
} else if (!strcmp(argv[i], "-i")) {
ignoreKeyRepeat = true;
} else if (!strcmp(argv[i], "-r")) {
resizable = true;
} else {
fprintf(stderr, "Unknown option: %s\n", argv[i]);
}
}
PuglView* view = puglInit(NULL, NULL);
puglInitWindowSize(view, 512, 512);
puglInitResizable(view, resizable);
puglInitContextType(view, PUGL_CAIRO);
puglIgnoreKeyRepeat(view, ignoreKeyRepeat);
puglSetEventFunc(view, onEvent);
puglSetDisplayFunc(view, onDisplay);
puglSetCloseFunc(view, onClose);
puglCreateWindow(view, "Pugl Test");
puglShowWindow(view);
while (!quit) {
puglProcessEvents(view);
}
puglDestroy(view);
return 0;
}