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// MIT License, Copyright (c) 2021 Marvin Borner
#include <libgui/gui.h>
#define COLOR_SIZE 50
#define TOOLBAR_MARGIN 2
static const u32 colors[] = { COLOR_BLACK, COLOR_RED, COLOR_GREEN, COLOR_YELLOW,
COLOR_BLUE, COLOR_MAGENTA, COLOR_CYAN, COLOR_WHITE };
static u32 current_color = COLOR_BLACK;
static u32 size = 5;
static void mousemove(struct gui_event_mouse *event)
{
static vec2 last = { 0 };
if (event->scroll && !(event->scroll == -1 && size <= 1))
size += event->scroll;
if (event->but.left) {
gui_draw_line(event->win, event->widget, GUI_LAYER_FG, last, event->pos, size,
current_color);
gui_redraw_widget(event->win, event->widget);
}
last = event->pos;
}
static void color_click(struct gui_event_mouse *event)
{
current_color = colors[event->widget - 2];
}
// TODO: Simplify using predefined widgets and utilities
int main(void)
{
u32 win = gui_new_window(APPNAME);
vec2 win_size = gui_window_size(win);
u32 toolbar = gui_new_widget(win, GUI_MAIN, vec2(0, 0),
vec2(win_size.x, COLOR_SIZE + 2 * TOOLBAR_MARGIN));
gui_fill(win, toolbar, GUI_LAYER_BG, COLOR_WHITE);
u32 color_count = COUNT(colors);
for (u32 i = 0; i < color_count; i++) {
u32 color = gui_new_widget(win, toolbar,
vec2(TOOLBAR_MARGIN + i * (COLOR_SIZE + TOOLBAR_MARGIN),
TOOLBAR_MARGIN),
vec2(COLOR_SIZE, COLOR_SIZE));
gui_fill(win, color, GUI_LAYER_FG, colors[i]);
gui_draw_border(win, color, GUI_LAYER_FG, 2, COLOR_BLACK);
gui_listen_widget(win, color, GUI_LISTEN_MOUSECLICK, (u32)color_click);
}
u32 canvas =
gui_new_widget(win, GUI_MAIN, vec2(0, COLOR_SIZE + 2 * TOOLBAR_MARGIN),
vec2(win_size.x, win_size.y - (COLOR_SIZE + 2 * TOOLBAR_MARGIN)));
gui_fill(win, canvas, GUI_LAYER_BG, COLOR_WHITE);
gui_listen_widget(win, canvas, GUI_LISTEN_MOUSEMOVE, (u32)mousemove);
gui_redraw_window(win);
gui_loop();
return 0;
}
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