Added paint demo

2 files changed, 69 insertions, 0 deletions

diff --git a/apps/paint/Makefile b/apps/paint/Makefile
new file mode 100644
index 0000000..77abe79
--- /dev/null
+++ b/apps/paint/Makefile
@@ -0,0 +1,7 @@
+# MIT License, Copyright (c) 2021 Marvin Borner
+
+NAME = paint
+OBJS = main.o
+LIBS = -lgui -lc
+
+include ../generic.mk
diff --git a/apps/paint/main.c b/apps/paint/main.c
new file mode 100644
index 0000000..50234af
--- /dev/null
+++ b/apps/paint/main.c
@@ -0,0 +1,62 @@
+// 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];
+}
+
+int main(void)
+{
+	u32 win;
+	gui_new_window(&win);
+	vec2 win_size = gui_window_size(win);
+
+	u32 toolbar;
+	gui_new_widget(&toolbar, win, vec2(0, 0), vec2(win_size.x, COLOR_SIZE));
+	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_add_widget(&color, win, toolbar, vec2(i * (COLOR_SIZE + TOOLBAR_MARGIN), 0),
+			       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(&canvas, win, vec2(0, COLOR_SIZE),
+		       vec2(win_size.x, win_size.y - COLOR_SIZE));
+	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;
+}