Added mouse demo

1 files changed, 90 insertions, 0 deletions

diff --git a/demo/mouse/mouse.ha b/demo/mouse/mouse.ha
new file mode 100644
index 0000000..13026c6
--- /dev/null
+++ b/demo/mouse/mouse.ha
@@ -0,0 +1,90 @@
+use fmt;
+use tb = termbox2;
+
+def bg = tb::COLOR.DEFAULT;
+def fg = tb::COLOR.BLACK;
+def paint_colors = [
+        (tb::COLOR.BLACK,   "BLACK  "),
+        (tb::COLOR.RED,     "RED    "),
+        (tb::COLOR.GREEN,   "GREEN  "),
+        (tb::COLOR.YELLOW,  "YELLOW "),
+        (tb::COLOR.BLUE,    "BLUE   "),
+        (tb::COLOR.MAGENTA, "MAGENTA"),
+        (tb::COLOR.CYAN,    "CYAN   "),
+];
+def help_text = [
+        "Left-click to paint", 
+        "Right-click to change color",
+        "Press q to exit",
+];
+def exit_keys = [
+        tb::KEY.ESC,
+        tb::KEY.CTRL_Z,
+        tb::KEY.CTRL_C,
+        tb::KEY.CTRL_D,
+];
+def exit_chars = [
+        'q',
+        'Q',
+];
+
+let ii: size = 0; // Current color index
+
+fn handle_mouse_event(me: tb::mouse_event) bool = {
+        switch (me.key) {
+        case tb::KEY.MOUSE_LEFT => tb::set_cell(me.x, me.y, ' ',
+                tb::COLOR.DEFAULT, paint_colors[ii].0)!;
+        case tb::KEY.MOUSE_RIGHT => ii = (ii + 1) % len(paint_colors);
+        case => return false;
+        };
+
+        return false;
+};
+
+fn is_exit_key(ke: tb::key_event) bool = {
+        match (ke.key_or_ch) {
+        case let key: tb::key => for (let k .. exit_keys)
+                if (key == k) return true;
+        case let ch: rune => for (let c .. exit_chars)
+                if (ch == c) return true;
+        };
+        return false;
+};
+
+fn handle_events_and_exit() bool = {
+        let e = tb::poll_event();
+        if (e is tb::err)
+                return false;
+
+        return match (e as tb::event) {
+        case tb::resize_event => yield false;
+        case let me: tb::mouse_event => yield handle_mouse_event(me);
+        case let ke: tb::key_event => yield is_exit_key(ke);
+        };
+};
+
+fn print_help_text() void = {
+        let y = (tb::height()! - len(help_text)): int;
+        let len0 = tb::print(0, y, fg, bg, help_text[0])!;
+        let (c, ctext) = paint_colors[ii];
+        tb::print(len0: int + 1, y, c, bg, ctext)!;
+        for (let i = 1z; i < len(help_text); i += 1)
+                tb::print(0, y + i: int, fg, bg, help_text[i])!;
+};
+
+export fn main() void = {
+        let e = tb::init();
+        if (e is tb::err)
+                fmt::fatalf(tb::strerror(e as tb::err));
+        defer tb::shutdown()!;
+
+        tb::set_input_mode(tb::INPUT.ESC | tb::INPUT.MOUSE)!;
+        tb::set_clear_attrs(fg, bg)!;
+
+        for (true) {
+                print_help_text();
+                tb::present()!;
+                if (handle_events_and_exit()) break;
+        };
+        return;
+};