add ui buttons for undo/redo

README.md

@@ -4,6 +4,9 @@
 logic mostly like https://git.crispypin.cc/CrispyPin/marble
 
 ## todo
+- accessibility
+  - background colour setting
+  - hotkeys for everything
 - more levels
 - make direct power (comparator -> machine) work, (needs storing power direction in machine tiles)
 - cut selections, copy to system clipboard

src/editor.rs

@@ -644,11 +644,7 @@ impl Editor {
 			if simple_button(d, 85, 5, 60, 30) {
 				self.exit_state = ExitState::ExitAndSave;
 			}
-			d.draw_text("save", 90, 10, 20, Color::WHITE);
+			d.draw_text("exit", 90, 10, 20, Color::WHITE);
-			if simple_button(d, 150, 5, 80, 30) {
-				self.exit_state = ExitState::ExitNoSave;
-			}
-			d.draw_text("revert", 155, 10, 20, Color::WHITE);
 		} else {
 			if simple_button(d, 5, 5, 75, 30) {
 				self.exit_menu = true;
@@ -660,7 +656,27 @@ impl Editor {
 			d.draw_text("save", 90, 10, 20, Color::WHITE);
 		}
 
-		simple_toggle_button(d, &mut self.draw_overlay, 235, 4, 20, 32, 4);
+		if simple_button(d, 150, 4, 32, 32) {
+			self.undo()
+		}
+		let undo_icon = if self.undo_index > 0 {
+			"undo"
+		} else {
+			"undo_disabled"
+		};
+		draw_scaled_texture(d, textures.get(undo_icon), 150, 4, 2.);
+
+		if simple_button(d, 186, 4, 32, 32) {
+			self.redo()
+		}
+		let redo_icon = if self.undo_index < self.undo_history.len() {
+			"redo"
+		} else {
+			"redo_disabled"
+		};
+		draw_scaled_texture(d, textures.get(redo_icon), 186, 4, 2.);
+
+		simple_toggle_button(d, &mut self.draw_overlay, 223, 4, 32, 32, 4);
 
 		match self.sim_state {
 			SimState::Editing => {