From aaa7f625df9fbe921be992fa849dd859a9c0a867 Mon Sep 17 00:00:00 2001
From: Liangdi <wu@liangdi.me>
Date: Sun, 21 Oct 2018 21:56:05 +0800
Subject: support New TileSet Editor zooming use CTRL/CMD + MouseWheel fixed
 code style for clang-format

apply clang-format
---
 editor/plugins/tile_set_editor_plugin.cpp | 57 +++++++++++++++++++++++--------
 editor/plugins/tile_set_editor_plugin.h   |  8 +++++
 2 files changed, 50 insertions(+), 15 deletions(-)

diff --git a/editor/plugins/tile_set_editor_plugin.cpp b/editor/plugins/tile_set_editor_plugin.cpp
index 9988d82fb8..7936b2a1e7 100644
--- a/editor/plugins/tile_set_editor_plugin.cpp
+++ b/editor/plugins/tile_set_editor_plugin.cpp
@@ -483,6 +483,11 @@ TileSetEditor::TileSetEditor(EditorNode *p_editor) {
 	//---------------
 	helper = memnew(TilesetEditorContext(this));
 	tile_names_opacity = 0;
+
+	// config scale
+	max_scale = 10.0f;
+	min_scale = 0.1f;
+	scale_ratio = 1.2f;
 }
 
 TileSetEditor::~TileSetEditor() {
@@ -972,6 +977,15 @@ void TileSetEditor::_on_workspace_input(const Ref<InputEvent> &p_ie) {
 				}
 			}
 		}
+
+		// Mouse Wheel Event
+		const int _mouse_button_index = mb->get_button_index();
+		if (_mouse_button_index == BUTTON_WHEEL_UP && mb->get_control()) {
+			_zoom_in();
+
+		} else if (_mouse_button_index == BUTTON_WHEEL_DOWN && mb->get_control()) {
+			_zoom_out();
+		}
 	}
 	// Drag Middle Mouse
 	if (mm.is_valid()) {
@@ -1448,23 +1462,11 @@ void TileSetEditor::_on_tool_clicked(int p_tool) {
 			}
 		}
 	} else if (p_tool == ZOOM_OUT) {
-		float scale = workspace->get_scale().x;
-		if (scale > 0.1) {
-			scale /= 2;
-			workspace->set_scale(Vector2(scale, scale));
-			workspace_container->set_custom_minimum_size(workspace->get_rect().size * scale);
-			workspace_overlay->set_custom_minimum_size(workspace->get_rect().size * scale);
-		}
+		_zoom_out();
 	} else if (p_tool == ZOOM_1) {
-		workspace->set_scale(Vector2(1, 1));
-		workspace_container->set_custom_minimum_size(workspace->get_rect().size);
-		workspace_overlay->set_custom_minimum_size(workspace->get_rect().size);
+		_reset_zoom();
 	} else if (p_tool == ZOOM_IN) {
-		float scale = workspace->get_scale().x;
-		scale *= 2;
-		workspace->set_scale(Vector2(scale, scale));
-		workspace_container->set_custom_minimum_size(workspace->get_rect().size * scale);
-		workspace_overlay->set_custom_minimum_size(workspace->get_rect().size * scale);
+		_zoom_in();
 	} else if (p_tool == TOOL_SELECT) {
 		if (creating_shape) {
 			// Cancel Creation
@@ -1503,6 +1505,31 @@ void TileSetEditor::_set_snap_sep(Vector2 p_val) {
 	workspace->update();
 }
 
+void TileSetEditor::_zoom_in() {
+	float scale = workspace->get_scale().x;
+	if (scale < max_scale) {
+		scale *= scale_ratio;
+		workspace->set_scale(Vector2(scale, scale));
+		workspace_container->set_custom_minimum_size(workspace->get_rect().size * scale);
+		workspace_overlay->set_custom_minimum_size(workspace->get_rect().size * scale);
+	}
+}
+void TileSetEditor::_zoom_out() {
+
+	float scale = workspace->get_scale().x;
+	if (scale > min_scale) {
+		scale /= scale_ratio;
+		workspace->set_scale(Vector2(scale, scale));
+		workspace_container->set_custom_minimum_size(workspace->get_rect().size * scale);
+		workspace_overlay->set_custom_minimum_size(workspace->get_rect().size * scale);
+	}
+}
+void TileSetEditor::_reset_zoom() {
+	workspace->set_scale(Vector2(1, 1));
+	workspace_container->set_custom_minimum_size(workspace->get_rect().size);
+	workspace_overlay->set_custom_minimum_size(workspace->get_rect().size);
+}
+
 void TileSetEditor::draw_highlight_current_tile() {
 
 	if (get_current_tile() >= 0) {
diff --git a/editor/plugins/tile_set_editor_plugin.h b/editor/plugins/tile_set_editor_plugin.h
index 23bf68b90f..bd8a2ddb98 100644
--- a/editor/plugins/tile_set_editor_plugin.h
+++ b/editor/plugins/tile_set_editor_plugin.h
@@ -141,6 +141,10 @@ class TileSetEditor : public Control {
 	EditMode edit_mode;
 	int current_tile;
 
+	float max_scale;
+	float min_scale;
+	float scale_ratio;
+
 	void update_texture_list();
 	void update_texture_list_icon();
 
@@ -178,6 +182,10 @@ private:
 	void _set_snap_off(Vector2 p_val);
 	void _set_snap_sep(Vector2 p_val);
 
+	void _zoom_in();
+	void _zoom_out();
+	void _reset_zoom();
+
 	void draw_highlight_current_tile();
 	void draw_highlight_subtile(Vector2 coord, const Vector<Vector2> &other_highlighted = Vector<Vector2>());
 	void draw_tile_subdivision(int p_id, Color p_color) const;
-- 
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