Overhaul the theme editor and improve user experience

editor/plugins/theme_editor_preview.h

@@ -0,0 +1,118 @@
+/*************************************************************************/
+/*  theme_editor_preview.h                                               */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#ifndef THEME_EDITOR_PREVIEW_H
+#define THEME_EDITOR_PREVIEW_H
+
+#include "scene/gui/box_container.h"
+#include "scene/gui/check_box.h"
+#include "scene/gui/check_button.h"
+#include "scene/gui/color_picker.h"
+#include "scene/gui/color_rect.h"
+#include "scene/gui/label.h"
+#include "scene/gui/margin_container.h"
+#include "scene/gui/menu_button.h"
+#include "scene/gui/option_button.h"
+#include "scene/gui/panel.h"
+#include "scene/gui/progress_bar.h"
+#include "scene/gui/scroll_container.h"
+#include "scene/gui/separator.h"
+#include "scene/gui/spin_box.h"
+#include "scene/gui/tab_container.h"
+#include "scene/gui/text_edit.h"
+#include "scene/gui/tree.h"
+#include "scene/resources/theme.h"
+
+#include "editor/editor_node.h"
+
+class ThemeEditorPreview : public VBoxContainer {
+	GDCLASS(ThemeEditorPreview, VBoxContainer);
+
+	ColorRect *preview_bg;
+	MarginContainer *preview_overlay;
+	Control *picker_overlay;
+	Control *hovered_control = nullptr;
+
+	double time_left = 0;
+
+	void _propagate_redraw(Control *p_at);
+	void _refresh_interval();
+	void _preview_visibility_changed();
+
+	void _picker_button_cbk();
+	Control *_find_hovered_control(Control *p_parent, Vector2 p_mouse_position);
+
+	void _draw_picker_overlay();
+	void _gui_input_picker_overlay(const Ref<InputEvent> &p_event);
+
+protected:
+	HBoxContainer *preview_toolbar;
+	MarginContainer *preview_content;
+	Button *picker_button;
+
+	void add_preview_overlay(Control *p_overlay);
+
+	void _notification(int p_what);
+	static void _bind_methods();
+
+public:
+	void set_preview_theme(const Ref<Theme> &p_theme);
+
+	ThemeEditorPreview();
+};
+
+class DefaultThemeEditorPreview : public ThemeEditorPreview {
+	GDCLASS(DefaultThemeEditorPreview, ThemeEditorPreview);
+
+public:
+	DefaultThemeEditorPreview();
+};
+
+class SceneThemeEditorPreview : public ThemeEditorPreview {
+	GDCLASS(SceneThemeEditorPreview, ThemeEditorPreview);
+
+	Ref<PackedScene> loaded_scene;
+
+	Button *reload_scene_button;
+
+	void _reload_scene();
+
+protected:
+	void _notification(int p_what);
+	static void _bind_methods();
+
+public:
+	bool set_preview_scene(const String &p_path);
+	String get_preview_scene_path() const;
+
+	SceneThemeEditorPreview();
+};
+
+#endif // THEME_EDITOR_PREVIEW_H