godot/editor/plugins/style_box_editor_plugin.cpp

/*************************************************************************/
/*  style_box_editor_plugin.cpp                                          */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
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#include "style_box_editor_plugin.h"

#include "editor/editor_scale.h"

bool EditorInspectorPluginStyleBox::can_handle(Object *p_object) {

	return Object::cast_to<StyleBox>(p_object) != NULL;
}

void EditorInspectorPluginStyleBox::parse_begin(Object *p_object) {

	Ref<StyleBox> sb = Ref<StyleBox>(Object::cast_to<StyleBox>(p_object));

	StyleBoxPreview *preview = memnew(StyleBoxPreview);
	preview->edit(sb);
	add_custom_control(preview);
}
bool EditorInspectorPluginStyleBox::parse_property(Object *p_object, Variant::Type p_type, const String &p_path, PropertyHint p_hint, const String &p_hint_text, int p_usage) {
	return false; //do not want
}
void EditorInspectorPluginStyleBox::parse_end() {
}

void StyleBoxPreview::edit(const Ref<StyleBox> &p_stylebox) {

	if (stylebox.is_valid())
		stylebox->disconnect_compat("changed", this, "_sb_changed");
	stylebox = p_stylebox;
	if (p_stylebox.is_valid()) {
		preview->add_style_override("panel", stylebox);
		stylebox->connect_compat("changed", this, "_sb_changed");
	}
	_sb_changed();
}

void StyleBoxPreview::_sb_changed() {

	preview->update();
}

void StyleBoxPreview::_redraw() {
	if (stylebox.is_valid()) {
		Rect2 preview_rect = preview->get_rect();

		// Re-adjust preview panel to fit all drawn content
		Rect2 draw_rect = stylebox->get_draw_rect(preview_rect);
		preview_rect.size -= draw_rect.size - preview_rect.size;
		preview_rect.position -= draw_rect.position - preview_rect.position;

		preview->draw_style_box(stylebox, preview_rect);
	}
}

void StyleBoxPreview::_bind_methods() {

	ClassDB::bind_method("_sb_changed", &StyleBoxPreview::_sb_changed);
	ClassDB::bind_method("_redraw", &StyleBoxPreview::_redraw);
}

StyleBoxPreview::StyleBoxPreview() {
	preview = memnew(Control);
	preview->set_custom_minimum_size(Size2(0, 150 * EDSCALE));
	preview->set_clip_contents(true);
	preview->connect_compat("draw", this, "_redraw");
	add_margin_child(TTR("Preview:"), preview);
}

StyleBoxEditorPlugin::StyleBoxEditorPlugin(EditorNode *p_node) {

	Ref<EditorInspectorPluginStyleBox> inspector_plugin;
	inspector_plugin.instance();
	add_inspector_plugin(inspector_plugin);
}