godot/editor/pane_drag.cpp

/*************************************************************************/
/*  pane_drag.cpp                                                        */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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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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#include "pane_drag.h"

void PaneDrag::_gui_input(const Ref<InputEvent> &p_input) {
	Ref<InputEventMouseMotion> mm = p_input;
	if (mm.is_valid() && mm->get_button_mask() & BUTTON_MASK_LEFT) {
		emit_signal("dragged", Point2(mm->get_relative().x, mm->get_relative().y));
	}
}

void PaneDrag::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_DRAW: {
			Ref<Texture2D> icon = mouse_over ? get_theme_icon("PaneDragHover", "EditorIcons") : get_theme_icon("PaneDrag", "EditorIcons");
			if (!icon.is_null()) {
				icon->draw(get_canvas_item(), Point2(0, 0));
			}

		} break;
		case NOTIFICATION_MOUSE_ENTER:
			mouse_over = true;
			update();
			break;
		case NOTIFICATION_MOUSE_EXIT:
			mouse_over = false;
			update();
			break;
	}
}

Size2 PaneDrag::get_minimum_size() const {
	Ref<Texture2D> icon = get_theme_icon("PaneDrag", "EditorIcons");
	if (!icon.is_null()) {
		return icon->get_size();
	}
	return Size2();
}

void PaneDrag::_bind_methods() {
	ClassDB::bind_method("_gui_input", &PaneDrag::_gui_input);
	ADD_SIGNAL(MethodInfo("dragged", PropertyInfo(Variant::VECTOR2, "amount")));
}

PaneDrag::PaneDrag() {
	mouse_over = false;
}