//********************************** Banshee Engine (www.banshee3d.com) **************************************************//
//**************** Copyright (c) 2016 Marko Pintera (marko.pintera@gmail.com). All rights reserved. **********************//
#include "GUI/BsGUIWindowFrameWidget.h"
#include "RTTI/BsGUIWindowFrameWidgetRTTI.h"
#include "GUI/BsGUIPanel.h"
#include "GUI/BsCGUIWidget.h"
#include "GUI/BsGUILayout.h"
#include "GUI/BsGUITexture.h"
#include "GUI/BsGUIWindowFrame.h"
#include "RenderAPI/BsRenderWindow.h"
#include "Platform/BsPlatform.h"

namespace bs
{
	const UINT32 WindowFrameWidget::RESIZE_BORDER_WIDTH = 3;

	WindowFrameWidget::WindowFrameWidget(const HSceneObject& parent, bool allowResize, const SPtr<Camera>& camera, RenderWindow* parentWindow, const HGUISkin& skin)
		:CGUIWidget(parent, camera), mAllowResize(allowResize), mWindowFramePanel(nullptr), mParentWindow(parentWindow)
	{
		setSkin(skin);

		GUIPanel* backgroundPanel = getPanel()->addNewElement<GUIPanel>(500);
		backgroundPanel->addElement(GUITexture::create(TextureScaleMode::RepeatToFit,
			GUIOptions(GUIOption::flexibleWidth(), GUIOption::flexibleHeight()), "WindowBackground"));

		mWindowFramePanel = getPanel()->addNewElement<GUIPanel>(499);

		mWindowFrame = GUIWindowFrame::create("WindowFrame");
		mWindowFramePanel->addElement(mWindowFrame);

		refreshNonClientAreas();
	}

	void WindowFrameWidget::ownerWindowFocusChanged()
	{
		mWindowFrame->setFocused(mParentWindow->getProperties().hasFocus);

		CGUIWidget::ownerWindowFocusChanged();
	}

	void WindowFrameWidget::ownerTargetResized()
	{
		CGUIWidget::ownerTargetResized();

		refreshNonClientAreas();
	}

	void WindowFrameWidget::refreshNonClientAreas() const
	{
		if (!mAllowResize)
			return;

		INT32 x = 0;
		INT32 y = 0;

		UINT32 width = getTarget()->getPixelArea().width;
		UINT32 height = getTarget()->getPixelArea().height;

		Vector<NonClientResizeArea> nonClientAreas(8);

		nonClientAreas[0].type = NonClientAreaBorderType::TopLeft;
		nonClientAreas[0].area = Rect2I(x, y, 
			RESIZE_BORDER_WIDTH, RESIZE_BORDER_WIDTH);

		nonClientAreas[1].type = NonClientAreaBorderType::Top;
		nonClientAreas[1].area = Rect2I(x + RESIZE_BORDER_WIDTH, y, 
			width - 2 * RESIZE_BORDER_WIDTH, RESIZE_BORDER_WIDTH);

		nonClientAreas[2].type = NonClientAreaBorderType::TopRight;
		nonClientAreas[2].area = Rect2I(x + width - RESIZE_BORDER_WIDTH, y, 
			RESIZE_BORDER_WIDTH, RESIZE_BORDER_WIDTH);

		nonClientAreas[3].type = NonClientAreaBorderType::Left;
		nonClientAreas[3].area = Rect2I(x, y + RESIZE_BORDER_WIDTH, 
			RESIZE_BORDER_WIDTH, height - 2 * RESIZE_BORDER_WIDTH);

		nonClientAreas[4].type = NonClientAreaBorderType::Right;
		nonClientAreas[4].area = Rect2I(x + width - RESIZE_BORDER_WIDTH, y + RESIZE_BORDER_WIDTH, 
			RESIZE_BORDER_WIDTH, height - 2 * RESIZE_BORDER_WIDTH);

		nonClientAreas[5].type = NonClientAreaBorderType::BottomLeft;
		nonClientAreas[5].area = Rect2I(x, y + height - RESIZE_BORDER_WIDTH, 
			RESIZE_BORDER_WIDTH, RESIZE_BORDER_WIDTH);

		nonClientAreas[6].type = NonClientAreaBorderType::Bottom;
		nonClientAreas[6].area = Rect2I(x + RESIZE_BORDER_WIDTH, y + height - RESIZE_BORDER_WIDTH, 
			width - 2 * RESIZE_BORDER_WIDTH, RESIZE_BORDER_WIDTH);

		nonClientAreas[7].type = NonClientAreaBorderType::BottomRight;
		nonClientAreas[7].area = Rect2I(x + width - RESIZE_BORDER_WIDTH, y + height - RESIZE_BORDER_WIDTH, 
			RESIZE_BORDER_WIDTH, RESIZE_BORDER_WIDTH);

		Platform::setResizeNonClientAreas(*mParentWindow->getCore(), nonClientAreas);
	}

	RTTITypeBase* WindowFrameWidget::getRTTIStatic()
	{
		return WindowFrameWidgetRTTI::instance();
	}

	RTTITypeBase* WindowFrameWidget::getRTTI() const
	{
		return WindowFrameWidget::getRTTIStatic();
	}
}