/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

/*
 * Copyright (C) 2006-2010 - Frictional Games
 *
 * This file is part of HPL1 Engine.
 */

#include "hpl1/engine/gui/WidgetButton.h"

#include "hpl1/engine/system/low_level_system.h"

#include "hpl1/engine/math/Math.h"

#include "hpl1/engine/system/String.h"

#include "hpl1/engine/gui/Gui.h"
#include "hpl1/engine/gui/GuiGfxElement.h"
#include "hpl1/engine/gui/GuiSet.h"
#include "hpl1/engine/gui/GuiSkin.h"

#include "hpl1/engine/graphics/font_data.h"

namespace hpl {

//////////////////////////////////////////////////////////////////////////
// CONSTRUCTORS
//////////////////////////////////////////////////////////////////////////

//-----------------------------------------------------------------------

cWidgetButton::cWidgetButton(cGuiSet *apSet, cGuiSkin *apSkin) : iWidget(eWidgetType_Button, apSet, apSkin) {
	mbPressed = false;
	mpImage = NULL;
}

//-----------------------------------------------------------------------

cWidgetButton::~cWidgetButton() {
	if (mpImage && mbDestroyImage) {
		mpGui->DestroyGfx(mpImage);
	}
}

//-----------------------------------------------------------------------

//////////////////////////////////////////////////////////////////////////
// PUBLIC METHODS
//////////////////////////////////////////////////////////////////////////

//-----------------------------------------------------------------------

void cWidgetButton::SetImage(cGuiGfxElement *apImage, bool abDestroyImage) {
	mpImage = apImage;
	mbDestroyImage = abDestroyImage;
}

//-----------------------------------------------------------------------

//////////////////////////////////////////////////////////////////////////
// PROTECTED METHODS
//////////////////////////////////////////////////////////////////////////

//-----------------------------------------------------------------------

void cWidgetButton::OnLoadGraphics() {
	/////////////////////////
	// Up
	mpGfxBackgroundUp = mpSkin->GetGfx(eGuiSkinGfx_ButtonUpBackground);

	mvGfxBordersUp[0] = mpSkin->GetGfx(eGuiSkinGfx_ButtonUpBorderRight);
	mvGfxBordersUp[1] = mpSkin->GetGfx(eGuiSkinGfx_ButtonUpBorderLeft);
	mvGfxBordersUp[2] = mpSkin->GetGfx(eGuiSkinGfx_ButtonUpBorderUp);
	mvGfxBordersUp[3] = mpSkin->GetGfx(eGuiSkinGfx_ButtonUpBorderDown);

	mvGfxCornersUp[0] = mpSkin->GetGfx(eGuiSkinGfx_ButtonUpCornerLU);
	mvGfxCornersUp[1] = mpSkin->GetGfx(eGuiSkinGfx_ButtonUpCornerRU);
	mvGfxCornersUp[2] = mpSkin->GetGfx(eGuiSkinGfx_ButtonUpCornerRD);
	mvGfxCornersUp[3] = mpSkin->GetGfx(eGuiSkinGfx_ButtonUpCornerLD);

	/////////////////////////
	// Down
	mpGfxBackgroundDown = mpSkin->GetGfx(eGuiSkinGfx_ButtonDownBackground);

	mvGfxBordersDown[0] = mpSkin->GetGfx(eGuiSkinGfx_ButtonDownBorderRight);
	mvGfxBordersDown[1] = mpSkin->GetGfx(eGuiSkinGfx_ButtonDownBorderLeft);
	mvGfxBordersDown[2] = mpSkin->GetGfx(eGuiSkinGfx_ButtonDownBorderUp);
	mvGfxBordersDown[3] = mpSkin->GetGfx(eGuiSkinGfx_ButtonDownBorderDown);

	mvGfxCornersDown[0] = mpSkin->GetGfx(eGuiSkinGfx_ButtonDownCornerLU);
	mvGfxCornersDown[1] = mpSkin->GetGfx(eGuiSkinGfx_ButtonDownCornerRU);
	mvGfxCornersDown[2] = mpSkin->GetGfx(eGuiSkinGfx_ButtonDownCornerRD);
	mvGfxCornersDown[3] = mpSkin->GetGfx(eGuiSkinGfx_ButtonDownCornerLD);
}

//-----------------------------------------------------------------------

void cWidgetButton::OnDraw(float afTimeStep, cGuiClipRegion *apClipRegion) {
	cVector3f vOffset = 0;
	if (mbPressed)
		vOffset = mpSkin->GetAttribute(eGuiSkinAttribute_ButtonPressedContentOffset);

	////////////////////////////////
	// Image
	if (mpImage) {
		mpSet->DrawGfx(mpImage, GetGlobalPosition() +
									cVector3f(mvSize.x / 2 - mpImage->GetImageSize().x / 2,
											  mvSize.y / 2 - mpImage->GetImageSize().y / 2, 0.2f) +
									vOffset);
	}

	////////////////////////////////
	// Text
	if (IsEnabled()) {
		DrawDefaultText(msText, GetGlobalPosition() + cVector3f(mvSize.x / 2, mvSize.y / 2 - mvDefaultFontSize.y / 2, 0.5f) + vOffset,
						eFontAlign_Center);
	} else {
		DrawSkinText(msText, eGuiSkinFont_Disabled, GetGlobalPosition() + cVector3f(mvSize.x / 2, mvSize.y / 2 - mvDefaultFontSize.y / 2, 0.5f) + vOffset,
					 eFontAlign_Center);
	}

	////////////////////////////////
	// Borders and background
	if (mbPressed) {
		DrawBordersAndCorners(mpGfxBackgroundDown, mvGfxBordersDown, mvGfxCornersDown,
							  GetGlobalPosition(), mvSize);
	} else {
		DrawBordersAndCorners(mpGfxBackgroundUp, mvGfxBordersUp, mvGfxCornersUp,
							  GetGlobalPosition(), mvSize);
	}
}

//-----------------------------------------------------------------------

bool cWidgetButton::OnMouseMove(cGuiMessageData &aData) {
	return true;
}

//-----------------------------------------------------------------------

bool cWidgetButton::OnMouseDown(cGuiMessageData &aData) {
	mbPressed = true;
	return true;
}

//-----------------------------------------------------------------------

bool cWidgetButton::OnMouseUp(cGuiMessageData &aData) {
	if (GetMouseIsOver() == false)
		return false;

	if (mbPressed)
		ProcessMessage(eGuiMessage_ButtonPressed, aData);

	mbPressed = false;

	return true;
}

//-----------------------------------------------------------------------

bool cWidgetButton::OnMouseEnter(cGuiMessageData &aData) {
	return false;
}

//-----------------------------------------------------------------------

bool cWidgetButton::OnMouseLeave(cGuiMessageData &aData) {
	mbPressed = false;

	return false;
}

//-----------------------------------------------------------------------

} // namespace hpl