eGUI, a anmiated UI develop kit

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Introduction

eGUI is a windows GDI based UI developer kit, which implement a Widget based on UI framework and much usefully function of bitmap opeartion like transparent, rotate , moving, zooming, also it include a effeciently dirty area management machnism to help the devloper easily develop advanced application.

Background

The eGUI is from the idea of I want to develop a Chinese GO game, but I found it is hard to use the windows GDI to develop such application maybe involved much Bitmap operation, so I decide to develop a new GUI libary for this purpose.

Using the code

eGUI include below basic classes: CWidget: which is base class of each UI widget. CContainerWidget: which is the container will be used to hold and display all kinds of widget. CDisplayManager: which keep the windows draw context, and will be used to draw on the screen,and also implement the dirty area management. CFrameSurface: which is used to implement many kinds of draw opeation like, text drawing, bitmap drawing, transparent drawing,also it will be used as surface during the animating. CAnimateEngine: which implement a engine to trigger the surface drawing. CAnimateThread: each widget animation will be handled by a Thread. CAnimateController: each animation will mapped to a animate controller for the actually animation calculation.

1. define the root container and display manage.

<br>
	// will be used a a root container<br>
	CContainerWidget* m_pRootContainer;	<br>
        // will be used a CDisplayManager<br>
	CDisplayManage*  m_pDisplayManage;<br>

<br>
        //event listener<br>
	ModelListener m_animateListener;<br>
        //event listener handler<br>
	static  void HandleAnimateListener(void *pUserData, ModelEvent *pEvent);<br>

int CwidgetExampleDlg::IniteGui(void)<br>
{<br>

	   //Start the animate Engine<br>

		StartAnimateEngine(30);<br>

		//Init the animate listener<br>
		m_animateListener.pfnListener = HandleAnimateListener;<br>
		m_animateListener.pListenerData=this;<br>
		m_animateListener.bEnableEventHandle=true;<br>


		CRect wrc;<br>
		GetWindowRect(&wrc);<br>
		//Create Display Manager<br>
		this->m_pDisplayManage=new CDisplayManage(this->m_hWnd,wrc.Width(),wrc.Height());<br>
		//Create RootContainer<br>
		this->m_pRootContainer=new CContainerWidget();<br>
		//Register Container<br>
		m_pDisplayManage->RegisterRootContainer(m_pRootContainer);<br>
		//set displaymanger<br>
		m_pRootContainer->SetDisplayManage(this->m_pDisplayManage);<br>


		//Set the position of widget<br>
		WRect rootRc;<br>
		CRECT_TO_WRECT(wrc,rootRc);<br>
		rootRc.x=0;<br>
		rootRc.y=0;<br>
		m_pRootContainer->SetRect(&rootRc,false);<br>

		CBackGroundWidget* pBkW=new CBackGroundWidget();<br>

		//insert wiget to RootContainer,<br>
		WRect rc;<br>
		m_pRootContainer->GetRect(&rc);<br>
		rc.x=0;<br>
		rc.y=0;<br>
		m_pRootContainer->InsertWidget(pBkW,Z_ORDER_BACKGROUND);<br>
		pBkW->SetRect(&rc);<br>
	
		pBkW->SetBackgroundColor(0x0);<br>

	

		//Draw RootContainer<br>
		m_pRootContainer->InvalidateContent(0);<br>
	return 0;<br>
}<br>

BOOL CwidgetExampleDlg::PreTranslateMessage(MSG* pMsg)<br>
{<br>

		if(pMsg->message == WM_KEYDOWN )<br>
		{
			//(wParam), LOWORD(lParam), HIWORD(lParam)<br>
			WKEY_EVENT_T key_evt;<br>
			key_evt.key_code=pMsg->wParam;;<br>
			key_evt.rpt_cnt=LOWORD(pMsg->lParam);<br>
			key_evt.flag=HIWORD(pMsg->wParam);	<br>		
			m_pRootContainer->HandleEvent(KEY_EVENT_DOWN,(int)(&key_evt),0);		<br>
		}<br>

		if( pMsg->message ==WM_KEYUP)<br>
		{<br>
			WKEY_EVENT_T key_evt;<br>
			key_evt.key_code=pMsg->wParam;;<br>
			key_evt.rpt_cnt=LOWORD(pMsg->lParam);<br>
			key_evt.flag=HIWORD(pMsg->wParam);<br>
			m_pRootContainer->HandleEvent(KEY_EVENT_UP,(int)(&key_evt),0);		<br>
		}<br>

		if(pMsg->message==WM_LBUTTONUP)<br>
		{<br>
			WPoint ptScreen;<br>
			CPoint pt;<br>
			pt.x=pMsg->pt.x;<br>
			pt.y=pMsg->pt.y;<br>
			this->ScreenToClient(&pt);<br>
			ptScreen.x=pt.x;<br>
			ptScreen.y=pt.y;<br>
			m_pRootContainer->HandleEvent(MOUSE_LBUTTON_UP,(int)(&ptScreen),pMsg->lParam);			<br>
		}<br>

		
	...<br>
	return CDialog::PreTranslateMessage(pMsg);<br>
}<br>

void CwidgetExampleDlg::OnPaint() <br>
{<br>

	m_pRootContainer->InvalidateContent(0);<br>

}<br>

History

Initial version by XIAOWANG YANG

Reference

1. Daniel godson for his CEnBitmap implementation. 2.

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)