caption.cpp

3D reconstruction, medical image processing from colons, using intel image processing for based clas

////////////////////////////////////////////////////////////////
//
// class RxCaption
//
// Generic caption painter. Handles WM_NCPAINT, WM_NCACTIVATE, etc. to
// handle drawing custom captions. To use it:
//
// - call Install from your frame's OnCreate function. 
// - Set a custom CaptionBackground if desired
// - Set custom TextAttributes if required
//
//	 Derive from this class for custom caption layouts.
// 
//   If you are drawing custom caption buttons, you must handle WM_NCLBUTTONDOWN & co.
//   yourself. CCaption does not handle the mouse for custom caption buttons. 
//
//	Author: Dave Lorde	([e-mail])
//
//          Copyright 1999
//
//			- based on a 1997 Microsoft Systems Journal
//            C++ Q&A article by Paul DiLascia. 
//
////////////////////////////////////////////////////////////////
//

#include "StdAfx.h"
#include "Caption.h"
#include "SuppressStyle.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

IMPLEMENT_DYNAMIC(RxCaption, RxSubclassWnd);

////////
// Default Constructor 
//
RxCaption::RxCaption()
{
	m_crMask			= RGB(255,  0,  0);
	m_crActive			= RGB(132,126,125);
	m_crInactive		= RGB( 62, 56, 55);

	m_crActiveText		= -1;
	m_crInactiveText	= -1;

	Invalidate();
}

RxCaption::~RxCaption()
{
}

//////////////////
// Install caption handler. 
//
BOOL RxCaption::Install(CFrameWnd* pFrameWnd)
{
	ASSERT_KINDOF(CFrameWnd, pFrameWnd);

	return HookWindow(pFrameWnd);
}

/////////////////
// Regenerate and display caption
//
void RxCaption::Refresh()
{
	Invalidate();
	PaintCaption();
}

//////////////////
// Ensure caption bitmaps are repainted	next time through OnNcPaint()
//
void RxCaption::Invalidate() 
{ 
	m_szCaption = CSize(0,0); 
}

//////////////////
// Message handler handles caption-related messages
//
LRESULT RxCaption::WindowProc(UINT msg, WPARAM wp, LPARAM lp)
{
	switch (msg) 
	{
		case WM_NCPAINT:
			OnNcPaint(HRGN(wp));
			return 0;

		case WM_NCACTIVATE:
			return OnNcActivate(wp);

		case WM_SETTEXT:
			OnSetText((LPCTSTR)lp);
			return 0;

		case WM_SYSCOLORCHANGE:
		case WM_SETTINGCHANGE:
			OnColorChange();
			return 0;
	}

	// We don't handle it: pass along
	return RxSubclassWnd::WindowProc(msg, wp, lp);
}

/////////////////
// Handle WM_NCPAINT for main window
//
void RxCaption::OnNcPaint(HRGN hRgn)
{
	ASSERT_VALID(m_pWndHooked);
	CWnd& wnd = *m_pWndHooked;

	CRect	rcCaption = GetCaptionRect();		// caption rectangle in window coords
	CRect	rcWindow;					
	CRect	rcButton;
	wnd.GetWindowRect(&rcWindow);				// .. get window rect
	rcCaption += rcWindow.TopLeft();			// convert caption rect to screen coords

	// Don't bother painting if the caption doesn't lie within the region.
	//
	if ((WORD)hRgn > 1 && !::RectInRegion(hRgn, &rcCaption)) 
	{
		Default();								// just do default thing
		return;									// and quit
	}

	DWORD		dwStyle = wnd.GetStyle();

	// Exclude caption from update region
	//
	HRGN hRgnCaption = ::CreateRectRgnIndirect(&rcCaption);
	HRGN hRgnNew     = ::CreateRectRgnIndirect(&rcCaption);
	HRGN hRgnButton;

	// wParam is not a valid region: create one that's the whole
	// window minus the caption bar
	//
	HRGN hRgnAll = ::CreateRectRgnIndirect(&rcWindow);
	CombineRgn(hRgnNew, hRgnAll, hRgnCaption, RGN_DIFF);
	DeleteObject(hRgnAll);

	int cxIcon = GetSystemMetrics(SM_CXSIZE);
	int cyIcon = GetSystemMetrics(SM_CYSIZE);

	if(cxIcon >= 25)
	{
		// window XP style
		if(dwStyle & WS_SYSMENU)
		{
			rcButton.left = rcCaption.left;
			rcButton.top  = rcCaption.top;
			rcButton.right  = rcButton.left + cxIcon;
			rcButton.bottom = rcButton.top  + cyIcon;
			rcButton.DeflateRect(2, 1, 0, 1);

			hRgnButton = ::CreateRectRgnIndirect(&rcButton);
			CombineRgn(hRgnNew, hRgnNew, hRgnButton, RGN_OR);
			DeleteObject(hRgnButton);

			//////////////
			// Close box has a 2 pixel border on all sides but left, which is zero
			//
			rcButton.left = rcCaption.left + (rcCaption.Width() - (cxIcon-2));
			rcButton.top  = rcCaption.top;
			rcButton.right  = rcButton.left + (cxIcon-4);
			rcButton.bottom = rcButton.top  + cyIcon;
			rcButton.DeflateRect(0, 2, 0, 2);

			hRgnButton = ::CreateRectRgnIndirect(&rcButton);
			CombineRgn(hRgnNew, hRgnNew, hRgnButton, RGN_OR);
			DeleteObject(hRgnButton);
		}

		//////////////
		// Max/restore button is like close box; just shift rectangle left
		// Also does help button, if any.
		//
		if((dwStyle & WS_MAXIMIZEBOX) || (wnd.GetExStyle() & WS_EX_CONTEXTHELP))
		{
			rcButton.left = rcCaption.left + (rcCaption.Width() - (cxIcon-2)*2);
			rcButton.top  = rcCaption.top;
			rcButton.right  = rcButton.left + (cxIcon-4);
			rcButton.bottom = rcButton.top  + cyIcon;
			rcButton.DeflateRect(0, 2, 0, 2);

			hRgnButton = ::CreateRectRgnIndirect(&rcButton);
			CombineRgn(hRgnNew, hRgnNew, hRgnButton, RGN_OR);
			DeleteObject(hRgnButton);
		}

		///////////////
		// Minimize button has 2 pixel border on all sides but right.
		//
		if (dwStyle & WS_MINIMIZEBOX)
		{
			rcButton.left = rcCaption.left + (rcCaption.Width() - (cxIcon-2)*3);
			rcButton.top  = rcCaption.top;
			rcButton.right  = rcButton.left + (cxIcon-4);
			rcButton.bottom = rcButton.top  + cyIcon;
			rcButton.DeflateRect(0, 2, 0, 2);

			hRgnButton = ::CreateRectRgnIndirect(&rcButton);
			CombineRgn(hRgnNew, hRgnNew, hRgnButton, RGN_OR);
			DeleteObject(hRgnButton);
		}
	}
	else
	{
		//////////////
		// Within the basic button rectangle, Windows 95 uses a 1 or 2 pixel border
		// Icon has 2 pixel border on left, 1 pixel on top/bottom, 0 right
		//
		if(dwStyle & WS_SYSMENU)
		{
			rcButton.left = rcCaption.left;
			rcButton.top  = rcCaption.top;
			rcButton.right  = rcButton.left + cxIcon;
			rcButton.bottom = rcButton.top  + cyIcon;
			rcButton.DeflateRect(2, 1, 0, 1);

			hRgnButton = ::CreateRectRgnIndirect(&rcButton);
			CombineRgn(hRgnNew, hRgnNew, hRgnButton, RGN_OR);
			DeleteObject(hRgnButton);

			//////////////
			// Close box has a 2 pixel border on all sides but left, which is zero
			//
			rcButton.left = rcCaption.left + (rcCaption.Width() - cxIcon);
			rcButton.top  = rcCaption.top;
			rcButton.right  = rcButton.left + cxIcon;
			rcButton.bottom = rcButton.top  + cyIcon;
			rcButton.DeflateRect(0, 2, 2, 2);

			hRgnButton = ::CreateRectRgnIndirect(&rcButton);
			CombineRgn(hRgnNew, hRgnNew, hRgnButton, RGN_OR);
			DeleteObject(hRgnButton);
		}

		//////////////
		// Max/restore button is like close box; just shift rectangle left
		// Also does help button, if any.
		//
		if((dwStyle & WS_MAXIMIZEBOX) || (wnd.GetExStyle() & WS_EX_CONTEXTHELP))
		{
			rcButton.left = rcCaption.left + (rcCaption.Width() - cxIcon*2);
			rcButton.top  = rcCaption.top;
			rcButton.right  = rcButton.left + cxIcon;
			rcButton.bottom = rcButton.top  + cyIcon;
			rcButton.DeflateRect(0, 2, 2, 2);

			hRgnButton = ::CreateRectRgnIndirect(&rcButton);
			CombineRgn(hRgnNew, hRgnNew, hRgnButton, RGN_OR);
			DeleteObject(hRgnButton);
		}

		///////////////
		// Minimize button has 2 pixel border on all sides but right.
		//
		if (dwStyle & WS_MINIMIZEBOX)
		{
			rcButton.left = rcCaption.left + (rcCaption.Width() - cxIcon*3);
			rcButton.top  = rcCaption.top;
			rcButton.right  = rcButton.left + cxIcon;
			rcButton.bottom = rcButton.top  + cyIcon;
			rcButton.DeflateRect(2, 2, 0, 2);

			hRgnButton = ::CreateRectRgnIndirect(&rcButton);
			CombineRgn(hRgnNew, hRgnNew, hRgnButton, RGN_OR);
			DeleteObject(hRgnButton);
		}
	}

	// Call Windows to do WM_NCPAINT with altered update region
	//
	MSG& msg = AfxGetThreadState()->m_lastSentMsg;
	WPARAM savewp = msg.wParam;		// save original wParam
	msg.wParam = (WPARAM)hRgnNew;	// set new region for DefWindowProc

	Default();						// Normal message handling

	DeleteObject(hRgnCaption);		// clean up
	DeleteObject(hRgnNew);			// ...
	msg.wParam = savewp;			// restore original wParam

	PaintCaption();					// Now paint our special caption
}

//////////////////
// Handle WM_NCACTIVATE for main window
//
BOOL RxCaption::OnNcActivate(BOOL bActive)
{
	ASSERT_VALID(m_pWndHooked);
	CFrameWnd& frame = *((CFrameWnd*)m_pWndHooked);
	ASSERT_KINDOF(CFrameWnd, &frame);

	// Mimic MFC kludge to stay active if WF_STAYACTIVE bit is on
	//
	if (frame.m_nFlags & WF_STAYACTIVE)
		bActive = TRUE;

	if (!frame.IsWindowEnabled())			// but not if disabled
		bActive = FALSE;

	if (bActive == m_bActive)
		return TRUE;						// nothing to do

	// In case this is a MDI app, manually activate/paint active MDI child
	// window, because Windows won't do it if parent frame is invisible.
	// Must do this BEFORE calling Default, or it will not work.
	//
	CFrameWnd* pActiveFrame = frame.GetActiveFrame();

	if (pActiveFrame != &frame) 
	{		
		pActiveFrame->SendMessage(WM_NCACTIVATE, bActive);
		pActiveFrame->SendMessage(WM_NCPAINT);
	}

	// Turn WS_VISIBLE off before calling DefWindowProc,
	// so DefWindowProc won't paint and thereby cause flicker.
	//
	{
		RxSuppressStyle ss(frame.GetSafeHwnd(), WS_VISIBLE);

		MSG& msg = AfxGetThreadState()->m_lastSentMsg;
		msg.wParam = bActive;

		Default();						// Normal message handling
	}
	// At this point, nothing has happened (since WS_VISIBLE was off).
	// Now it's time to paint.
	//
	m_bActive = bActive;				// update state
	frame.SendMessage(WM_NCPAINT);		// paint non-client area (frame too)

	return TRUE;						// done OK
}

//////////////////
// Handle WM_SETTEXT for main window
//
void RxCaption::OnSetText(LPCTSTR)
{
	ASSERT_VALID(m_pWndHooked);
	CWnd& wnd = *m_pWndHooked;

	// Turn WS_VISIBLE style off before calling Windows to
	// set the text. Reset to visible afterwards
	{