// UniButton.cpp : implementation file
//
#include "stdafx.h"
#include "MySphereButton.h"
#include "UniButton.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CUniButton
CUniButton::CUniButton()
{
m_nColor = GetSysColor(COLOR_BTNFACE);
m_sColor = m_nColor;
m_hColor = m_nColor;
m_dColor = m_nColor;
m_nBorder = 1;
m_lfEscapement = 0;
m_pNormal = NULL;
m_pSelected = NULL;
m_pHover = NULL;
m_pDisabled = NULL;
m_hRgn = 0;
m_bHover = false;
m_bCapture = false;
m_bMouseDown = false;
m_bNeedBitmaps = true;
}
CUniButton::~CUniButton()
{
delete m_pNormal;
delete m_pSelected;
delete m_pHover;
delete m_pDisabled;
DeleteObject(m_hRgn);
}
BEGIN_MESSAGE_MAP(CUniButton, CButton)
//{{AFX_MSG_MAP(CUniButton)
ON_WM_ERASEBKGND()
ON_WM_MOUSEMOVE()
ON_WM_CREATE()
ON_WM_LBUTTONDOWN()
ON_WM_LBUTTONUP()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CUniButton message handlers
BOOL CUniButton::Create(LPCTSTR lpszCaption, DWORD dwStyle, const CPoint point, const HRGN hRgn, CWnd* pParentWnd, UINT nID)
{
// store region in member variable
DeleteObject(m_hRgn);
m_hRgn = CreateRectRgn(0, 0, 31, 31);
CRect box(0, 0, 0, 0);
if (m_hRgn != 0)
CombineRgn(m_hRgn, hRgn, 0, RGN_COPY);
// make sure that region bounding rect is located in (0, 0)
GetRgnBox(m_hRgn, &box);
OffsetRgn(m_hRgn, -box.left, -box.top);
GetRgnBox(m_hRgn, &box);
// update position of region center for caption output
m_CenterPoint = CPoint(box.left + box.Width() /2 , box.top + box.Height() /2);
box.OffsetRect(point);
return CButton::Create(lpszCaption, dwStyle, box, pParentWnd, nID);
}
BOOL CUniButton::Create(LPCTSTR lpszCaption, DWORD dwStyle, const CPoint point, const HRGN hRgn, CWnd* pParentWnd, UINT nID, COLORREF color)
{
m_sColor = color;
m_hColor = color;
// call another constructor
return Create(lpszCaption, dwStyle, point, hRgn, pParentWnd, nID);
}
BOOL CUniButton::Create(LPCTSTR lpszCaption, DWORD dwStyle, const CPoint point, const HRGN hRgn, CWnd* pParentWnd, UINT nID, UINT nBorder, LONG lfEscapement, COLORREF nColor, COLORREF sColor, COLORREF hColor, COLORREF dColor)
{
m_lfEscapement = lfEscapement;
return Create(lpszCaption, dwStyle, point, hRgn, pParentWnd, nID, nBorder, nColor, sColor, hColor, dColor);
}
BOOL CUniButton::Create(LPCTSTR lpszCaption, DWORD dwStyle, const CPoint point, const HRGN hRgn, CWnd* pParentWnd, UINT nID, UINT nBorder, COLORREF nColor, COLORREF sColor, COLORREF hColor, COLORREF dColor)
{
// change default colors
m_nBorder = nBorder;
m_nColor = nColor;
m_sColor = sColor;
m_hColor = hColor;
m_dColor = dColor;
// call another constructor
return Create(lpszCaption, dwStyle, point, hRgn, pParentWnd, nID);
}
void CUniButton::PreSubclassWindow()
{
// change window style to allow owner draw
ModifyStyle(0, BS_OWNERDRAW | BS_PUSHBUTTON);
CButton::PreSubclassWindow();
}
int CUniButton::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CButton::OnCreate(lpCreateStruct) == -1)
return -1;
// assign new region to a window
m_bNeedBitmaps = true;
SetWindowRgn(m_hRgn, true);
return 0;
}
void CUniButton::OnLButtonDown(UINT nFlags, CPoint point)
{
// record that mouse is down
m_bMouseDown = true;
if (!m_bCapture) {
SetCapture();
m_bCapture = true;
}
CButton::OnLButtonDown(nFlags, point);
}
void CUniButton::OnLButtonUp(UINT nFlags, CPoint point)
{
// record that mouse is released
CButton::OnLButtonUp(nFlags, point);
m_bMouseDown = false;
if (m_bCapture) {
ReleaseCapture();
m_bCapture = false;
}
CheckHover(point);
}
void CUniButton::OnMouseMove(UINT nFlags, CPoint point)
{
// Test if mouse is above the button.
if (!m_bMouseDown)
CheckHover(point);
CButton::OnMouseMove(nFlags, point);
}
void CUniButton::CheckHover(CPoint point)
{
if (HitTest(point)) {
if (!m_bCapture) {
SetCapture();
m_bCapture = true;
}
if (!m_bHover) {
m_bHover = true;
RedrawWindow();
}
}
else {
if (m_bCapture) {
ReleaseCapture();
m_bCapture = false;
}
m_bHover = false;
RedrawWindow();
}
}
LRESULT CUniButton::DefWindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{
// I have noticed that default windows buttons can be clicked very quickly.
// Double or single click both result in a button being pushed down.
// For owner drawn buttons this is not the case. Double click does
// not push button down. Here is a solution for the problem:
// double click message is substituted for single click.
if (message == WM_LBUTTONDBLCLK)
message = WM_LBUTTONDOWN;
return CButton::DefWindowProc(message, wParam, lParam);
}
BOOL CUniButton::HitTest(CPoint point)
{
BOOL result = false;
// Obtain handle to window region.
HRGN hRgn = CreateRectRgn(0, 0, 0, 0);
GetWindowRgn(hRgn);
CRect rgnRect;
GetRgnBox(hRgn, &rgnRect);
// First check if point is in region bounding rect.
// Then check if point is in the region in adition to being in the bouding rect.
result = PtInRect(&rgnRect, point) && PtInRegion(hRgn, point.x, point.y);
// Clean up and exit.
DeleteObject(hRgn);
return result;
}
BOOL CUniButton::OnEraseBkgnd(CDC* pDC)
{
// do not erase background
return 1;
}
//////////////////////// DRAWING ROUTINES ////////////////////////////
void CUniButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
// prepare DC
CDC* pDC = CDC::FromHandle(lpDrawItemStruct -> hDC);
CRect rect;
GetClientRect(rect);
// prepare bitmaps they need to be prepared
if (m_bNeedBitmaps)
PrepareStateBitmaps(pDC, &rect);
// draw button to the screen
DrawButton(pDC, &rect, lpDrawItemStruct -> itemState);
}
void CUniButton::PrepareStateBitmaps(CDC * pDC, CRect * pRect)
{
// prepare memory DC
CDC * pMemDC;
pMemDC = new CDC;
pMemDC -> CreateCompatibleDC(pDC);
// prepare bitmaps for all button states and for the mask
PrepareNormalState(pDC, pMemDC, pRect);
PrepareSelectedState(pDC, pMemDC, pRect);
PrepareHoverState(pDC, pMemDC, pRect);
PrepareDisabledState(pDC, pMemDC, pRect);
// clean up
delete pMemDC;
m_bNeedBitmaps = false;
}
void CUniButton::PrepareNormalState(CDC * pDC, CDC * pMemDC, CRect * pRect)
{
// prepare MYBS_NORMAL state bitmap
delete m_pNormal;
m_pNormal = new CBitmap;
PaintRgn(pDC, pMemDC, m_pNormal, m_nColor, pRect, true, false);
}
void CUniButton::PrepareSelectedState(CDC * pDC, CDC * pMemDC, CRect * pRect)
{
// prepare MYBS_SELECTED state bitmap
delete m_pSelected;
m_pSelected = new CBitmap;
PaintRgn(pDC, pMemDC, m_pSelected, m_sColor, pRect, true, true);
}
void CUniButton::PrepareHoverState(CDC * pDC, CDC * pMemDC, CRect * pRect)
{
// prepare MYBS_HOVER state bitmap
delete m_pHover;
m_pHover = new CBitmap;
PaintRgn(pDC, pMemDC, m_pHover, m_hColor, pRect, true, false);
}
void CUniButton::PrepareDisabledState(CDC * pDC, CDC * pMemDC, CRect * pRect)
{
// prepare MYBS_DISABLED state bitmap
delete m_pDisabled;
m_pDisabled = new CBitmap;
PaintRgn(pDC, pMemDC, m_pDisabled, m_dColor, pRect, false, false);
}
void CUniButton::PaintRgn(CDC * pDC, CDC * pMemDC, CBitmap * pBitmap, COLORREF color, CRect * pRect, BOOL bEnabled, BOOL bSunken)
{
// create bitmap
pBitmap -> CreateCompatibleBitmap(pDC, pRect -> Width(), pRect -> Height());
CBitmap * pOldBitmap = pMemDC -> SelectObject(pBitmap);
// prepare region
HRGN hRgn = CreateRectRgn(0, 0, 0, 0);
GetWindowRgn(hRgn);
// fill rect a with transparent color and fill rgn
HBRUSH hBrush = CreateSolidBrush(color);
pMemDC -> FillSolidRect(pRect, RGB(0, 0, 0));
FillRgn(pMemDC -> GetSafeHdc(), hRgn, hBrush);
DeleteObject(hBrush);
// draw 3D border and text
DrawButtonCaption(pMemDC -> GetSafeHdc(), pRect, bEnabled, bSunken);
FrameRgn3D(pMemDC -> GetSafeHdc(), hRgn, bSunken);
// clean up
DeleteObject(hRgn);
pMemDC -> SelectObject(pOldBitmap);
}
void CUniButton::DrawButtonCaption(HDC hDC, CRect * pRect, BOOL bEnabled, BOOL bSunken)
{
// select parent font
int nOldMode = SetBkMode(hDC, TRANSPARENT);
CString text;
GetWindowText(text);
LOGFONT lf;
GetParent() -> GetFont() -> GetLogFont(&lf);
HFONT hFont = CreateFontIndirect(&lf);
HFONT hOldFont = (HFONT) SelectObject(hDC, hFont);
// determine point where to output text
TEXTMETRIC tm;
GetTextMetrics(hDC, &tm);
CPoint p = CPoint(m_CenterPoint.x, m_CenterPoint.y + tm.tmHeight/ 2);
if (bSunken)
p.Offset(m_nBorder, m_nBorder);
// draw button caption depending upon button state
if (bEnabled) {
SetTextColor(hDC, GetSysColor(COLOR_BTNTEXT));
SetTextAlign(hDC, TA_CENTER | TA_BOTTOM);
TextOut(hDC, p.x, p.y, text, text.GetLength());
}
else {
SetTextColor(hDC, GetSysColor(COLOR_3DHILIGHT));
TextOut(hDC, p.x + 1, p.y + 1, text, text.GetLength());
SetTextColor(hDC, GetSysColor(COLOR_3DSHADOW));
TextOut(hDC, p.x, p.y, text, text.GetLength());
}
SelectObject(hDC, hOldFont);
DeleteObject(hFont);
SetBkMode(hDC, nOldMode);
}
void CUniButton::FrameRgn3D(HDC hDC, const HRGN hRgn, BOOL bSunken)
{
// we need two differenr regions to keep base region and border region
HBRUSH hBrush;
HRGN hBaseRgn = CreateRectRgn(0, 0, 0, 0);
COLORREF ltOuter, ltInner, rbOuter, rbInner; // colors of inner and outer shadow for top-left and right-bottom corners
// decide on color scheme
if (!bSunken) {
ltOuter = GetSysColor(COLOR_3DLIGHT);
ltInner = GetSysColor(COLOR_3DHILIGHT);
rbOuter = GetSysColor(COLOR_3DDKSHADOW);
rbInner = GetSysColor(COLOR_3DSHADOW);
}
else {
rbInner = GetSysColor(COLOR_3DLIGHT);
rbOuter = GetSysColor(COLOR_3DHILIGHT);
ltInner = GetSysColor(COLOR_3DDKSHADOW);
ltOuter = GetSysColor(COLOR_3DSHADOW);
}
// offset highlight and shadow regions
// substract them from the base region
switch (m_nBorder)
{
case 2:
CombineRgn(hBaseRgn, hRgn, 0, RGN_COPY);
OffsetRgn(hBaseRgn, 2, 2);
CombineRgn(hBaseRgn, hRgn, hBaseRgn, RGN_DIFF);
hBrush = CreateSolidBrush(ltInner);
FillRgn(hDC, hBaseRgn, hBrush);
DeleteObject(hBrush);
CombineRgn(hBaseRgn, hRgn, 0, RGN_COPY);
OffsetRgn(hBaseRgn, -2, -2);
CombineRgn(hBaseRgn, hRgn, hBaseRgn, RGN_DIFF);
hBrush = CreateSolidBrush(rbInner);
FillRgn(hDC, hBaseRgn, hBrush);
DeleteObject(hBrush);
CombineRgn(hBaseRgn, hRgn, 0, RGN_COPY);
OffsetRgn(hBaseRgn, 1, 1);
CombineRgn(hBaseRgn, hRgn, hBaseRgn, RGN_DIFF);
hBrush = CreateSolidBrush(ltOuter);
FillRgn(hDC, hBaseRgn, hBrush);
DeleteObject(hBrush);
CombineRgn(hBaseRgn, hRgn, 0, RGN_COPY);
OffsetRgn(hBaseRgn, -1, -1);
CombineRgn(hBaseRgn, hRgn, hBaseRgn, RGN_DIFF);
hBrush = CreateSolidBrush(rbOuter);
FillRgn(hDC, hBaseRgn, hBrush);
DeleteObject(hBrush);
break;
default:
CombineRgn(hBaseRgn, hRgn, 0, RGN_COPY);
OffsetRgn(hBaseRgn, 1, 1);
CombineRgn(hBaseRgn, hRgn, hBaseRgn, RGN_DIFF);
hBrush = CreateSolidBrush(ltInner);
FillRgn(hDC, hBaseRgn, hBrush);
DeleteObject(hBrush);
CombineRgn(hBaseRgn, hRgn, 0, RGN_COPY);
OffsetRgn(hBaseRgn, -1, -1);
CombineRgn(hBaseRgn, hRgn, hBaseRgn, RGN_DIFF);
hBrush = CreateSolidBrush(rbOuter);
FillRgn(hDC, hBaseRgn, hBrush);
DeleteObject(hBrush);
break;
}
// clean up regions
DeleteObject(hBaseRgn);
}
void CUniButton::DrawButton(CDC * pDC, CRect * pRect, UINT state)
{
// create memory DC
CDC * pMemDC = new CDC;
pMemDC -> CreateCompatibleDC(pDC);
CBitmap * pOldBitmap;
// get region
HRGN hRgn = CreateRectRgn(0, 0, 0, 0);
GetWindowRgn(hRgn);
// select bitmap to paint depending upon button state
if (state & ODS_DISABLED)
pOldBitmap = pMemDC -> SelectObject(m_pDisabled);
else {
if (state & ODS_SELECTED)
pOldBitmap = pMemDC -> SelectObject(m_pSelected);
else {
if (m_bHover)
pOldBitmap = pMemDC -> SelectObject(m_pHover);
else
pOldBitmap = pMemDC -> SelectObject(m_pNormal);
}
}
// paint using region for clipping
::SelectClipRgn(pDC -> GetSafeHdc(), hRgn);
pDC -> BitBlt(0, 0, pRect -> Width(), pRect -> Height(), pMemDC, 0, 0, SRCCOPY);
::SelectClipRgn(pDC -> GetSafeHdc(), NULL);
// clean up
DeleteObject(hRgn);
pMemDC -> SelectObject(pOldBitmap);
delete pMemDC;
}
void CUniButton::RgnPixelWork(CDC * pDC, CRgn * pRgn)
{
// get size of data composing region
int size = pRgn -> GetRegionData(NULL, 0);
HANDLE hData = GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT, size);
RGNDATA * pData = (RGNDATA *)GlobalLock(hData);
// retrieve region data
int res = pRgn -> GetRegionData(pData, size);
RECT * pRect = (RECT *) pData -> Buffer;
// now we know how region is represented and we are able to manipulate it as we like
for (DWORD i = 0; i < pData -> rdh.nCount; i++) {
RECT rect = *(pRect + i);
for (int x = rect.left; x < rect.right; x++)
for (int y = rect.top; y < rect.bottom; y++) {
// use SetPixel(x, y, color) to do pixel work
}
}
// free region data
GlobalUnlock(hData);
GlobalFree(hData);
}
