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Introduction
This tutorial is a step by step procedure for drawing an owner-drawn button control.This tutorial is about the redrawing the button control.
1.Open up the AppWizard and create a new project titled btncolor.Just create a basic dialog box without any document / view architecture.
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2.Then click on the ResourceVew tab in the 'Workspace' window. Proceed to edit the dialog box IDD_BTNCOLOR_DLG. It will already contain the Buttons 'Ok' and 'Cancel'. Delete the 'TODO :' message and cancel button.
3.Just drag n' drop the buttons needed, in this example 'color' . Then select and right click to edit their properties. The MFC keeps track of these buttons by their unique ID, a macro located in the "Resource.h" file. For code clarity, change the name of the ID to IDC_BUTTON_COLOR and modify the caption of the button.
4.Change the style of the push button to OwnerDraw.
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5.Now that our buttons and are in place we need to wire them into our application. We do this via the class wizard. (Control + W) Click on the Member Variables tab .
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6.Add the Message Map Entry WM_DRAWITEM for CBtnColorDlg.And Edit the code for OnDrawItem as shown below.
void CBtncolorDlg::OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct)
{
if(nIDCtl==IDC_BUTTON_COLOR)
{
CDC dc;
RECT rect;
dc.Attach(lpDrawItemStruct ->hDC);
rect = lpDrawItemStruct->rcItem;
dc.Draw3dRect(&rect,RGB(255,255,255),RGB(0,0,0));
dc.FillSolidRect(&rect,RGB(100,100,255));
UINT state=lpDrawItemStruct->itemState;
if((state & ODS_SELECTED))
{
dc.DrawEdge(&rect,EDGE_SUNKEN,BF_RECT);
}
else
{
dc.DrawEdge(&rect,EDGE_RAISED,BF_RECT);
}
dc.SetBkColor(RGB(100,100,255));
dc.SetTextColor(RGB(255,0,0));
TCHAR buffer[MAX_PATH];
ZeroMemory(buffer,MAX_PATH );
::GetWindowText(lpDrawItemStruct->hwndItem,buffer,MAX_PATH);
dc.DrawText(buffer,&rect,DT_CENTER|DT_VCENTER|DT_SINGLELINE);
dc.Detach();
}
CDialog::OnDrawItem(nIDCtl, lpDrawItemStruct);
}
That's it Build the Code and Run it.