Bitmap on Controls
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Hi all, I'm currently loading a circular image onto a CBitmapButton which has the outside area of the bitmap coloured the same as the dialog so that the user is fooled into thinking it's a circular button. However the problem I have is that the user can still click on the part of the button that is outside of the circular bitmap. One solution I found was when the button is clicked, get the mouse position and if it is outside of the circle then ignore the click, however and this is the tricky part, the button has two bitmaps associated to it (down and up) and these get processed before the ON_BN_CLICK event so the bitmap changes temporarily. Here's what I want to happen:
User presses left mouse button down
Check that mouse pos is within circle
If mouse is within circle
load 'down' bitmapUser releases left mouse button
if mouse is within circle
load 'up' bitmap
do some clever stuff :laugh:
if conditions are met
load 'selected' bitmapLooking at the button methods the only suitable one is the ON_BN_CLICK event but not a WM_LBUTTONDOWN event like on the dialog. Does anyone have any ideas on how to do this? This is getting developed within Studio 2003 and is a Dialog based MFC app. cheers, Andy
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Hi all, I'm currently loading a circular image onto a CBitmapButton which has the outside area of the bitmap coloured the same as the dialog so that the user is fooled into thinking it's a circular button. However the problem I have is that the user can still click on the part of the button that is outside of the circular bitmap. One solution I found was when the button is clicked, get the mouse position and if it is outside of the circle then ignore the click, however and this is the tricky part, the button has two bitmaps associated to it (down and up) and these get processed before the ON_BN_CLICK event so the bitmap changes temporarily. Here's what I want to happen:
User presses left mouse button down
Check that mouse pos is within circle
If mouse is within circle
load 'down' bitmapUser releases left mouse button
if mouse is within circle
load 'up' bitmap
do some clever stuff :laugh:
if conditions are met
load 'selected' bitmapLooking at the button methods the only suitable one is the ON_BN_CLICK event but not a WM_LBUTTONDOWN event like on the dialog. Does anyone have any ideas on how to do this? This is getting developed within Studio 2003 and is a Dialog based MFC app. cheers, Andy
There are several code project articles on irregularly shaped buttons. In general, SetWindowRgn is the Win SDK call you use to give any window (for example a button) an irregular shape. SetWindowRgn is acessible somehow through MFC, or if you're using managed code, thorugh that as well, I presume.
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There are several code project articles on irregularly shaped buttons. In general, SetWindowRgn is the Win SDK call you use to give any window (for example a button) an irregular shape. SetWindowRgn is acessible somehow through MFC, or if you're using managed code, thorugh that as well, I presume.
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cheers, you were right, all I needed was:
HRGN rgn ;
m_MyButton.GetClientRect ( &button_rect ) ;
rgn = CreateEllipticRgn( 0, 0,
button_rect.Width(), button_rect.Height() );int ret_val = m_MyButton.SetWindowRgn(rgn, true);
Andy,
So does your (round) bitmap touch the four sides of the bounding rectangle? What if your bitmap was an oval instead? Would
CreateEllipticRgn()still work?
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