Q115306: HOWTO: How to Get the Current State of a Button in a CToolbar
Article: Q115306
Product(s): Microsoft C Compiler
Version(s): winnt:2.0,2.1,4.0
Operating System(s):
Keyword(s): kbMFC kbToolbar KbUIDesign kbVC kbVC100 kbVC200 kbVC400 kbGrpDSMFCATL
Last Modified: 07-MAY-2001
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The information in this article applies to:
- The Microsoft Foundation Classes (MFC), used with:
- Microsoft Visual C++ for Windows, 16-bit edition, versions 1.0, 1.5, 1.51, 1.52
- Microsoft Visual C++, 32-bit Editions, versions 2.0, 2.1, 4.0
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SUMMARY
=======
Although the Microsoft Foundation Classes (MFC) offer a useful and easy method
of keeping the state of a menu command and/or toolbar button in a CControlBar
tied together, there is no easy means of finding out the command's or button's
current state.
MORE INFORMATION
================
To find the current state of a menu command or toolbar button in a
CControlBar-derived class, use the following piece of code:
UINT iButtonID;
UINT iButtonStyle;
int iButtonImage;
// If the Toolbar is not based upon the default "AFX_IDW_TOOLBAR"
// constant, then replace its use with the valid Toolbar constant.
// If the following line is used from the Frame Window remove
//"GetParentFrame()->":
CToolBar* pBar =
(CToolBar*)GetParentFrame()->GetDescendantWindow(AFX_IDW_TOOLBAR);
// If this code sample is called from an AppWizard generated,
// Frame Window member function in Visual C++ 4.0, replace the above
// statement with the following. Recall that the CMDIFrameWnd-derived
// Frame Window generated by AppWizard has a CToolBar m_wndToolBar
// member.
CToolBar* pBar = &m_wndToolBar;
if (pBar != NULL) {
// Use the relevant Button ID for the following line:
int iButtonIndex = pBar->CommandToIndex(ID_MY_BUTTON);
pBar->GetButtonInfo(iButtonIndex, iButtonID, iButtonStyle,
iButtonImage);
// The following code checks for all possible states.
// In practice, check only for those states that you need.
if (iButtonStyle & TBBS_PRESSED)
// Button Down
else
if (iButtonStyle & (TBBS_CHECKED & TBBS_DISABLED))
// Button Down & Unavailable
else
if (iButtonStyle & TBBS_DISABLED)
// Button Disabled
else
if (iButtonStyle & TBBS_INDETERMINATE)
// Button State Indeterminate
else
if (iButtonStyle & TBBS_CHECKED)
// Button Checked
else
// Button Up & Enabled
}
Additional query words: 1.00 1.50 2.00 2.10 2.50 2.51 2.52 3.00 3.10 4.00 kbinf kbVC1500
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Keywords : kbMFC kbToolbar KbUIDesign kbVC kbVC100 kbVC200 kbVC400 kbGrpDSMFCATL
Technology : kbAudDeveloper kbMFC
Version : winnt:2.0,2.1,4.0
Issue type : kbhowto
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