What can or cannot you do in ::OnInitDialog()
Visual Studio 2008 C++
I would like to write out some text on the dialog at the dialog startup. If I put the same code in a PUSH-BUTTON OnBnClicked it works. If I put it in the OnInit, it does not give me the text on the screen. I'm assuming at the OnInit, my dialog box is not completely up, so I cannot write on it?
CRect drawRect;
drawRect.left = 00; // Shifts text to right
drawRect.right = 300;
drawRect.top = 00; // How Far Down
drawRect.bottom = 300;
// Clear out any previous name
CString strBlank = "Book Name";
SSTextOut(this->GetDC(), strBlank, &drawRect, DT_LEFT);
The function I am writing to is described in
http://www.codeproject.com/KB/GDI/SSTextOut.aspx
You can't use the function SSTextOut() in OnInitDialog(). OnInitDialog() is called before your dialog is displayed, so you can't get a valid CDC inside of it (because the dialog hasn't been drawn yet).
From the looks of it, SSTextOut() is meant to be called from an OnPaint() override.
Related
I am not sure if this is an issue that can be resolved with coding or is by design. I am running the latest version of Windows 11 with all updates. And my application is a MFC dialog application built with Visual Studio 2022.
My application uses a CHtmlView control and the user can trigger a Print Preview. This event will trigger the following code:
void CChristianLifeMinistryHtmlView::DoPrintPreview()
{
ExecWB(OLECMDID_PRINTPREVIEW, OLECMDEXECOPT_PROMPTUSER, nullptr, nullptr);
HWND HWND_PP = nullptr ;
const auto t1 = ::GetTickCount64();
auto t2 = ::GetTickCount64(); // Extra line required for 'while' rearrangement.
while (HWND_PP == nullptr && t2 - t1 <= 6000) // if found or Timeout reached...
{
HWND HWND_FG = ::GetForegroundWindow(); // Get the ForeGroundWindow
if (HWND_FG != nullptr)
{
TCHAR szClassName[256]{} ;
::GetClassName(HWND_FG, &szClassName[0], 256);
if (lstrcmp(&szClassName[0], IE_PPREVIEWCLASS) == 0) // Check for Print Preview Dialog
HWND_PP = HWND_FG ;
}
theApp.PumpMessage();
t2 = ::GetTickCount64();
}
if (HWND_PP != nullptr)
{
RECT workArea{};
::SystemParametersInfo( SPI_GETWORKAREA, 0, &workArea, 0 );
::MoveWindow(HWND_PP, workArea.left, workArea.top,
workArea.right - workArea.left, workArea.bottom - workArea.top, TRUE);
}
}
This code works fine, and I get a good print preview, resized to the display. For example:
Now, if I hit Print from here it displays:
Opting to print to PDF looks the same:
Prior to the recent Windows 11 Updates these latter "print dialogs" looked different with no preview anyway. But since this updated version of the system "print dialog" can cope with a preview, is there no way to get our existing CHtmlView preview displayed there?
This is only a cosmetic thing because I have a standard preview for the user to see anyway (snap 1). But it would be the icing on the cake if that preview could someone be fed into this popup print window.
Is this something we can do by code or is it a "system / by design issue"?
It has been 10 months since I worked on my app due to a death in the family, just started looking at it again and still not sure how to solve the problem.
The project inquires/help started here:
MFC MDI Collecting control states for the "apply" button routine
Since this is a specific focused question, I didn't want to muck up my other thread, so what I'd like to do is change the documents tab styles after the view is loaded. I know that this can be done because the master repository from Microsoft with all the code examples has a project called VCSamples-master\VCSamples-master\VC2010Samples\MFC\Visual C++ 2008 Feature Pack\TabControl which I have looked at. It dawns on me that even though I can follow its code, the calls are from within the MDI window itself where my issue is I'm trying to do this via a property page dialog using OnApply which changes things.
I was able to do part of this properly with the help of the thread above to the OutputPane successfully because I was able to get the Pane handle and execute. I was told that for the MDI tabs after creation that I need to parse the tabs, count them, and then execute. So my issue here is after I capture the tabs......how to change their styles.
Here is the code as it stands:
BOOL CSettingsUserTabs::OnApply()
{
BOOL bResult = CMFCPropertyPage::OnApply();
if (bResult)
{
// Update Output Pane Tab Styles (Works 100%)
AfxGetApp()->WriteProfileInt(_T("Settings"), _T("UserTabStyle"), m_style_tabs); // Save value to registry
((CMainFrame*)AfxGetMainWnd())->m_wndOutput.m_wndTabs.ModifyTabStyle((CMFCTabCtrl::Style)m_style_tabs);
((CMainFrame*)AfxGetMainWnd())->m_wndOutput.m_wndTabs.RecalcLayout();
//Get the open file tabs in the MDI
for (POSITION pos = AfxGetApp()->GetFirstDocTemplatePosition(); pos != NULL; )
{
CDocTemplate* pTempl = AfxGetApp()->GetNextDocTemplate(pos);
for (POSITION pos1 = pTempl->GetFirstDocPosition(); pos1 != NULL; )
{
CDocument* pDoc = pTempl->GetNextDoc(pos1);
for (POSITION pos2 = pDoc->GetFirstViewPosition(); pos2 != NULL; )
{
CView* pView = pDoc->GetNextView(pos2);
if (pView->IsKindOf(RUNTIME_CLASS(CTrainView)))
{
// THIS IS WHERE MY ISSUE IS, NOW THAT ALL THE TABS ARE
// CAPTURED, HOW DO I ADDRESS THEM LIKE WHAT IS SHOWN
// ABOVE:
//((CMainFrame*)AfxGetMainWnd())->xxxxxx.yyyyyy.ModifyTabStyle((CMFCTabCtrl::Style)m_style_tabs);
}
}
}
}
}
return bResult;
}
If I can figure this last piece out, I'll be basically finished, I just can't seem to find a solution on how to do this via property sheet via OnApply.
Any suggestions or actual code examples I can see to solve my problem?
FYI: No, I haven't had any time to take additional OOP to solve this. I'm hoping someone can provide some guidance so I can move on after getting this sorted.
Thanks,
Chris
EDIT 1:
So I took a closer look at Constantine's suggestion and here is what I came up with:
BOOL CSettingsUserTabs::OnApply()
{
BOOL bResult = CMFCPropertyPage::OnApply();
if (bResult)
{
// Update Output Pane Tab Styles
AfxGetApp()->WriteProfileInt(_T("Settings"), _T("UserTabStyle"), m_style_tabs); // Save value to registry
((CMainFrame*)AfxGetMainWnd())->m_wndOutput.m_wndTabs.ModifyTabStyle((CMFCTabCtrl::Style)m_style_tabs);
((CMainFrame*)AfxGetMainWnd())->m_wndOutput.m_wndTabs.RecalcLayout();
CMFCTabCtrl& MDI_STYLES = ((CMainFrame*)AfxGetMainWnd())->GetMDITabs();
MDI_STYLES.ModifyTabStyle((CMFCTabCtrl::Style)m_style_tabs);
MDI_STYLES.RecalcLayout();
CMDIFrameWndEx* pMainFrame = DYNAMIC_DOWNCAST(CMDIFrameWndEx, GetTopLevelFrame());
pMainFrame->SetFocus();
pMainFrame->RecalcLayout();
}
return bResult;
}
The m_styles_tabs is getting the index value of 0-8 when I select the radio button. The code compiles and runs and I see the index value change when I break on it, but the tabs for the MDI are still not updating. Does the edited code make sense based on the members shown here:
https://learn.microsoft.com/en-us/cpp/mfc/reference/cmfctabctrl-class?view=msvc-170#modifytabstyle
I think this the right direction, am I missing something?
I'm a little new to using MFC and VC++ as such, but I'm doing this as part of a Course and i Have to stick to VC++.
http://www.cprogramming.com/tutorial/game_programming/same_game_part1.html
This is the tutorial I have been following to make a simple samegame. However when i try to display score, the score is getting displayed Underneath or outside my application window, even though I've displayed score before calling updateWindow(). I've tried various methods but I am kinda lost here.
Here is the code I'm using to Display the score:
void CSameGameView::updateScore()
{
CSameGameDoc* pDoc = GetDocument();
CRect rcClient, rcWindow;
GetClientRect(&rcClient);
GetParentFrame()->GetWindowRect(&rcWindow);
int nHeightDiff = rcWindow.Height() - rcClient.Height();
rcScore.top=rcWindow.top + pDoc->GetHeight() * pDoc->GetRows() + nHeightDiff;
rcScore.left=rcWindow.left + 50;
rcScore.right=rcWindow.left + pDoc->GetWidth() - 50;
rcScore.bottom=rcScore.top + 20;
CString str;
double points = Score::getScore();
str.Format(_T("Score: %0.2f"), points);
HDC hDC=CreateDC(TEXT("DISPLAY"),NULL,NULL,NULL);
COLORREF clr = pDoc->GetBoardSpace(-1, -1); //this return background colour
pDC->FillSolidRect(&rcScore, clr);
DrawText(hDC, (LPCTSTR) str, -1, (LPRECT) &rcScore, DT_CENTER);
}
Thank you for any help and I'm sorry if the question doesn't make sense or in ambiguous.
There are several problems with your code:
1. The hDC you are creating is going to have coordinates relative to the desktop window. To paint text in your window, use CClientDC like this: CClientDC dc(this); (see http://msdn.microsoft.com/en-US/library/s8kx4w44%28v=vs.80%29.aspx)
2. The code you have will leak a DC every time the function is called. The method in #1 will fix that.
3. Your paint code should be done in the CView::OnDraw. There you get a DC passed to you and you don't have to worry about creating one with CClientDC. Set the variables you want to draw (e.g. your points or score), store them as class members and draw them in CView::OnDraw.
Don't do the drawing in your updateScore method.
Make sense? Hang in there!
I have a dialog box displayed when I press a menu item in the SDI window. In the Dialog box When i press OK button it should display "SUCESS" in the SDI window... In ONVIEW() i have to use pDC->TEXTOUT() but how to execute that statement on pressing OK button.. I am using visual C++ 6
you should define a user defined message and use PostMessage to call your method in SDI Window.
I am working on assumption that your dialog is modal.
You do not have to define or send any messages.
Retrieve data from the dialog.
Presumably you store 2D vector data in some kind of an array declared as a member variable of the dialog.
When OK button is pushed and copy data to a view’s member variable of the same type. Use it to draw whatever you desire.
void CSDIPopupSampleView::OnViewDialog()
{
CSimpleDlg dlg;
int iResponse = dlg.DoModal();
if(IDOK == iResponse)
{
//Copy data from a dialog here.
}
Invalidate(); // this will cause redraw
}
How can I make the command button in my VC++ 6.0 dialog visible or invisible on load?
From the resource editor once you select the button, you can see its properties in the properties window. Here you can set the visible property to true / false. (assuming this functionality is present in 6.0 - i use 2003 now and cannot remember if this used to be present in 6.0)
Add CButton variable
If you want to dynamically change the buttons visibility during load, add a variable for your button using the MFC class wizard. (you are lucky to have this - this wizard seems to have been removed from Visual Studio .NET)
Override CDialog InitDialog
Next override the initdialog function of your dialog box and then once the base InitDialog function has been successfully called, set the buttons showwindow property to SW_HIDE / before showing the dialog box.
Code
BOOL CMyDialog::OnInitDialog()
{
CDialog::OnInitDialog();
if (ConditionShow)
m_MyButton.ShowWindow(SW_SHOW);
else
m_MyButton.ShowWindow(SW_HIDE);
return TRUE;
}
You can also do it without adding a CButton variable - just call
In the OnInitDialog method of the window containing the button/control, put in code:
CWnd *wnd = GetDlgItem (YOUR_RESOURCE_NAME_OF_THE_BUTTON)
wnd->ShowWindow(SW_SHOW) or SW_HIDE
What do you mean by 'commnad button' exactly ?
Anyway, you need to obtain the handle of the button then call ShowWindow function:
BOOL prevState = ShowWindow( itemHandle, SW_HIDE );
Only use
ShowDlgItem(Your_DLG_ITEM_ID,1); // visible = true
ShowDlgItem(Your_DLG_ITEM_ID,0); // visible = false