Pop Up loading message
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Hi. I am trying to create a pop up loading message. Something like the MessageBox function would do, but no buttons will be visible or enabled until done loading. The app is dialog based. Loading/Done loading will be controled in the main window, and the pop up will be a modal simply to prevent any action from the user in the main window until done loading. Is this possible? Thanks in advance.
one way is to use a modeless dialog. ::EnableWindow(hwndMain, FALSE); ...create/show modeless status dialog... ...do loading ...destroy modeless status dialog... ::EnableWindow(hwndMain, TRUE);
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one way is to use a modeless dialog. ::EnableWindow(hwndMain, FALSE); ...create/show modeless status dialog... ...do loading ...destroy modeless status dialog... ::EnableWindow(hwndMain, TRUE);
I created a new dialog in the resource editor, called IDD_LOADING, and created a new class for it called CLoading. To create it, I have this code in the main dialog. EnableWindow(FALSE); CLoading *pLoadingDlg = new CLoading; pLoadingDlg->Create(IDD_LOADING,this); How do I destroy it? Something like this? CLoading::DestroyWindow(); EnableWindow(TRUE);
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I created a new dialog in the resource editor, called IDD_LOADING, and created a new class for it called CLoading. To create it, I have this code in the main dialog. EnableWindow(FALSE); CLoading *pLoadingDlg = new CLoading; pLoadingDlg->Create(IDD_LOADING,this); How do I destroy it? Something like this? CLoading::DestroyWindow(); EnableWindow(TRUE);
This is what I'd do: pLoadingDlg->DestroyWindow(); delete pLoadingDlg; pLoadingDlg = 0; EnableWindow(TRUE);
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I created a new dialog in the resource editor, called IDD_LOADING, and created a new class for it called CLoading. To create it, I have this code in the main dialog. EnableWindow(FALSE); CLoading *pLoadingDlg = new CLoading; pLoadingDlg->Create(IDD_LOADING,this); How do I destroy it? Something like this? CLoading::DestroyWindow(); EnableWindow(TRUE);
Just remembered... Just in case you didn't know, you should probably override OnCancel() in your modeless dialog class and do nothing in your implementation (don't call the base class OnCancel()) so the user can't mess things up with the ESC key :)
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This is what I'd do: pLoadingDlg->DestroyWindow(); delete pLoadingDlg; pLoadingDlg = 0; EnableWindow(TRUE);
So after implementing the create and destroy loading window, it didn't show up. So I added the line pLoadingDlg->ShowWindow(SW_SHOW); Now the window shows up, but when done loading, and the window is destroyed, the focus doesn't return to the main window. How can I fix that? I tried usins popup and overlap style, and it has the same problem. Using the child style, the loading window doesn't even show up. -- modified at 18:56 Monday 27th November, 2006
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So after implementing the create and destroy loading window, it didn't show up. So I added the line pLoadingDlg->ShowWindow(SW_SHOW); Now the window shows up, but when done loading, and the window is destroyed, the focus doesn't return to the main window. How can I fix that? I tried usins popup and overlap style, and it has the same problem. Using the child style, the loading window doesn't even show up. -- modified at 18:56 Monday 27th November, 2006
acerunner316 wrote:
after implementing the create and destroy loading window, it didn't show up
For the dalog resource: Style should be Child. Set the Visible property to TRUE.
acerunner316 wrote:
when done loading, and the window is destroyed, the focus doesn't return to the main window
Try this: HWND hwndOldForeground = ::GetForegroundWindow(); EnableWindow(FALSE); CLoading *pLoadingDlg = new CLoading; pLoadingDlg->Create(IDD_LOADING,this); ... ... pLoadingDlg->DestroyWindow(); delete pLoadingDlg; pLoadingDlg = 0; EnableWindow(TRUE); if (hwndOldForeground) { ::SetForegroundWindow(hwndOldForeground); hwndOldForeground = 0; }
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acerunner316 wrote:
after implementing the create and destroy loading window, it didn't show up
For the dalog resource: Style should be Child. Set the Visible property to TRUE.
acerunner316 wrote:
when done loading, and the window is destroyed, the focus doesn't return to the main window
Try this: HWND hwndOldForeground = ::GetForegroundWindow(); EnableWindow(FALSE); CLoading *pLoadingDlg = new CLoading; pLoadingDlg->Create(IDD_LOADING,this); ... ... pLoadingDlg->DestroyWindow(); delete pLoadingDlg; pLoadingDlg = 0; EnableWindow(TRUE); if (hwndOldForeground) { ::SetForegroundWindow(hwndOldForeground); hwndOldForeground = 0; }
Setting the style to child does not work. The popup window does not show up at all. The Visible property is already checked. The code to SetForeground code does not work. I also tried SetFocus(), but that didn't work either. Any other clever ideas?
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Setting the style to child does not work. The popup window does not show up at all. The Visible property is already checked. The code to SetForeground code does not work. I also tried SetFocus(), but that didn't work either. Any other clever ideas?
hmmm I tested the code before I posted it. Are you using the correct parent window when creating the dialog window?
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Setting the style to child does not work. The popup window does not show up at all. The Visible property is already checked. The code to SetForeground code does not work. I also tried SetFocus(), but that didn't work either. Any other clever ideas?
Setting the style to "Child" does not work because, when you disable a window, Windows will automatically disable its child windows as well. When you used SetFocus, did you do it as follows: HWND hwndSaveFocus = GetFocus() ; ... (display dialog and delete when done) ... SetFocus(hwndsaveFocus) ; Scott
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Setting the style to "Child" does not work because, when you disable a window, Windows will automatically disable its child windows as well. When you used SetFocus, did you do it as follows: HWND hwndSaveFocus = GetFocus() ; ... (display dialog and delete when done) ... SetFocus(hwndsaveFocus) ; Scott
hwndSaveFocus = GetFocus(); that gives me the error: error C2440: '=' : cannot convert from 'class CWnd *' to 'struct HWND__ *
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hmmm I tested the code before I posted it. Are you using the correct parent window when creating the dialog window?
How do i know if i'm using the correct parent window? When created the "loading..." dialog window, i just inserted a new dialog in the resource editor. And then opened class wizard to generate a new class for the new dialog. And the rest of the code, you pretty much know already.
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How do i know if i'm using the correct parent window? When created the "loading..." dialog window, i just inserted a new dialog in the resource editor. And then opened class wizard to generate a new class for the new dialog. And the rest of the code, you pretty much know already.
You are passing "this" as the parent. I don't know what class you are creating the dialog in. For example, if it is a CFrameWnd derived then you may need to pass the client window as the parent.
pLoadingDlg->Create(IDD_LOADING,this);By the way, as Scott mentioned, child windows do get disabled when you disable the parent. This doesn't affect the visiblility of any windows. I disabled the main window in my example to prevent the user from doing anything until the operation completes, which is the Microsoft recommended method. Of course, you can do what you want with the UI as you need to. This does work :) Here's the dialog resource I tested with:IDD_STATUS DIALOGEX 0, 0, 186, 25 STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | WS_CHILD | WS_VISIBLE EXSTYLE WS_EX_STATICEDGE FONT 8, "MS Shell Dlg", 400, 0, 0x1 BEGIN CTEXT "Test Status",IDC_STATIC,15,7,156,12 END -
You are passing "this" as the parent. I don't know what class you are creating the dialog in. For example, if it is a CFrameWnd derived then you may need to pass the client window as the parent.
pLoadingDlg->Create(IDD_LOADING,this);By the way, as Scott mentioned, child windows do get disabled when you disable the parent. This doesn't affect the visiblility of any windows. I disabled the main window in my example to prevent the user from doing anything until the operation completes, which is the Microsoft recommended method. Of course, you can do what you want with the UI as you need to. This does work :) Here's the dialog resource I tested with:IDD_STATUS DIALOGEX 0, 0, 186, 25 STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | WS_CHILD | WS_VISIBLE EXSTYLE WS_EX_STATICEDGE FONT 8, "MS Shell Dlg", 400, 0, 0x1 BEGIN CTEXT "Test Status",IDC_STATIC,15,7,156,12 ENDthis is what i have: pLoadingDlg->Create(IDD_LOADING,this); IDD_LOADING is configured as Style: child, Border: dialog frame, title bar, visible, tool window. Is this correct? The Loading dialog still doesn't show up. But the main window is disabled as expected. I can't click anything during the loading time.
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this is what i have: pLoadingDlg->Create(IDD_LOADING,this); IDD_LOADING is configured as Style: child, Border: dialog frame, title bar, visible, tool window. Is this correct? The Loading dialog still doesn't show up. But the main window is disabled as expected. I can't click anything during the loading time.
acerunner316 wrote:
IDD_LOADING is configured as Style: child, Border: dialog frame, title bar, visible, tool window.
OK for reference, I tested with the same except no title bar and no toolwindow. What I'm wondering is in this line pLoadingDlg->Create(IDD_LOADING,this); What class "this" points to? Where are you calling this from and what class is the window derived from?
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acerunner316 wrote:
IDD_LOADING is configured as Style: child, Border: dialog frame, title bar, visible, tool window.
OK for reference, I tested with the same except no title bar and no toolwindow. What I'm wondering is in this line pLoadingDlg->Create(IDD_LOADING,this); What class "this" points to? Where are you calling this from and what class is the window derived from?
this is called in a function belonging to the main dialog's class.
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this is called in a function belonging to the main dialog's class.
acerunner316 wrote:
this is called in a function belonging to the main dialog's class.
and called from what function?
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acerunner316 wrote:
this is called in a function belonging to the main dialog's class.
and called from what function?
Called from yet another function belonging to the same class. I only have one class because everything have been in one dialog box until now.
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Called from yet another function belonging to the same class. I only have one class because everything have been in one dialog box until now.
acerunner316 wrote:
Called from yet another function belonging to the same class.
OK, my point is, as long as you're not creating it in the class' WM_CREATE handler or OnInitDialog() override it should show. Are you creating the dialog, doing the processing, and destroying the dialog all in one function? If so, then you could try this: ... pLoadingDlg->Create(IDD_LOADING,this); Invalidate(FALSE); UpdateWindow(); ....do processing ...destroy dialog as usual
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acerunner316 wrote:
Called from yet another function belonging to the same class.
OK, my point is, as long as you're not creating it in the class' WM_CREATE handler or OnInitDialog() override it should show. Are you creating the dialog, doing the processing, and destroying the dialog all in one function? If so, then you could try this: ... pLoadingDlg->Create(IDD_LOADING,this); Invalidate(FALSE); UpdateWindow(); ....do processing ...destroy dialog as usual
Yes i am creating, processing and destroying all in one function. But on different calls of the function. Therefore, the pointer to CLoading has to be static. I've tried your new node, it works! But the dialog box is created in the upper left corner of the main dialog box. How can I position it so that it pops up in the center like with the popup and overlap styles?
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hwndSaveFocus = GetFocus(); that gives me the error: error C2440: '=' : cannot convert from 'class CWnd *' to 'struct HWND__ *
OK, hang on, let me check the API documentaiton....be right back