I'm using an MFC application with a toolbar.
I need to use a button of this toolbar in some class.
But, i don't find how to map the toolbar button events to methods of my class.
I saw in the property menu that i can map an event to a method. but there the name the the button is not in the events list.
The button is already used in other classes.
So how to map a toolbar button in my class ?
The only classes that receive toolbar messages are view windows, the mainframe, the document and the CWinApp. Toolbar/Menu messages are not routed to other classes. Your question would be clearer if you explain what kind of class you are trying to add the toolbar message handler into.
Another problem is that the Visual Studio wizard assumes that there is a menu command with the same ID as each toolbar button. So it only lists menu IDs, not toolbar IDs that have no matching menu command. But you can easily map a toolbar button to a class method without the wizard's help by putting a line like this in the class message map:
ON_COMMAND(ID_NEW_TOOLBUTTON, OnNewToolbutton)
But it will only work in the above mentioned classes that receive toolbar messages.
Related
I am having a proglem with the MFC application and the DialogBox. I am quiet sure I've done everything well with this tutorial: https://msdn.microsoft.com/en-us/library/6wb9s9ah.aspx
but still it doesn't work...
1. I've created new project with simple menu commands.
2. I've created new menu item (+ID) and new resource DialogBox (+ID).
3. Then I've added a new class named CParameters with the Class Wizard. For the BaseClass I've typed in CDialog.
4. I've created new handler on the menu item and added the code
CParameters dlg;
dlg.DoModal();
I think this is it, and this should work... But it doesnt... What is missing??
Here is my project, you can access it freely:
https://www.dropbox.com/sh/e6ajoxqk76hkuvn/AACRMY8bgcuyXguFwP240QB9a?dl=0
Additionally I want to insert TextEditors and to change parameters in my program from the dialog box.
A scan of your source code reveals that you are trying to handle the menu item event within the class that is going to display the dialog.
void CParameters::OnParam()
{
// TODO: Add your command handler code here
CParameters dlg;
dlg.DoModal();
}
I don't see anywhere else that you actually instantiate the dialog class (I may have missed it). What you are trying is incorrect. You cannot handle the menu item event within the same class that displays the dialog because that class (CParameters) has not been instantiated, so, it cannot respond to the menu event. Typically, the menu event would be handled in the mainframe class.
If you are doing this by adding a new menu item from a simple SDI application, then trying adding that part of code in
CMainFrame::OnEdit
OnEdit method used here is obtained from the Event Handler for the new menu item and Message type being COMMAND.
I have a design like below:
So basically, I want to embed three dialogs in the application main dialog and switch between them, for each button click i.e., button 1 will show dialog one , button 2 will hide dialog 1 and show dialog 2 .. and so on.
Each dialog will be having a different design and functions.
I tried using CPropertySheet class to Add pages but its GUI is different. It has either option for navigating the dialogs using next / back button , or from a tab control.
None of which is as per my requirement.
So I want to know is it possible to have a design like this in MFC ? If yes how? Which Class/ control should I use.
Any help will be appreciated.
What you can do is use a normal CDialog class, add your buttons to it and also create a frame/rect as a placeholder for where your embedded dialogs are to appear. The following piece of code will create and position your embedded dialog.
CRect rect;
CWnd *pHost = GetDlgItem(ID_OF_YOUR_FRAME_RECT);
pHost->GetWindowRect(&rect);
ScreenToClient(&rect);
pDialog->Create(ID_OF_YOUR_DIALOG, this);
pDialog->MoveWindow(&rect);
pDialog->ShowWindow(SW_SHOW);
On button clicks, you hide the previously shown dialog (SW_HIDE) and show your selected dialog(SW_SHOW) with ShowWindow(...).
If you create your embedded dialogs with IDD_FORMVIEW style in the add resource editor it'll have the proper styles for embedding.
Another option is probably to use an embedded PropertySheet and hide the tab row and programatically change the tabs on the button clicks. I just find it to be too much fuzz with borders, positioning, validation and such for my liking.
If you have the MFC Feature Pack, that first came with VS2008 SP1 and is in all later versions, you might like to consider CMFCPropertySheet. There are a number of examples on the linked page, that are very similar to your design.
For example, this:
What worked for me just using dialog based application is SetParent() method. Dont know why nobody mentioned it. It seems to work fine.
I am doing like below:
VERIFY(pDlg1.Create(PanelDlg::IDD, this));
VERIFY(pDlg2.Create(PanelDlg2::IDD, this));
VERIFY(pDlg3.Create(PanelDlg2::IDD, this));
::SetParent(pDlg1.GetSafeHwnd(), this->m_hWnd);
::SetParent(pDlg2.GetSafeHwnd(), this->m_hWnd);
::SetParent(pDlg3.GetSafeHwnd(), this->m_hWnd);
Now I can show or hide a child dialog at will (button clicks) as below:
pDlg1.ShowWindow(SW_SHOW);
pDlg2.ShowWindow(SW_HIDE);
pDlg3.ShowWindow(SW_HIDE);
I have a document within MFC C++ application. I need to delete one the buttons from the particular CMFCToolbar within a code (not resources) completely, even preventing a user to restore the button via toolbar customization dialog. At this moment I use RemoveButton method of CMFCToolbar but it only makes the button invisible and it can be restored via toolbar customization dialog that is not an option for me at this time. I will be very glad if you suggest something that can help me there.
There are two internal lists in CMFCToolBar that are used to reset the Buttons upon customization.
They are named m_OrigButtons and m_OrigResetButtons.
You may need to derive your own class and delete the buttons with the specific IDs from there.
But better: Never to include such a button on the first time when the toolbar is created!
I've created a simple Dialog box with a few controls (edit, text, etc) and saved
it to the resource folder in GME/GME.rc/Dialog
I added an auto-gen'd event handler which created a new class (Class.cpp
for the purposes of this example) Note: the Class::Class(CWnd *pParent) :
CDialogEx(Class::IDD, pParent) constructor is empty, I'm not sure if that's
relevant but I don't think it is..
There's a MESSAGE_MAP COMMAND(menu_item_id, &class::member_function())
invocation within the Class.cpp was auto-generated. It's wrapped in the
standard BEGIN_MESSAGE_MAP macro stuff.
However: when the menu item is clicked, the item remains gray. The
properties for "enabled=true" and "gray=false" are both properly
configured. So, I assume this is error is due to the message handler isnt
registered.
Any help would be appreciated.
Without code, it's pretty darn hard to help. Are you sure you put the message handler for the menu id in either a CView, CFrame, CDocument, or CWinApp derived class? If you put the menu handler in your dialog class, it's not going to do you much good.
Dialogs do not contain the code to run through the list of ON_UPDATE_COMMAND_UI handlers that MFC uses to enable menu items. Ordinarily this is handled by CFrameWnd for example. Try calling UpdateDialogControls in your OnInitDialog function.
I see that your code is also missing the ON_UPDATE_COMMAND_UI macro for the menu item, even though the handler it would reference was created for you.
You add menu item handlers to the window that has the menu, which is usually the CMainFrame. Copy the message map and handler to the CMainFrame and see if that helps. I'm not sure what you're trying to do here - I assume you want to display 'Class' (maybe better to edit your post to call this 'ExampleDialog' or something...) when the menu item is clicked, right? Or did you somehow add a menu to your CDialogEx-derived class? If the last, I guess this is what Mark is referring to - 'how are you displaying the menu'? How are you manually adding a menu to your dialog?
I am trying to upgrade my MFC MDI application to use the new MFC Feature Pack.
I converted the CToolbar to CMFCToolBar. Now I am trying to disable one item in the toolbar under certain conditions. I listened to the ON_UPDATE_COMMAND_UI message of the item's ID and disabled the item by writing the following:
pCmdUI->Enable(FALSE);
This works perfectly only if the ON_UPDATE_COMMAND_UI message was handled in the CView object but not if handled in the CMFCToolbar derived class.
If there a way to disable an item from the toolbar class itself?
The Toolbar is not part of the command routing in MFC. So it will never get the command and update command UI messages. You can see the command routing in detail here: MFC Command Routing
You could overwrite the OnCmdMsg() method in one of the objects which gets the command messages (as you can see in the link above) and pass the message on to the Toolbar.