Dialogs

I am using a dialog and want to use an keyboard accelerator with the dialog. I was wondering if this was possible. I know how to do it with a regular window in the message loop (by using TranslateAccelerator), but I do not know how to do it with a dialog.

- Sean

Assuming a modeless dialog - exactly the same as a normal window. However you are confronted with a few choices. If you want default dialog processing for things like TAB and ESC keys then you still need to use IsDialogMessage or, alternatively, you can re-invent the wheel in your accelerator table.

The second choice you have is which you give precedence to ie TranslateAccelerator or IsDialogMessage. I prefer to give the custom accelerator the first go eg:

Code:

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while (GetMessage(&Msg,NULL,0,0)>0)
    {
    //is msg from a resource defined keyboard accelerator key?
    if (!TranslateAccelerator(hwnd,hAccelTable,&Msg))
        {
        //check for default dlg keyboard keys eg TAB, ESC
        if ((!IsWindow(hwnd))||(!IsDialogMessage(hwnd,&Msg)))
            {
            //translate and dispatch other messages
            TranslateMessage(&Msg);
            DispatchMessage(&Msg);
            }
        }
    }

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Where hwnd is the handle of your modeless dialog, hAccelTable is the handle to your accelerator table and Msg is the MSG struct.

Hope that helps.

edit: bored so made code pretty. :)

When I create my dialog I am using the function DialogBox. How can I use the message loop you gave with the DialogBox function?

- Sean

Quote:

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Originally posted by sean345
When I create my dialog I am using the function DialogBox. How can I use the message loop you gave with the DialogBox function?

- Sean

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Good question!......never really thought about that! You got me to pull out the compiler and start messing....

I tried to install a hook to read the MSG before the GetMessage() of your dialog laid its hands on it :).....

After some messing I came up with this......seems to woke AOK

Code:

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#include <windows.h>
#include "resource.h"

HHOOK g_hHook;//evils of globals I know...
HACCEL g_hAcc;
HWND g_hWnd;


BOOL CALLBACK DialogProc(HWND hwndDlg,UINT uMsg,WPARAM wParam,
                                                LPARAM lParam){
        switch(uMsg){
        case WM_INITDIALOG:
                g_hWnd = hwndDlg;//Set Global hwnd
                return 1;
        case WM_CLOSE:
                EndDialog(hwndDlg,0);
                return 1;
        case WM_COMMAND:
                if(LOWORD(wParam)==ID_F1){//catch F1 Key
                        MessageBox(hwndDlg,"F1 Pressed",NULL,MB_OK);
                        return 1;
                }
                else break;
        }

        return 0;
}
 
LRESULT CALLBACK GetMsgProc(int code,WPARAM wParam,
                                                        LPARAM lParam){

        TranslateAccelerator(g_hWnd,g_hAcc,(MSG*)lParam); //Here's the func!

        return CallNextHookEx(g_hHook,code,wParam,lParam);
}
 

int WINAPI WinMain(HINSTANCE hInst,HINSTANCE,LPSTR,int){       
       
        g_hAcc = LoadAccelerators(hInst,
                MAKEINTRESOURCE(IDR_ACCELERATOR1));
        if(!g_hAcc)return 1;

        g_hHook = SetWindowsHookEx(WH_GETMESSAGE,GetMsgProc,
                hInst,GetCurrentThreadId());
        if(!g_hHook)return 1;
 
        DialogBox(hInst,MAKEINTRESOURCE(IDD_DIALOG1),
                HWND_DESKTOP,DialogProc);

        UnhookWindowsHookEx(g_hHook);

        return 0;
}

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All that does is add a call to the hook procdecure before getting on with the normal business....

There's probably an easier more straight forward way though.....but the above works ok......

Ok. That works. Thanks for your help.

- Sean