I'm not sure what I'm doing wrong here. I'm trying to implement a resizing dialog window using MFC. The code is pretty straightforward. I override the following sizing notification:
void CMyDlg::OnSize(UINT nType, int cx, int cy)
{
CDialog::OnSize(nType, cx, cy);
// TODO: Add your message handler code here
//...
//First move the groupbox, pGroupbox is of type CWnd
pGroupbox->MoveWindow(rcGroupbox);
//And then move all radio buttons in it
//Each is moved the exact same way
//pEachRadioButton is of type CWnd
pEachRadioButton->MoveWindow(rcEachRadioButton);
}
But what I get as a result is this.
First here's the initial groupbox:
It happens only when I start dragging the bottom of the main window frame down. I get this artifact:
Note that the radio button positions themselves are correct. If I move the mouse over either of them, it redraws itself correctly (like this "shut-down" button):
Here's the layout of the dialog itself:
IDD_MY_DIALOG DIALOGEX 0, 0, 437, 190
STYLE DS_SETFONT | DS_FIXEDSYS | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_POPUP | WS_VISIBLE | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME
EXSTYLE WS_EX_APPWINDOW
CAPTION "My dialog"
MENU IDR_MENU_MAIN
FONT 8, "MS Shell Dlg", 0, 0, 0x1
BEGIN
PUSHBUTTON "&Cancel",IDCANCEL,381,169,50,14
GROUPBOX "When Tasks Are Completed",IDC_STATIC_WHEN_COMPLETED,7,113,423,36
CONTROL "Close the pro&gram",IDC_RADIO_CLOSE_PROGRAM,"Button",BS_AUTORADIOBUTTON | WS_GROUP,26,129,73,8
CONTROL "Put computer to sleep",IDC_RADIO_SLEEP,"Button",BS_AUTORADIOBUTTON,122,129,84,10
CONTROL "Hibernate computer",IDC_RADIO_HIBERNATE,"Button",BS_AUTORADIOBUTTON,229,129,78,10
CONTROL "Shut down computer",IDC_RADIO_SHUT_DOWN,"Button",BS_AUTORADIOBUTTON,330,129,81,10
DEFPUSHBUTTON "&OK",IDC_BUTTON_SET,311,161,67,22
END
I did some search and found this article, but unfortunately setting those styles did not fix the bug.
Any idea how to fix this?
PS. I'm testing it on Windows Vista, 7, or 8 with visual themes enabled.
When you move a window, the window manager will move the current image of the window as it exists. Unfortunately because you moved the frame first, all those windows got clipped. Flipping them around wouldn't help, because then the tops would get clipped.
The easy way to fix it would be to call InvalidateRect on each control after moving it.
The better way would be to call BeginDeferWindowPos before you start moving anything, then EndDeferWindowPos when you're done so that all the windows move together.
P.S. Windows prefers for the group box to come after the radio buttons in the tab order, that might make a difference too.
Related
I am having trouble adding the minimise button to my MFC Dialog application. I have enabled minimise box (true).
The minimise button appears in the designer view but when I run the application the buttons are not visible.
Other settings are:
Style: Overlapped
Application Window: True
Border: Dialog Frame
Tool Window: False
System Menu: True
I tried adding:
ModifyStyle(0, WS_MINIMIZEBOX, TRUE);
to the OnInitDialog() but hasn't solved it.
There are 3 styles that I can choose which are popup, child and overlapped. If I use popup I don't see a title bar and cannot drag the window. Child throws an access violation if I use that style, so the only style I can choose is overlapped which shows the title bar and allows me to drag the window but the minimise button is not visible.
I am using Visual Studio 2019 and running Windows 10 1809.
I have double checked and minimise box is set to TRUE however it still won't show up on the dialog box when running.
The problem is when I use the Popup window style, I do not see the title bar at all! Also if I use the popup style I am unable to drag the window (title bar is missing). Overlapped seems the only style that I can use.
Try something like this:
BOOL CMFCApplication1Dlg::OnInitDialog()
{
ModifyStyle(0, WS_POPUP | WS_SYSMENU | WS_CAPTION | WS_MINIMIZEBOX, TRUE);
...
}
Consider modifying your dialog template (in the .RC file) to include the necessary style bits instead of modifying the style at runtime.
MFC is no different from programming a dialog without any frameworks. You declare a DIALOGEX resource, and have the system load it up, and display a dialog based on that template.
To get a dialog with a minimize box it needs at least the styles WS_MINIMIZEBOX and WS_SYSMENU1. Open up the .rc script that defines the DIALOGEX dialog template, and make sure those 2 styles are present in the STYLE element.
A default dialog template for a dialog-based application (with a minimize box) will typically be defined like this:
IDD_MFCAPPLICATION1_DIALOG DIALOGEX 0, 0, 320, 200
STYLE DS_SHELLFONT | WS_POPUP | WS_VISIBLE | WS_CAPTION
| WS_THICKFRAME
| WS_SYSMENU
| WS_MINIMIZEBOX
EXSTYLE WS_EX_APPWINDOW
CAPTION ""
FONT 8, "MS Shell Dlg"
BEGIN
DEFPUSHBUTTON "OK",IDOK,209,179,50,14
PUSHBUTTON "Cancel",IDCANCEL,263,179,50,14
CTEXT "TODO: Place dialog controls here.",IDC_STATIC,10,96,300,8
END
You don't need to write any code that executes at runtime to get this behavior.
1 From Window Styles: "WS_MINIMIZEBOX: The window has a minimize button. [...] The WS_SYSMENU style must also be specified."
BOOL CMFCApplication1Dlg::OnInitDialog(){
ModifyStyle(0, WS_MINIMIZEBOX, TRUE);
ModifyStyle(0, WS_POPUP, TRUE);
ModifyStyle(0, WS_BORDER, TRUE);
ModifyStyle(0, WS_SYSMENU, TRUE);
ModifyStyle(0, WS_CAPTION, TRUE);
I'm creating a window in C++ with that code:
HWnd = CreateWindow(wc.lpszClassName,
"myapp",
WS_POPUP |WS_VISIBLE,
10, 10, 1000, 800, 0, 0, hInst, NULL);
It appears as I want but when I maximize it with like this:
ShowWindow(hwnd, SW_SHOWMAXIMIZED);
then it's like a fullscreen window so that the taskbar is hidden.
I think it's because it is a POPUP window but this is like I want it to appear.
Do I need to create my own maximize function or is there a parameter to avoid that ?
Thanks
You can add WS_CAPTION | WS_SYSMENU | WS_MAXIMIZEBOX style.
If you want your window to be without caption then you will need to adjust window size manually to fit into desktop work area that you can query using SystemParametersInfo specifying SPI_GETWORKAREA flag.
This is a feature where the Taskbar will get out of your full-screen application:
If you want to create a fullscreen window that covers the taskbar, just create a fullscreen window and the taskbar will automatically get out of the way.
I’ve seen people hunt for the taskbar window and then do a ShowWindow(hwndTaskbar, SW_HIDE) on it. This is nuts for many reasons.
Don’t do any of this messing with the taskbar. Just create your fullscreen window and let the taskbar do its thing automatically.
Since this is Stackoverflow, a combination of Wikipedia and Reddit, i want this relevant information saved for the next guy asking this question.
I'm working on an Windows Application which has to show an overlaying fixed positioned window ("PopUp") in the left corner of the MainFrame which will receive some Information if a user missed some input or if certain actions have been successfully.
The "PopUp" Titlebar shall have an Icon next to the Title (e.g. ->Icon<- "Error") and the standard X - Close-Button. The ClientArea will have an descriptive text of the occurred Message.
Additionally the standard Border of the PopUp shall be set to 1px(smaller than the default windows border)
The "PopUp" is derived from CWnd and created with WS_VISLBE | WS_CLIPSIBLINGS | WS_CHILD | WS_CAPTION in the OnCreate-Method of the Applications MainFrame Window
Now I need to set/shrink the default Border of my PopUp and add the Icon to the Titlebar of the PopUp.
Can someone give me some example code of how i can solve my issues?
I'm pretty new to c++ and MFC so far my research brought me to https://msdn.microsoft.com/en-us/library/windows/desktop/bb688195(v=vs.85).aspx
but i dont know where and how to use DwmExtendFrameIntoClientArea() but so far I've read I assume Dwm is the way to go to be able to solve both problems or is there another/totally different way? Am I on the right track?
Finally I was able to shrinkthe default Windows Border by overriding the handling of WM_NCCALCSIZE.
I will update this answer as soon as I solved how to put my Icon in the Titlebar.
As of now I'll explain how I shrink the windows border:
Add ON_WM_NCCALCSIZE() to your MessageMap of the desired Window and Implement OnNcCalcSize() (Class Wizard will help to set this up) as followed:
void YourCWndClass::OnNcCalcSize(BOOL bCalcValidRects, NCCALCSIZE_PARAMS* lpncsp)
{
if (bCalcValidRects){
CRect rcClient, rcWind;
GetClientRect(&rcClient);
GetWindowRect(&rcWind);
int border = (rcWind.right - rcWind.left - rcClient.right) / 2 - 1;
//-1: leaves 1px of the Windows Default Border Width erase to have no border
lpncsp->rgrc->left -= border;
lpncsp->rgrc->right += border;
lpncsp->rgrc->bottom += border;
}
CWnd::OnNcCalcSize(bCalcValidRects, lpncsp);
}
The WM_NCCALCSIZE Message is sent up on the Window Creation (when you call Create()/CreateEx() ) but at this point of time GetClientRect() and GetWindowRect() will not return the proper values therefore you need to check the Bool Parameter!!!
To trigger another WM_NCCALCSIZE to be able to work with the proper Window Rectangles call SetWindowPos() right after the window creation
if (!m_MessagePopOver->Create(NULL, NULL, WS_CHILD | WS_CLIPSIBLINGS | WS_CAPTION, rect, this, NULL, NULL)){
TRACE0("failed to create MessagePopOver");
}
m_MessagePopOver->SetWindowPos(&wndTop, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
This will result in a window like this:
I'm currently using the SkeletonBasics-D2D library. I would like to give a presentation with the skeleton but need make the window fullscreen. Here are the notes I currently worked through and my next step is potentially modifying the .rc file to work with the full screen windowed app; however, I'd like to ask first is anyone knows another way.
Potentially it could just be manipulating this code in my SkeletonBasics.rc file :
IDD_APP DIALOGEX 0, 0, 512, 424
STYLE DS_SETFONT | DS_FIXEDSYS | WS_MINIMIZEBOX | WS_CLIPCHILDREN | WS_CAPTION | WS_SYSMENU
EXSTYLE WS_EX_CONTROLPARENT | WS_EX_APPWINDOW
CAPTION "Skeleton Basics"
CLASS "SkeletonBasicsAppDlgWndClass"
FONT 8, "MS Shell Dlg", 400, 0, 0x1
BEGIN
CONTROL "",IDC_VIDEOVIEW,"Static",SS_BLACKFRAME,0,0,512,384
LTEXT "Click 'Seated' to change skeletal pipeline type!",IDC_STATUS,0,413,511,11,SS_SUNKEN,WS_EX_CLIENTEDGE
CONTROL "Seated",IDC_CHECK_SEATED,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,238,391,55,8
END
Notes from code :
creating a window causes different signals to be generated than a dialog
where a dialog expects WM_INITDIALOG on create, a window should expect WM_NCCREATE
the dialog's DLGPROC was being set with CreateDialogParamW(). The window's WNDPROC is set within a WNDCLASS structure and then registered before CreateWindow()
the window's class name is important, as it's referred to in the SkeletonBasics.rc file wc.lpszClassName = L"SkeletonBasicsAppDlgWndClass";
need to determine all messages sent to the window and handle them appropriately
This tutorial is a great example of full screen and have used it to convert my application into full screen.
To get there, I needed to change the dialog proc to a window.
http://www.directxtutorial.com/Lesson.aspx?lessonid=11-4-4
I was wondering, how do I create a re-sizable border in MFC without showing the border itself?
IDD_GADGETTRANSLUCENTDIALOG DIALOGEX 0, 0, 320, 201
STYLE DS_SETFONT | DS_FIXEDSYS | WS_SYSMENU | WS_THICKFRAME
The "WS_THICKFRAME" style provides the functionality of resizing, but I don't want the border to be visible. How would I go about doing this?
Or handle WM_NCPAINT and draw the borders (and caption) yourself...
I created a MCF application that has the borders (and frame) as optional. When in the mode of no border, I still wanted it resizable and movable, so essentially in OnMouseMove if I was within a few pixels of the edge of the window, I set the appropriate cursor (e.g. IDC_SIZENESW for the top right corner) then if nFlags & MK_LBUTTON did a SendMessage using WM_SYSCOMMAND and the appropriate size command (e.g. SC_SIZE + WMSZ_TOPRIGHT) and let the CWnd::OnSysCommand default handler process it. Also, same trick works with SC_MOVE...