For my C++ program I'm trying to query my window's size through WINAPI's GetClientRect() function. However, it's returning a window that is slightly smaller than I originally setup. Here is the window setup stuff:
globalWindowWidth/Height are both set to 1280 and 720 respectively. Later on, in the WM_PAINT event, I get the window dimensions through this function which ultimately calls GetClientRect():
When called, GetClientRect returns a 'right' value of 1264 and 'bottom' value of 681, despite me wanting values of 1280 and 720. Why is this occurring?
EDIT:
After some research I found that this might have something to do with the CreateWindowEx call and the fact that is calculates total window size (includes window borders, title bar, etc.). So when I grab a client rect, it subtracts the window title bar and borders from the final pixel values. I find a function 'AdjustWindowRectEx' for which I'm trying to use:
However, my rect doesn't seem to be adding in additional border and title bar pixel values so I'm still stuck.
1 2 3 4 5 6 7 8 9 10 11 12 13 | //Creation of window WNDCLASS WindowProperties {}; WindowProperties.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW; //TODO: Check if OWNDC/HREDRAW/VEDRAW matter WindowProperties.lpfnWndProc = Win32::ProgramWindowCallback; WindowProperties.hInstance = CurrentProgramInstance; WindowProperties.lpszClassName = "MemoWindowClass"; if (RegisterClass(&WindowProperties)) { HWND window= CreateWindowEx(0, WindowProperties.lpszClassName, "My Program", WS_OVERLAPPEDWINDOW | WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, globalWindowWidth, globalWindowHeight, 0, 0, CurrentProgramInstance, 0); //more code |
globalWindowWidth/Height are both set to 1280 and 720 respectively. Later on, in the WM_PAINT event, I get the window dimensions through this function which ultimately calls GetClientRect():
1 2 3 4 5 6 7 8 9 10 11 | Window_Dimension GetWindowDimension(HWND window)
{
Window_Dimension Result;
RECT ClientRect;
GetClientRect(window, &ClientRect);
Result.width = ClientRect.right - ClientRect.left;
Result.height = ClientRect.bottom - ClientRect.top;
return(Result);
};
|
When called, GetClientRect returns a 'right' value of 1264 and 'bottom' value of 681, despite me wanting values of 1280 and 720. Why is this occurring?
EDIT:
After some research I found that this might have something to do with the CreateWindowEx call and the fact that is calculates total window size (includes window borders, title bar, etc.). So when I grab a client rect, it subtracts the window title bar and borders from the final pixel values. I find a function 'AdjustWindowRectEx' for which I'm trying to use:
1 2 3 | DWORD windowStyles = WS_VISIBLE;
RECT rect = { 0, 0, (LONG)globalWindowWidth, (LONG)globalWindowHeight };
BOOL success = AdjustWindowRectEx(&rect, windowStyles, false, 0);
|
However, my rect doesn't seem to be adding in additional border and title bar pixel values so I'm still stuck.
Edited by Jason
on
I think you just need to specify the rest of the styles you are using to create the window for AdjustWindowRectEx.
WS_OVERLAPPEDWINDOW includes
, but the documentation says not to specify WS_OVERLAPPED.
Alternatively, I think you could use GetWindowRect.
WS_OVERLAPPEDWINDOW includes
1 | WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX |
Alternatively, I think you could use GetWindowRect.
Edited by William
on
