CODEWITHSUNDEEP
c++winapi
user3149656
user3149656

Reputation: 27

Calculating client size and position from Window Rect

How do I get the client size and position with window rect? Is this possible?

Upvotes: 1

Views: 1958

Answers (3)

user3149656
user3149656

Reputation: 27

I found a solution:

RECT GetClientRectFromWindowRect(HWND hWnd, RECT rect)
{
    RECT v = { 0 };
    AdjustWindowRectEx(&v, 
        GetWindowLong(hWnd, GWL_STYLE), 
        !!GetMenu(hWnd), 
        GetWindowLong(hWnd, GWL_EXSTYLE)
        );
    RECT ret = { 0 };
    ret.bottom = rect.bottom - v.bottom;
    ret.left = rect.left - v.left;
    ret.right = rect.right - v.right;
    ret.top = rect.top - v.top;
    return ret;
}

Upvotes: 0

Killzone Kid
Killzone Kid

Reputation: 6240

Not sure what exactly you are trying to find out. Maybe try something like this:

#include <iostream>
#include <windows.h>

int main()
{
    RECT r;
    HWND h = GetConsoleWindow(); // or whatever window needed

    GetWindowRect(h, &r);
    std::cout << "Relative Client X,Y: " << r.left << "," << r.top << std::endl;
    std::cout << "Relative Client W,H: " << r.right - r.left << "," << r.bottom - r.top << std::endl;

    GetClientRect(h, &r);
    std::cout << "Client X,Y: " << r.left << "," << r.top << std::endl;
    std::cout << "Client W,H: " << r.right - r.left << "," << r.bottom - r.top << std::endl;
}

For example:

Relative Client X,Y: 100,100
Relative Client W,H: 947,594
Client X,Y: 0,0
Client W,H: 910,552

And/or if you want to get client area position relative to the screen, you can use ClientToScreen function. For example:

#include <windows.h>

int main()
{
    HWND h = GetConsoleWindow(); // or provided HWND
    POINT p{}; // defaulted to 0,0 which is always left and top of client area

    ClientToScreen(h, &p);
    SetCursorPos(p.x, p.y); // places cursor to the 0,0 of the client
}

Upvotes: 1

Binu MD
Binu MD

Reputation: 25

If you have a window RECT, the upper left corner is the window position and also you can calculate the size using upper left and lower-right corners of the window.

https://msdn.microsoft.com/en-us/library/windows/desktop/ms633519(v=vs.85).aspx

Upvotes: 0

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