83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
// 6 april 2015
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#include "uipriv_windows.h"
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// this is a helper function that takes the logic of determining window classes and puts it all in one place
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// there are a number of places where we need to know what window class an arbitrary handle has
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// theoretically we could use the class atom to avoid a _wcsicmp()
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// however, raymond chen advises against this - http://blogs.msdn.com/b/oldnewthing/archive/2004/10/11/240744.aspx (and we're not in control of the Tab class, before you say anything)
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// usage: windowClassOf(hwnd, L"class 1", L"class 2", ..., NULL)
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int windowClassOf(HWND hwnd, ...)
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{
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// MSDN says 256 is the maximum length of a class name; add a few characters just to be safe (because it doesn't say whether this includes the terminating null character)
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#define maxClassName 260
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WCHAR classname[maxClassName + 1];
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va_list ap;
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WCHAR *curname;
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int i;
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if (GetClassNameW(hwnd, classname, maxClassName) == 0)
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logLastError("error getting name of window class in windowClassOf()");
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va_start(ap, hwnd);
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i = 0;
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for (;;) {
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curname = va_arg(ap, WCHAR *);
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if (curname == NULL)
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break;
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if (_wcsicmp(classname, curname) == 0) {
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va_end(ap);
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return i;
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}
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i++;
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}
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// no match
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va_end(ap);
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return -1;
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}
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void complain(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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fprintf(stderr, "[libui] ");
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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va_end(ap);
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DebugBreak();
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abort(); // just in case
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}
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// wrapper around MapWindowRect() that handles the complex error handling
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void mapWindowRect(HWND from, HWND to, RECT *r)
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{
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DWORD le;
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SetLastError(0);
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if (MapWindowRect(from, to, r) == 0) {
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le = GetLastError();
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SetLastError(le); // just to be safe
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if (le != 0)
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logLastError("error calling MapWindowRect() in mapWindowRect()");
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}
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}
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DWORD getStyle(HWND hwnd)
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{
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return (DWORD) GetWindowLongPtrW(hwnd, GWL_STYLE);
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}
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void setStyle(HWND hwnd, DWORD style)
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{
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SetWindowLongPtrW(hwnd, GWL_STYLE, (LONG_PTR) style);
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}
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DWORD getExStyle(HWND hwnd)
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{
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return (DWORD) GetWindowLongPtrW(hwnd, GWL_EXSTYLE);
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}
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void setExStyle(HWND hwnd, DWORD exstyle)
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{
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SetWindowLongPtrW(hwnd, GWL_EXSTYLE, (LONG_PTR) exstyle);
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}
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