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Made controls transparent to tab backgrounds on Windows. It doesn't quite work right...

This commit is contained in:
Pietro Gagliardi 2015-04-12 12:38:25 -04:00
parent 0ee55d2d2d
commit d0a1ae5bc9
4 changed files with 90 additions and 6 deletions
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51
new/container_windows.c
View File

@ -1,6 +1,11 @@
// 7 april 2015
#include "uipriv_windows.h"
// TODOs
// - [12:24] <ZeroOne> There's flickering between tabs
// - with CTLCOLOR handler: [12:24] <ZeroOne> And setting the button text blanked out the entire GUI until I ran my mouse over the elements / [12:25] <ZeroOne> https://dl.dropboxusercontent.com/u/15144168/GUI%20stuff.png
// - without CTLCOLOR handler: [12:33] <ZeroOne> If I hide the stack, then show it, it looks like it's drawing duplicate buttons underneath
/*
all container windows (including the message-only window, hence this is not in container_windows.c) have to call the sharedWndProc() to ensure messages go in the right place and control colors are handled properly
*/
@ -30,6 +35,42 @@ static LRESULT forwardNotify(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
return DefWindowProcW(hwnd, uMsg, wParam, lParam);
}
static void paintControlBackground(HWND hwnd, HDC dc)
{
HWND parent;
RECT r;
POINT pOrig;
DWORD le;
parent = hwnd;
for (;;) {
parent = GetParent(parent);
if (parent == NULL)
logLastError("error getting parent control of control in paintControlBackground()");
// wine sends these messages early, yay...
if (parent == initialParent)
return;
// skip groupboxes; they're (supposed to be) transparent
if (windowClassOf(parent, L"button", NULL) != 0)
break;
}
if (GetWindowRect(hwnd, &r) == 0)
logLastError("error getting control's window rect in paintControlBackground()");
// the above is a window rect in screen coordinates; convert to client rect
SetLastError(0);
if (MapWindowRect(NULL, parent, &r) == 0) {
le = GetLastError();
SetLastError(le); // just to be safe
if (le != 0)
logLastError("error getting client origin of control in paintControlBackground()");
}
if (SetWindowOrgEx(dc, r.left, r.top, &pOrig) == 0)
logLastError("error moving window origin in paintControlBackground()");
SendMessageW(parent, WM_PRINTCLIENT, (WPARAM) dc, PRF_CLIENT);
if (SetWindowOrgEx(dc, pOrig.x, pOrig.y, NULL) == 0)
logLastError("error resetting window origin in paintControlBackground()");
}
BOOL sharedWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT *lResult)
{
switch (uMsg) {
@ -39,19 +80,19 @@ BOOL sharedWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT *
case WM_NOTIFY:
*lResult = forwardNotify(hwnd, uMsg, wParam, lParam);
return TRUE;
/*TODO case WM_CTLCOLORSTATIC:
case WM_CTLCOLORSTATIC:
case WM_CTLCOLORBTN:
// read-only TextFields and Textboxes are exempt
/*TODO // read-only TextFields and Textboxes are exempt
// this is because read-only edit controls count under WM_CTLCOLORSTATIC
if (windowClassOf((HWND) lParam, L"edit", NULL) == 0)
if (textfieldReadOnly((HWND) lParam))
return FALSE;
if (SetBkMode((HDC) wParam, TRANSPARENT) == 0)
xpanic("error setting transparent background mode to Labels", GetLastError());
*/ if (SetBkMode((HDC) wParam, TRANSPARENT) == 0)
logLastError("error setting transparent background mode to controls in sharedWndProc()");
paintControlBackground((HWND) lParam, (HDC) wParam);
*lResult = (LRESULT) hollowBrush;
return TRUE;
*/ }
}
return FALSE;
}

6
new/init_windows.c
View File

@ -6,6 +6,8 @@ int nCmdShow;
HFONT hMessageFont;
HBRUSH hollowBrush;
struct uiInitError {
char *msg;
char failbuf[256];
@ -97,6 +99,10 @@ const char *uiInit(uiInitOptions *o)
if (ce != NULL)
return loadLastError(ce);
hollowBrush = (HBRUSH) GetStockObject(HOLLOW_BRUSH);
if (hollowBrush == NULL)
return loadLastError("getting hollow brush");
return NULL;
}

6
new/uipriv_windows.h
View File

@ -45,7 +45,10 @@ extern HRESULT logMemoryExhausted(const char *);
extern HINSTANCE hInstance;
extern int nCmdShow;
extern HFONT hMessageFont;
extern HWND initialParent;
extern HBRUSH hollowBrush;
// util_windows.c
extern int windowClassOf(HWND, ...);
// text_windows.c
extern WCHAR *toUTF16(const char *);
@ -66,4 +69,5 @@ extern const char *initCommonControls(void);
extern ATOM registerWindowClass(HICON, HCURSOR);
// initparent_windows.c
extern HWND initialParent;
extern const char *initInitialParent(HICON, HCURSOR);

33
new/util_windows.c
View File

@ -38,3 +38,36 @@ intmax_t uiWindowsWindowTextWidth(HWND hwnd)
return size.cx;
}
// this is a helper function that takes the logic of determining window classes and puts it all in one place
// there are a number of places where we need to know what window class an arbitrary handle has
// theoretically we could use the class atom to avoid a _wcsicmp()
// 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)
// usage: windowClassOf(hwnd, L"class 1", L"class 2", ..., NULL)
int windowClassOf(HWND hwnd, ...)
{
// 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)
#define maxClassName 260
WCHAR classname[maxClassName + 1];
va_list ap;
WCHAR *curname;
int i;
if (GetClassNameW(hwnd, classname, maxClassName) == 0)
logLastError("error getting name of window class in windowClassOf()");
va_start(ap, hwnd);
i = 0;
for (;;) {
curname = va_arg(ap, WCHAR *);
if (curname == NULL)
break;
if (_wcsicmp(classname, curname) == 0) {
va_end(ap);
return i;
}
i++;
}
// no match
va_end(ap);
return -1;
}