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// 17 july 2014
#include "winapi_windows.h"
#include "_cgo_export.h"
LRESULT getWindowTextLen(HWND hwnd)
{
return SendMessageW(hwnd, WM_GETTEXTLENGTH, 0, 0);
}
void getWindowText(HWND hwnd, WPARAM n, LPWSTR buf)
{
SetLastError(0);
if (SendMessageW(hwnd, WM_GETTEXT, n + 1, (LPARAM) buf) != (LRESULT) n)
xpanic("WM_GETTEXT did not copy the correct number of characters out", GetLastError());
}
void setWindowText(HWND hwnd, LPWSTR text)
{
switch (SendMessageW(hwnd, WM_SETTEXT, 0, (LPARAM) text)) {
case FALSE:
xpanic("WM_SETTEXT failed", GetLastError());
}
}
void updateWindow(HWND hwnd)
{
if (UpdateWindow(hwnd) == 0)
xpanic("error calling UpdateWindow()", GetLastError());
}
void *getWindowData(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT *lResult)
{
CREATESTRUCTW *cs = (CREATESTRUCTW *) lParam;
void *data;
data = (void *) GetWindowLongPtrW(hwnd, GWLP_USERDATA);
if (data == NULL) {
// the lpParam is available during WM_NCCREATE and WM_CREATE
if (uMsg == WM_NCCREATE)
SetWindowLongPtrW(hwnd, GWLP_USERDATA, (LONG_PTR) (cs->lpCreateParams));
// act as if we're not ready yet, even during WM_NCCREATE (nothing important to the switch statement below happens here anyway)
*lResult = DefWindowProcW(hwnd, uMsg, wParam, lParam);
}
return data;
}
/*
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
*/
/*
all controls that have events receive the events themselves through subclasses
to do this, all container windows (including the message-only window; see http://support.microsoft.com/default.aspx?scid=KB;EN-US;Q104069) forward WM_COMMAND to each control with this function, WM_NOTIFY with forwardNotify, etc.
*/
static LRESULT forwardCommand(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
HWND control = (HWND) lParam;
// don't generate an event if the control (if there is one) is unparented (a child of the message-only window)
if (control != NULL && IsChild(msgwin, control) == 0)
return SendMessageW(control, msgCOMMAND, wParam, lParam);
return DefWindowProcW(hwnd, uMsg, wParam, lParam);
}
static LRESULT forwardNotify(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
NMHDR *nmhdr = (NMHDR *) lParam;
HWND control = nmhdr->hwndFrom;
// don't generate an event if the control (if there is one) is unparented (a child of the message-only window)
if (control != NULL && IsChild(msgwin, control) == 0)
return SendMessageW(control, msgNOTIFY, wParam, lParam);
return DefWindowProcW(hwnd, uMsg, wParam, lParam);
}
BOOL sharedWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT *lResult)
{
switch (uMsg) {
case WM_COMMAND:
*lResult = forwardCommand(hwnd, uMsg, wParam, lParam);
return TRUE;
case WM_NOTIFY:
*lResult = forwardNotify(hwnd, uMsg, wParam, lParam);
return TRUE;
case WM_CTLCOLORSTATIC:
case WM_CTLCOLORBTN:
if (SetBkMode((HDC) wParam, TRANSPARENT) == 0)
xpanic("error setting transparent background mode to Labels", GetLastError());
paintControlBackground((HWND) lParam, (HDC) wParam);
*lResult = (LRESULT) hollowBrush;
return TRUE;
}
return FALSE;
}
void paintControlBackground(HWND hwnd, HDC dc)
{
HWND parent;
RECT r;
POINT p;
int saved;
WCHAR classname[128] = L""; // more than enough to avoid collisions
parent = hwnd;
for (;;) {
parent = GetParent(parent);
if (parent == NULL)
xpanic("error getting parent container of control in paintControlBackground()", GetLastError());
// wine sends these messages early, yay...
if (parent == msgwin)
return;
parent = GetParent(parent);
if (parent == NULL)
xpanic("error getting parent control of control in paintControlBackground()", GetLastError());
if (parent == msgwin)
return;
if (GetClassNameW(parent, classname, 128) == 0)
xpanic("error getting name of focused window class in paintControlBackground()", GetLastError());
// skip container and groupboxes
if (_wcsicmp(classname, containerclass) != 0) // container
if (_wcsicmp(classname, L"button") != 0) // groupbox
break;
}
if (GetWindowRect(hwnd, &r) == 0)
xpanic("error getting control's window rect in paintControlBackground()", GetLastError());
// the above is a window rect; convert to client rect
p.x = r.left;
p.y = r.top;
if (ScreenToClient(parent, &p) == 0)
xpanic("error getting client origin of control in paintControlBackground()", GetLastError());
saved = SaveDC(dc);
if (saved == 0)
xpanic("error saving DC info in paintControlBackground()", GetLastError());
if (SetWindowOrgEx(dc, p.x, p.y, NULL) == 0)
xpanic("error moving window origin in paintControlBackground()", GetLastError());
SendMessageW(parent, WM_PRINTCLIENT, (WPARAM) dc, PRF_CLIENT);
if (RestoreDC(dc, saved) == 0)
xpanic("error restoring DC info in paintControlBackground()", GetLastError());
}
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