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// 17 july 2014
#include "winapi_windows.h"
#include "_cgo_export.h"
static LRESULT CALLBACK buttonSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR id, DWORD_PTR data)
{
switch (uMsg) {
case msgCOMMAND:
if (HIWORD(wParam) == BN_CLICKED) {
buttonClicked((void *) data);
return 0;
}
return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
case WM_NCDESTROY:
if ((*fv_RemoveWindowSubclass)(hwnd, buttonSubProc, id) == FALSE)
xpanic("error removing Button subclass (which was for its own event handler)", GetLastError());
return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
default:
return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
}
xmissedmsg("Button", "buttonSubProc()", uMsg);
return 0; // unreached
}
void setButtonSubclass(HWND hwnd, void *data)
{
if ((*fv_SetWindowSubclass)(hwnd, buttonSubProc, 0, (DWORD_PTR) data) == FALSE)
xpanic("error subclassing Button to give it its own event handler", GetLastError());
}
static LRESULT CALLBACK checkboxSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR id, DWORD_PTR data)
{
switch (uMsg) {
case msgCOMMAND:
if (HIWORD(wParam) == BN_CLICKED) {
WPARAM check;
// we didn't use BS_AUTOCHECKBOX (see controls_windows.go) so we have to manage the check state ourselves
check = BST_CHECKED;
if (SendMessage(hwnd, BM_GETCHECK, 0, 0) == BST_CHECKED)
check = BST_UNCHECKED;
SendMessage(hwnd, BM_SETCHECK, check, 0);
checkboxToggled((void *) data);
return 0;
}
return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
case WM_NCDESTROY:
if ((*fv_RemoveWindowSubclass)(hwnd, checkboxSubProc, id) == FALSE)
xpanic("error removing Checkbox subclass (which was for its own event handler)", GetLastError());
return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
default:
return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
}
xmissedmsg("Checkbox", "checkboxSubProc()", uMsg);
return 0; // unreached
}
void setCheckboxSubclass(HWND hwnd, void *data)
{
if ((*fv_SetWindowSubclass)(hwnd, checkboxSubProc, 0, (DWORD_PTR) data) == FALSE)
xpanic("error subclassing Checkbox to give it its own event handler", GetLastError());
}
BOOL checkboxChecked(HWND hwnd)
{
if (SendMessage(hwnd, BM_GETCHECK, 0, 0) == BST_UNCHECKED)
return FALSE;
return TRUE;
}
void checkboxSetChecked(HWND hwnd, BOOL c)
{
WPARAM check;
check = BST_CHECKED;
if (c == FALSE)
check = BST_UNCHECKED;
SendMessage(hwnd, BM_SETCHECK, check, 0);
}
static LRESULT CALLBACK textfieldSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR id, DWORD_PTR data)
{
switch (uMsg) {
case msgCOMMAND:
if (HIWORD(wParam) == EN_CHANGE) {
textfieldChanged((void *) data);
return 0;
}
return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
case WM_NCDESTROY:
if ((*fv_RemoveWindowSubclass)(hwnd, textfieldSubProc, id) == FALSE)
xpanic("error removing TextField subclass (which was for its own event handler)", GetLastError());
return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
default:
return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
}
xmissedmsg("TextField", "textfieldSubProc()", uMsg);
return 0; // unreached
}
void setTextFieldSubclass(HWND hwnd, void *data)
{
if ((*fv_SetWindowSubclass)(hwnd, textfieldSubProc, 0, (DWORD_PTR) data) == FALSE)
xpanic("error subclassing TextField to give it its own event handler", GetLastError());
}
void textfieldSetAndShowInvalidBalloonTip(HWND hwnd, WCHAR *text)
{
EDITBALLOONTIP ti;
ZeroMemory(&ti, sizeof (EDITBALLOONTIP));
ti.cbStruct = sizeof (EDITBALLOONTIP);
// this is required to show the error icon
// this probably should be localized...
ti.pszTitle = L"Invalid Input";
ti.pszText = text;
ti.ttiIcon = TTI_ERROR;
if (SendMessageW(hwnd, EM_SHOWBALLOONTIP, 0, (LPARAM) (&ti)) == FALSE)
xpanic("error showing TextField.Invalid() balloon tip", GetLastError());
if (MessageBeep(0xFFFFFFFF) == 0)
xpanic("error beeping in response to TextField.Invalid()", GetLastError());
}
void textfieldHideInvalidBalloonTip(HWND hwnd)
{
if (SendMessageW(hwnd, EM_HIDEBALLOONTIP, 0, 0) == FALSE)
xpanic("error hiding TextField.Invalid() balloon tip", GetLastError());
}
static LRESULT CALLBACK groupSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR id, DWORD_PTR data)
{
LRESULT lResult;
RECT r;
if (sharedWndProc(hwnd, uMsg, wParam, lParam, &lResult))
return lResult;
switch (uMsg) {
case WM_WINDOWPOSCHANGING:
case WM_WINDOWPOSCHANGED:
// don't use the WINDOWPOS rect here; the coordinates of the controls have to be in real client coordinates
if (GetClientRect(hwnd, &r) == 0)
xpanic("error getting client rect of Group for resizing its child Control", GetLastError());
groupResized((void *) data, r);
// and chain up
return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
case WM_NCDESTROY:
if ((*fv_RemoveWindowSubclass)(hwnd, groupSubProc, id) == FALSE)
xpanic("error removing Group subclass (which was for its own event handler)", GetLastError());
return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
default:
return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
}
xmissedmsg("Group", "groupSubProc()", uMsg);
return 0; // unreached
}
void setGroupSubclass(HWND hwnd, void *data)
{
if ((*fv_SetWindowSubclass)(hwnd, groupSubProc, 0, (DWORD_PTR) data) == FALSE)
xpanic("error subclassing Group to give it its own event handler", GetLastError());
}
// provided for cgo's benefit
LPWSTR xUPDOWN_CLASSW = UPDOWN_CLASSW;
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