81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/* 17 july 2014 */
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#include "winapi_windows.h"
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#include "_cgo_export.h"
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static LRESULT CALLBACK buttonSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR id, DWORD_PTR data)
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{
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switch (uMsg) {
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case msgCOMMAND:
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if (HIWORD(wParam) == BN_CLICKED) {
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buttonClicked((void *) data);
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return 0;
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}
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return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
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case WM_NCDESTROY:
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if ((*fv_RemoveWindowSubclass)(hwnd, buttonSubProc, id) == FALSE)
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xpanic("error removing Button subclass (which was for its own event handler)", GetLastError());
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return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
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default:
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return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
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}
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xmissedmsg("Button", "buttonSubProc()", uMsg);
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return 0; /* unreached */
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}
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void setButtonSubclass(HWND hwnd, void *data)
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{
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if ((*fv_SetWindowSubclass)(hwnd, buttonSubProc, 0, (DWORD_PTR) data) == FALSE)
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xpanic("error subclassing Button to give it its own event handler", GetLastError());
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}
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static LRESULT CALLBACK checkboxSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR id, DWORD_PTR data)
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{
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switch (uMsg) {
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case msgCOMMAND:
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if (HIWORD(wParam) == BN_CLICKED) {
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WPARAM check;
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/* we didn't use BS_AUTOCHECKBOX (see controls_windows.go) so we have to manage the check state ourselves */
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check = BST_CHECKED;
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if (SendMessage(hwnd, BM_GETCHECK, 0, 0) == BST_CHECKED)
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check = BST_UNCHECKED;
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SendMessage(hwnd, BM_SETCHECK, check, 0);
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checkboxToggled((void *) data);
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return 0;
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}
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return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
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case WM_NCDESTROY:
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if ((*fv_RemoveWindowSubclass)(hwnd, checkboxSubProc, id) == FALSE)
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xpanic("error removing Checkbox subclass (which was for its own event handler)", GetLastError());
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return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
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default:
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return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
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}
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xmissedmsg("Checkbox", "checkboxSubProc()", uMsg);
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return 0; /* unreached */
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}
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void setCheckboxSubclass(HWND hwnd, void *data)
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{
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if ((*fv_SetWindowSubclass)(hwnd, checkboxSubProc, 0, (DWORD_PTR) data) == FALSE)
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xpanic("error subclassing Checkbox to give it its own event handler", GetLastError());
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}
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BOOL checkboxChecked(HWND hwnd)
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{
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if (SendMessage(hwnd, BM_GETCHECK, 0, 0) == BST_UNCHECKED)
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return FALSE;
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return TRUE;
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}
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void checkboxSetChecked(HWND hwnd, BOOL c)
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{
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WPARAM check;
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check = BST_CHECKED;
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if (c == FALSE)
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check = BST_UNCHECKED;
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SendMessage(hwnd, BM_SETCHECK, check, 0);
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}
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