65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
/* 25 july 2014 */
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#include "winapi_windows.h"
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#include "_cgo_export.h"
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/* provided for cgo's benefit */
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LPCWSTR xWC_TABCONTROL = WC_TABCONTROL;
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static LRESULT CALLBACK tabSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR id, DWORD_PTR data)
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{
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NMHDR *nmhdr = (NMHDR *) lParam;
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LRESULT r;
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switch (uMsg) {
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case msgNOTIFY:
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switch (nmhdr->code) {
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case TCN_SELCHANGING:
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r = SendMessageW(hwnd, TCM_GETCURSEL, 0, 0);
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if (r == (LRESULT) -1) /* no tab currently selected */
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return FALSE;
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tabChanging((void *) data, r);
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return FALSE; /* allow change */
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case TCN_SELCHANGE:
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tabChanged((void *) data, SendMessageW(hwnd, TCM_GETCURSEL, 0, 0));
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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, tabSubProc, id) == FALSE)
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xpanic("error removing Tab 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("Tab", "tabSubProc()", uMsg);
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return 0; /* unreached */
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}
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void setTabSubclass(HWND hwnd, void *data)
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{
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if ((*fv_SetWindowSubclass)(hwnd, tabSubProc, 0, (DWORD_PTR) data) == FALSE)
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xpanic("error subclassing Tab to give it its own event handler", GetLastError());
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}
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void tabAppend(HWND hwnd, LPCWSTR name)
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{
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TCITEM item;
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LRESULT n;
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ZeroMemory(&item, sizeof (TCITEM));
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item.mask = TCIF_TEXT;
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/* TODO the C means const; change everything to use LPWSTR instead */
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item.pszText = name;
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/* MSDN's example code uses the first invalid index directly for this */
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n = SendMessageW(hwnd, TCM_GETITEMCOUNT, 0, 0);
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if (SendMessageW(hwnd, TCM_INSERTITEM, (WPARAM) n, (LPARAM) (&item)) == (LRESULT) -1)
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xpanic("error adding tab to Tab", GetLastError());
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}
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void tabGetContentRect(HWND hwnd, RECT *r)
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{
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/* not &r; already a pointer (thanks MindChild in irc.efnet.net/#winprog for spotting my failure) */
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SendMessageW(hwnd, TCM_ADJUSTRECT, FALSE, (LPARAM) r);
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}
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