207 lines
6.6 KiB
C
207 lines
6.6 KiB
C
// 7 january 2015
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// TODO
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// - should tablePanic be CALLBACK or some other equivalent macro? and definitely export initTable somehow, but which alias macro to use?
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// - make panic messages grammatically correct ("Table error: adding...")
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// - make access to column widths consistent; see whether HDITEMW.cxy == (ITEMRECT.right - ITEMRECT.left)
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// - make sure all uses of t->headerHeight are ADDED to RECT.top
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// - WM_THEMECHANGED, etc.
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// - see if vertical centering is really what we want or if we just want to offset by a few pixels or so
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// - going right from column 0 to column 2 with the right arrow key deselects
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// - make sure all error messages involving InvalidateRect() are consistent with regards to "redrawing" and "queueing for redraw"
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// - collect all resize-related tasks in a single function (so things like adding columns will refresh everything, not just horizontal scrolls; also would fix initial coordinates)
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// - checkbox columns don't clip to the column width
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// - send standard notification codes
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#define tableWindowClass L"gouitable"
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// start at WM_USER + 20 just in case for whatever reason we ever get the various dialog manager messages (see also http://blogs.msdn.com/b/oldnewthing/archive/2003/10/21/55384.aspx)
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enum {
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// wParam - one of the type constants
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// lParam - column name as a Unicode string
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tableAddColumn = WM_USER + 20,
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};
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enum {
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tableColumnText,
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tableColumnImage,
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tableColumnCheckbox,
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nTableColumnTypes,
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};
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// notification codes
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// note that these are positive; see http://blogs.msdn.com/b/oldnewthing/archive/2009/08/21/9877791.aspx
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// each of these is of type tableNM
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// all fields except data will always be set
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enum {
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// data parameter is always 0
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// for tableColumnText return should be WCHAR *
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// for tableColumnImage return should be HBITMAP
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// for tableColumnCheckbox return is nonzero for checked, zero for unchecked
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tableNotificationGetCellData,
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// data parameter is pointer, same as tableNotificationGetCellData
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// not sent for checkboxes
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// no return
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tableNotificationFinishedWithCellData,
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// data is zero
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// no return
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tableNotificationCellCheckboxToggled,
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};
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typedef struct tableNM tableNM;
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struct tableNM {
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NMHDR nmhdr;
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intptr_t row;
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intptr_t column;
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int columnType;
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uintptr_t data;
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};
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static void (*tablePanic)(const char *, DWORD) = NULL;
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#define panic(...) (*tablePanic)(__VA_ARGS__, GetLastError())
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#define abort $$$$ // prevent accidental use of abort()
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static BOOL (*WINAPI tableTrackMouseEvent)(LPTRACKMOUSEEVENT);
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// forward declaration
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struct tableAcc;
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struct table {
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HWND hwnd;
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HWND header;
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HFONT font;
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intptr_t nColumns;
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int *columnTypes;
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intptr_t width;
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intptr_t headerHeight;
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intptr_t hscrollpos; // in logical units
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intptr_t hpagesize; // in logical units
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intptr_t count;
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intptr_t vscrollpos; // in rows
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intptr_t vpagesize; // in rows
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int hwheelCarry;
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int vwheelCarry;
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intptr_t selectedRow;
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intptr_t selectedColumn;
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HTHEME theme;
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int checkboxWidth;
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int checkboxHeight;
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BOOL checkboxMouseOverLast;
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LPARAM checkboxMouseOverLastPoint;
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BOOL checkboxMouseDown;
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intptr_t checkboxMouseDownRow;
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intptr_t checkboxMouseDownColumn;
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struct tableAcc *ta;
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};
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// forward declaration (TODO needed?)
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static LRESULT notify(struct table *, UINT, intptr_t, intptr_t, uintptr_t);
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#include "util.h"
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#include "coord.h"
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#include "scroll.h"
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#include "hscroll.h"
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#include "vscroll.h"
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#include "select.h"
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#include "checkboxes.h"
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#include "events.h"
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#include "header.h"
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#include "children.h"
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#include "resize.h"
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#include "draw.h"
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#include "api.h"
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#include "accessibility.h"
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static const handlerfunc handlers[] = {
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eventHandlers,
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childrenHandlers,
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resizeHandler,
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drawHandlers,
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apiHandlers,
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hscrollHandler,
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vscrollHandler,
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accessibilityHandler,
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NULL,
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};
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static void initDummyTableStuff(struct table *t)
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{
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t->count = 100;
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t->selectedRow = 2;
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t->selectedColumn = 1;
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}
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static LRESULT CALLBACK tableWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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struct table *t;
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LRESULT lResult;
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t = (struct table *) GetWindowLongPtrW(hwnd, GWLP_USERDATA);
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if (t == NULL) {
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// we have to do things this way because creating the header control will fail mysteriously if we create it first thing
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// (which is fine; we can get the parent hInstance this way too)
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// we use WM_CREATE because we have to use WM_DESTROY to destroy the header; we can't do it in WM_NCDESTROY because Windows will have destroyed it for us by then, and let's match message pairs to be safe
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if (uMsg == WM_CREATE) {
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CREATESTRUCTW *cs = (CREATESTRUCTW *) lParam;
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t = (struct table *) tableAlloc(sizeof (struct table), "error allocating internal Table data structure");
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t->hwnd = hwnd;
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makeHeader(t, cs->hInstance);
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t->selectedRow = -1;
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t->selectedColumn = -1;
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loadCheckboxThemeData(t);
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t->ta = newTableAcc(t);
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initDummyTableStuff(t);
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SetWindowLongPtrW(hwnd, GWLP_USERDATA, (LONG_PTR) t);
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}
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// even if we did the above, fall through
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return DefWindowProcW(hwnd, uMsg, wParam, lParam);
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}
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if (uMsg == WM_DESTROY) {
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printf("destroy\n");
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// TODO free appropriate (after figuring this part out) components of t
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// TODO send EVENT_OBJECT_DESTROY events to accessibility listeners (when appropriate); see the note on proxy objects as well
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freeTableAcc(t->ta);
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t->ta = NULL;
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freeCheckboxThemeData(t);
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destroyHeader(t);
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tableFree(t, "error allocating internal Table data structure");
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return DefWindowProcW(hwnd, uMsg, wParam, lParam);
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}
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if (runHandlers(handlers, t, uMsg, wParam, lParam, &lResult))
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return lResult;
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return DefWindowProcW(hwnd, uMsg, wParam, lParam);
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}
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static void deftablePanic(const char *msg, DWORD lastError)
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{
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fprintf(stderr, "Table error: %s (last error %d)\n", msg, lastError);
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fprintf(stderr, "This is the default Table error handler function; programs that use Table should provide their own instead.\nThe program will now break into the debugger.\n");
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DebugBreak();
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}
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// TODO have hInstance passed in
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void initTable(void (*panicfunc)(const char *msg, DWORD lastError), BOOL (*WINAPI tme)(LPTRACKMOUSEEVENT))
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{
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WNDCLASSW wc;
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tablePanic = panicfunc;
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if (tablePanic == NULL)
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tablePanic = deftablePanic;
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if (tme == NULL)
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// TODO errorless version
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panic("must provide a TrackMouseEvent() to initTable()");
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tableTrackMouseEvent = tme;
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ZeroMemory(&wc, sizeof (WNDCLASSW));
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wc.lpszClassName = tableWindowClass;
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wc.lpfnWndProc = tableWndProc;
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wc.hCursor = LoadCursorW(NULL, IDC_ARROW);
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wc.hIcon = LoadIconW(NULL, IDI_APPLICATION);
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wc.hbrBackground = (HBRUSH) (COLOR_WINDOW + 1); // TODO correct?
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wc.style = CS_HREDRAW | CS_VREDRAW;
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wc.hInstance = GetModuleHandle(NULL);
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if (RegisterClassW(&wc) == 0)
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panic("error registering Table window class");
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}
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