246 lines
6.7 KiB
C
246 lines
6.7 KiB
C
// 16 august 2014
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enum {
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checkboxStateChecked = 1 << 0,
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checkboxStateHot = 1 << 1,
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checkboxStatePushed = 1 << 2,
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checkboxnStates = 1 << 3,
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};
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// TODO actually make this
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#define panichresult(a, b) panic(a)
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static UINT dfcState(int cbstate)
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{
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UINT ret;
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ret = DFCS_BUTTONCHECK;
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if ((cbstate & checkboxStateChecked) != 0)
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ret |= DFCS_CHECKED;
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if ((cbstate & checkboxStateHot) != 0)
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ret |= DFCS_HOT;
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if ((cbstate & checkboxStatePushed) != 0)
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ret |= DFCS_PUSHED;
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return ret;
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}
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static void drawFrameControlCheckbox(HDC dc, RECT *r, int cbState)
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{
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if (DrawFrameControl(dc, r, DFC_BUTTON, dfcState(cbState)) == 0)
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panic("error drawing Table checkbox image with DrawFrameControl()");
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}
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static void getFrameControlCheckboxSize(HDC dc, int *width, int *height)
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{
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// there's no real metric around
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// let's use SM_CX/YSMICON and hope for the best
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*width = GetSystemMetrics(SM_CXSMICON);
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*height = GetSystemMetrics(SM_CYSMICON);
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}
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static int themestates[checkboxnStates] = {
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CBS_UNCHECKEDNORMAL, // 0
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CBS_CHECKEDNORMAL, // checked
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CBS_UNCHECKEDHOT, // hot
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CBS_CHECKEDHOT, // checked | hot
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CBS_UNCHECKEDPRESSED, // pushed
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CBS_CHECKEDPRESSED, // checked | pushed
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CBS_UNCHECKEDPRESSED, // hot | pushed
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CBS_CHECKEDPRESSED, // checked | hot | pushed
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};
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static SIZE getStateSize(HDC dc, int cbState, HTHEME theme)
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{
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SIZE s;
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HRESULT res;
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res = GetThemePartSize(theme, dc, BP_CHECKBOX, themestates[cbState], NULL, TS_DRAW, &s);
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if (res != S_OK)
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panichresult("error getting theme part size for Table checkboxes", res);
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return s;
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}
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static void drawThemeCheckbox(HDC dc, RECT *r, int cbState, HTHEME theme)
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{
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HRESULT res;
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res = DrawThemeBackground(theme, dc, BP_CHECKBOX, themestates[cbState], r, NULL);
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if (res != S_OK)
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panichresult("error drawing Table checkbox image from theme", res);
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}
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static void getThemeCheckboxSize(HDC dc, int *width, int *height, HTHEME theme)
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{
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SIZE size;
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int cbState;
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size = getStateSize(dc, 0, theme);
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for (cbState = 1; cbState < checkboxnStates; cbState++) {
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SIZE against;
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against = getStateSize(dc, cbState, theme);
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if (size.cx != against.cx || size.cy != against.cy)
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// TODO make this use a no-information (or two ints) panic()
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panic("size mismatch in Table checkbox states");
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}
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*width = (int) size.cx;
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*height = (int) size.cy;
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}
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static void drawCheckbox(struct table *t, HDC dc, RECT *r, int cbState)
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{
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if (t->theme != NULL) {
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drawThemeCheckbox(dc, r, cbState, t->theme);
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return;
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}
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drawFrameControlCheckbox(dc, r, cbState);
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}
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static void freeCheckboxThemeData(struct table *t)
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{
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if (t->theme != NULL) {
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HRESULT res;
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res = CloseThemeData(t->theme);
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if (res != S_OK)
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panichresult("error closing Table checkbox theme", res);
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t->theme = NULL;
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}
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}
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static void loadCheckboxThemeData(struct table *t)
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{
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HDC dc;
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freeCheckboxThemeData(t);
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dc = GetDC(t->hwnd);
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if (dc == NULL)
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panic("error getting Table DC for loading checkbox theme data");
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// ignore error; if it can't be done, we can fall back to DrawFrameControl()
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if (t->theme == NULL) // try to open the theme
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t->theme = OpenThemeData(t->hwnd, L"button");
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if (t->theme != NULL) // use the theme
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getThemeCheckboxSize(dc, &(t->checkboxWidth), &(t->checkboxHeight), t->theme);
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else // couldn't open; fall back
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getFrameControlCheckboxSize(dc, &(t->checkboxWidth), &(t->checkboxHeight));
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if (ReleaseDC(t->hwnd, dc) == 0)
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panic("error releasing Table DC for loading checkbox theme data");
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}
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static void redrawCheckboxRect(struct table *t, LPARAM lParam)
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{
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struct rowcol rc;
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RECT r;
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rc = lParamToRowColumn(t, lParam);
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if (rc.row == -1 && rc.column == -1)
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return;
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if (t->columnTypes[rc.column] != tableColumnCheckbox)
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return;
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if (!rowColumnToClientRect(t, rc, &r))
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return;
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// TODO only the checkbox rect?
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if (InvalidateRect(t->hwnd, &r, TRUE) == 0)
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panic("error redrawing Table checkbox rect for mouse events");
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}
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HANDLER(checkboxMouseMoveHandler)
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{
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// don't actually check to see if the mouse is in the checkbox rect
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// if there's scrolling without mouse movement, that will change
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// instead, drawCell() will handle it
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if (!t->checkboxMouseOverLast) {
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t->checkboxMouseOverLast = TRUE;
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retrack(t);
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} else
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redrawCheckboxRect(t, t->checkboxMouseOverLastPoint);
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t->checkboxMouseOverLastPoint = lParam;
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redrawCheckboxRect(t, t->checkboxMouseOverLastPoint);
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*lResult = 0;
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return TRUE;
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}
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HANDLER(checkboxMouseLeaveHandler)
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{
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if (t->checkboxMouseOverLast)
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redrawCheckboxRect(t, t->checkboxMouseOverLastPoint);
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// TODO remember what I wanted to do here in the case of a held mouse button
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t->checkboxMouseOverLast = FALSE;
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*lResult = 0;
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return TRUE;
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}
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HANDLER(checkboxMouseDownHandler)
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{
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struct rowcol rc;
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RECT r;
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POINT pt;
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rc = lParamToRowColumn(t, lParam);
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if (rc.row == -1 || rc.column == -1)
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return FALSE;
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if (t->columnTypes[rc.column] != tableColumnCheckbox)
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return FALSE;
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if (!rowColumnToClientRect(t, rc, &r))
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return FALSE;
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toCheckboxRect(t, &r, 0);
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pt.x = GET_X_LPARAM(lParam);
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pt.y = GET_Y_LPARAM(lParam);
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if (PtInRect(&r, pt) == 0)
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return FALSE;
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t->checkboxMouseDown = TRUE;
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t->checkboxMouseDownRow = rc.row;
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t->checkboxMouseDownColumn = rc.column;
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// TODO redraw the whole cell?
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if (InvalidateRect(t->hwnd, &r, TRUE) == 0)
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panic("error redrawing Table checkbox after mouse down");
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*lResult = 0;
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return TRUE;
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}
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HANDLER(checkboxMouseUpHandler)
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{
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struct rowcol rc;
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RECT r;
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POINT pt;
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if (!t->checkboxMouseDown)
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return FALSE;
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// the logic behind goto wrongUp is that the mouse must be released on the same checkbox
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rc = lParamToRowColumn(t, lParam);
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if (rc.row == -1 || rc.column == -1)
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goto wrongUp;
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if (rc.row != t->checkboxMouseDownRow || rc.column != t->checkboxMouseDownColumn)
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goto wrongUp;
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if (t->columnTypes[rc.column] != tableColumnCheckbox)
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goto wrongUp;
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if (!rowColumnToClientRect(t, rc, &r))
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goto wrongUp;
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toCheckboxRect(t, &r, 0);
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pt.x = GET_X_LPARAM(lParam);
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pt.y = GET_Y_LPARAM(lParam);
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if (PtInRect(&r, pt) == 0)
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goto wrongUp;
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notify(t, tableNotificationCellCheckboxToggled, rc.row, rc.column, 0);
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t->checkboxMouseDown = FALSE;
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// TODO redraw the whole cell?
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if (InvalidateRect(t->hwnd, &r, TRUE) == 0)
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panic("error redrawing Table checkbox after mouse up");
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*lResult = 0;
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return TRUE;
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wrongUp:
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if (t->checkboxMouseDown) {
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rc.row = t->checkboxMouseDownRow;
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rc.column = t->checkboxMouseDownColumn;
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if (rowColumnToClientRect(t, rc, &r))
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// TODO only the checkbox rect?
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if (InvalidateRect(t->hwnd, &r, TRUE) == 0)
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panic("error redrawing Table checkbox rect for aborted mouse up event");
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}
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// if we landed on another checkbox, be sure to draw that one too
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if (t->checkboxMouseOverLast)
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redrawCheckboxRect(t, t->checkboxMouseOverLastPoint);
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t->checkboxMouseDown = FALSE;
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return FALSE; // TODO really?
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}
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