88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
// 13 december 2014
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// damn winsock
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static void doselect(struct table *t, intptr_t row, intptr_t column)
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{
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RECT r, client;
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intptr_t oldrow;
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LONG width, height;
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struct rowcol rc;
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BOOL dovscroll;
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intptr_t i;
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intptr_t xpos;
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LONG clientWidth;
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oldrow = t->selectedRow;
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t->selectedRow = row;
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t->selectedColumn = column;
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if (GetClientRect(t->hwnd, &client) == 0)
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panic("error getting Table client rect in doselect()");
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client.top += t->headerHeight;
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height = rowht(t);
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// first vertically scroll to the new row to make it fully visible (or as visible as possible)
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if (t->selectedRow < t->vscrollpos)
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vscrollto(t, t->selectedRow);
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else {
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rc.row = t->selectedRow;
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rc.column = t->selectedColumn;
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// first assume entirely outside the client area
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dovscroll = TRUE;
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if (rowColumnToClientRect(t, rc, &r))
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// partially outside the client area?
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if (r.bottom <= client.bottom) // <= here since we are comparing bottoms (which are the first pixels outside the rectangle)
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dovscroll = FALSE;
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if (dovscroll)
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vscrollto(t, t->selectedRow - t->vpagesize + 1); // + 1 because apparently just t->selectedRow - t->vpagesize results in no scrolling (t->selectedRow - t->vpagesize == t->vscrollpos)...
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}
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// now see if the cell we want is to the left of offscreen, in which case scroll to its x-position
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xpos = 0;
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for (i = 0; i < t->selectedColumn; i++)
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xpos += columnWidth(t, i);
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if (xpos < t->hscrollpos)
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hscrollto(t, xpos);
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else while(1){break;
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// if the full cell is not visible, scroll to the right just enough to make it fully visible (or as visible as possible)
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width = columnWidth(t, t->selectedColumn);
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clientWidth = client.right - client.left;
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if (xpos + width < t->hscrollpos + clientWidth)
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// if the column is too wide, then just make it occupy the whole visible area (left-aligned)
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if (width > clientWidth)
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hscrollto(t, xpos);
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else
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hscrollby(t, clientWidth - width);
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}
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// now redraw the old and new /rows/
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// we do this after scrolling so the rectangles to be invalidated make sense
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r.left = client.left;
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r.right = client.right;
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if (oldrow != -1 && oldrow >= t->vscrollpos) {
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r.top = client.top + ((oldrow - t->vscrollpos) * height);
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r.bottom = r.top + height;
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if (InvalidateRect(t->hwnd, &r, TRUE) == 0)
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panic("error queueing previously selected row for redraw in doselect()");
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}
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// t->selectedRow must be visible by this point; we scrolled to it
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if (t->selectedRow != -1 && t->selectedRow != oldrow) {
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r.top = client.top + ((t->selectedRow - t->vscrollpos) * height);
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r.bottom = r.top + height;
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if (InvalidateRect(t->hwnd, &r, TRUE) == 0)
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panic("error queueing newly selected row for redraw in doselect()");
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}
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}
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// TODO which WM_xBUTTONDOWNs?
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HANDLER(mouseDownSelectHandler)
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{
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struct rowcol rc;
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rc = lParamToRowColumn(t, lParam);
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// don't check if lParamToRowColumn() returned row -1 or column -1; we want deselection behavior
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doselect(t, rc.row, rc.column);
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*lResult = 0;
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return TRUE;
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}
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