45 lines
1.8 KiB
C
45 lines
1.8 KiB
C
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// 8 january 2015
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// Whenever a number of things in the Table changes, the update() function needs to be called to update any metrics and scrolling positions.
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// The control font changing is the big one, as that comes with a flag that decides whether or not to redraw everything. We'll need to respect that here.
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// TODO actually use redraw here
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static void update(struct table *t, int redraw)
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{
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RECT client;
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intptr_t i;
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intptr_t height;
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// before we do anything we need the client rect
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if (GetClientRect(t->hwnd, &client) == 0)
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panic("error getting Table client rect in update()");
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// the first step is to figure out how wide the whole table is
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// TODO count dividers?
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t->width = 0;
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for (i = 0; i < t->nColumns; i++)
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t->width += columnWidth(t, i);
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// now we need to figure out how much of the width of the table can be seen at once
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t->hpagesize = client.right - client.left;
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// this part is critical: if we resize the columns to less than the client area width, then the following hscrollby() will make t->hscrollpos negative, which does very bad things
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// we do this regardless of which of the two has changed, just to be safe
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if (t->hpagesize > t->width)
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t->hpagesize = t->width;
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// now we do a dummy horizontal scroll to apply the new width and horizontal page size
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// this will also reposition and resize the header (the latter in case the font changed), which will be important for the next step
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hscrollby(t, 0);
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// now that we have the new height of the header, we can fix up vertical scrolling
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// so let's take the header height away from the client area
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client.top += t->headerHeight;
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// and update our page size appropriately
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height = client.bottom - client.top;
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t->vpagesize = height / rowht(t);
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// and do a dummy vertical scroll to apply that
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vscrollby(t, 0);
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// TODO invalidate /everything/?
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}
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