// Update desired size of the button. If the size changes, trigger layout
// (which will in turn request repaints of affected areas)
// To keep size of the button stable (to avoid re-layouts) we use font
// line spacing to be the height of the button, even if text is empty.
// Note: it might be that for some cases button with no text should collapse
// in size but we don't have a need for that yet
void Button::RecalculateSize(bool repaintIfSizeDidntChange)
{
Size prevSize = desiredSize;
desiredSize = GetBorderAndPaddingSize(cachedStyle);
Graphics *gfx = AllocGraphicsForMeasureText();
CachedStyle *s = cachedStyle;
Font *font = GetCachedFont(s->fontName, s->fontSize, s->fontWeight);
textDx = 0;
float fontDy = font->GetHeight(gfx);
RectF bbox;
if (text) {
bbox = MeasureText(gfx, font, text);
textDx = (size_t)bbox.Width; // TODO: round up?
// bbox shouldn't be bigger than fontDy. We apply magic adjustment because
// bbox is bigger in n-th decimal point
CrashIf(fontDy + .5f < bbox.Height);
}
desiredSize.Width += textDx;
desiredSize.Height += (INT)fontDy; // TODO: round up?
FreeGraphicsForMeasureText(gfx);
if (!prevSize.Equals(desiredSize))
RequestLayout(this);
else if (repaintIfSizeDidntChange)
RequestRepaint(this);
}
HFONT CachedFont::GetHFont() {
if (!hFont) {
LOGFONTW lf;
// TODO: Graphics is probably only used for metrics,
// so this might not be 100% correct (e.g. 2 monitors with different DPIs?)
// but previous code wasn't much better
Graphics *gfx = AllocGraphicsForMeasureText();
Status status = font->GetLogFontW(gfx, &lf);
FreeGraphicsForMeasureText(gfx);
CrashIf(status != Ok);
hFont = CreateFontIndirectW(&lf);
CrashIf(!hFont);
}
return hFont;
}
// Update desired size of the button. If the size changes, trigger layout
// (which will in turn request repaints of affected areas)
// To keep size of the button stable (to avoid re-layouts) we use font
// line spacing to be the height of the button, even if text is empty.
// Note: it might be that for some cases button with no text should collapse
// in size but we don't have a need for that yet
void Button::RecalculateSize(bool repaintIfSizeDidntChange)
{
Size prevSize = desiredSize;
desiredSize = GetBorderAndPaddingSize(cachedStyle);
Graphics *gfx = AllocGraphicsForMeasureText();
CachedStyle *s = cachedStyle;
Font *font = GetCachedFont(s->fontName, s->fontSize, s->fontWeight);
textDx = 0;
float fontDy = font->GetHeight(gfx);
RectF bbox;
if (text) {
bbox = MeasureText(gfx, font, text);
textDx = CeilI(bbox.Width);
// I theorize that bbox shouldn't be bigger than fontDy. However, in practice
// it is (e.g. for Lucida Grande and text "Page: 0 / 0", bbox.Dy is 19.00
// and fontDy is 18.11). I still want to know if the difference gets even bigger
// than that
float maxDiff = 1.f;
if (bbox.Height > fontDy + maxDiff) {
fontDy = bbox.Height;
float diff = fontDy + maxDiff - bbox.Height;
char *fontName = str::conv::ToUtf8(s->fontName);
char *tmp = str::conv::ToUtf8(text);
CrashLogFmt("fontDy=%.2f, bbox.Height=%.2f, diff=%.2f (should be > 0) font: %s, text='%s'\r\n", (float)fontDy, (float)bbox.Height, diff, fontName, tmp);
CrashIf(diff < 0);
}
}
desiredSize.Width += textDx;
desiredSize.Height += CeilI(fontDy);
FreeGraphicsForMeasureText(gfx);
if (!prevSize.Equals(desiredSize))
RequestLayout(this);
else if (repaintIfSizeDidntChange)
RequestRepaint(this);
}