PixelSize
RowFormWidget::GetMaximumSize() const
{
const UPixelScalar value_width =
look.text_font->TextSize(_T("Foo Bar Foo Bar")).cx * 2;
PixelSize size{ PixelScalar(GetRecommendedCaptionWidth() + value_width), 0 };
for (auto i = rows.begin(), end = rows.end(); i != end; ++i)
size.cy += i->GetMaximumHeight();
return size;
}
/**
* Will this row grow when there is excess screen space?
*/
bool IsElastic(const DialogLook &look, bool vertical) const {
return GetMaximumHeight(look, vertical)
> GetMinimumHeight(look, vertical);
}
void
RowFormWidget::UpdateLayout()
{
PixelRect current_rect = GetWindow()->GetClientRect();
const unsigned total_width = current_rect.right - current_rect.left;
const unsigned total_height = current_rect.bottom - current_rect.top;
current_rect.bottom = current_rect.top;
const bool expert = UIGlobals::GetDialogSettings().expert;
/* first row traversal: count the number of "elastic" rows and
determine the minimum total height */
unsigned min_height = 0;
unsigned n_elastic = 0;
unsigned caption_width = 0;
for (auto i = rows.begin(), end = rows.end(); i != end; ++i) {
if (!i->available || (i->expert && !expert))
continue;
min_height += i->GetMinimumHeight();
if (i->IsElastic())
++n_elastic;
if (i->type == Row::Type::EDIT) {
unsigned cw = i->GetControl().GetRecommendedCaptionWidth();
if (cw > caption_width)
caption_width = cw;
}
}
if (caption_width * 3 > total_width * 2)
caption_width = total_width * 2 / 3;
/* how much excess height in addition to the minimum height? */
unsigned excess_height = min_height < total_height
? total_height - min_height
: 0;
/* second row traversal: now move and resize the rows */
for (auto i = rows.begin(), end = rows.end(); i != end; ++i) {
if (i->type == Row::Type::DUMMY)
continue;
Window &window = i->GetWindow();
if (!i->available) {
window.Hide();
continue;
}
if (i->expert) {
if (!expert) {
window.Hide();
continue;
}
if (i->visible)
window.Show();
}
if (caption_width > 0 && i->type == Row::Type::EDIT &&
i->GetControl().HasCaption())
i->GetControl().SetCaptionWidth(caption_width);
/* determine this row's height */
UPixelScalar height = i->GetMinimumHeight();
if (excess_height > 0 && i->IsElastic()) {
assert(n_elastic > 0);
/* distribute excess height among all elastic rows */
unsigned grow_height = excess_height / n_elastic;
if (grow_height > 0) {
height += grow_height;
const UPixelScalar max_height = i->GetMaximumHeight();
if (height > max_height) {
/* never grow beyond declared maximum height */
height = max_height;
grow_height = max_height - height;
}
excess_height -= grow_height;
}
--n_elastic;
}
/* finally move and resize */
NextControlRect(current_rect, height);
window.Move(current_rect);
}
assert(excess_height == 0 || n_elastic == 0);
}
/**
* Will this row grow when there is excess screen space?
*/
bool IsElastic() const {
return GetMaximumHeight() > GetMinimumHeight();
}
