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LibGUI: Add min/max sizes to GUI::Widget

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This patch adds min_size and max_size properties to GUI::Widget. These
can also be accessed as min_width/min_height and max_width/max_height.

Layouts will respect these constraints and size widgets accordingly.
This commit is contained in:
Andreas Kling 2020-12-29 18:22:51 +01:00
parent 91b65ec328
commit 60e3f685db
3 changed files with 95 additions and 20 deletions
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72
Libraries/LibGUI/BoxLayout.cpp
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@ -61,8 +61,6 @@ void BoxLayout::run(Widget& widget)
if (should_log)
dbgprintf("BoxLayout: Starting with available size: %s\n", available_size.to_string().characters());
Optional<size_t> last_entry_with_automatic_size;
for (size_t i = 0; i < m_entries.size(); ++i) {
auto& entry = m_entries[i];
if (entry.type == Entry::Type::Spacer) {
@ -83,8 +81,6 @@ void BoxLayout::run(Widget& widget)
if (should_log)
dbgprintf("BoxLayout: Available size after: %s\n", available_size.to_string().characters());
++number_of_entries_with_fixed_size;
} else {
last_entry_with_automatic_size = i;
}
available_size -= { spacing(), spacing() };
}
@ -102,21 +98,21 @@ void BoxLayout::run(Widget& widget)
dbgprintf("BoxLayout: available_size=%s, fixed=%d, fill=%d\n", available_size.to_string().characters(), number_of_entries_with_fixed_size, number_of_entries_with_automatic_size);
Gfx::IntSize automatic_size;
Gfx::IntSize automatic_size_for_last_entry;
int remaining_size = 0;
int number_of_entries_with_automatic_size_remaining = number_of_entries_with_automatic_size;
if (number_of_entries_with_automatic_size) {
if (m_orientation == Orientation::Horizontal) {
automatic_size.set_width(available_size.width() / number_of_entries_with_automatic_size);
automatic_size.set_height(widget.height());
automatic_size_for_last_entry.set_width(available_size.width() - (number_of_entries_with_automatic_size - 1) * automatic_size.width());
automatic_size_for_last_entry.set_height(widget.height());
remaining_size = available_size.width();
} else {
automatic_size.set_width(widget.width());
automatic_size.set_height(available_size.height() / number_of_entries_with_automatic_size);
automatic_size_for_last_entry.set_width(widget.width());
automatic_size_for_last_entry.set_height(available_size.height() - (number_of_entries_with_automatic_size - 1) * automatic_size.height());
remaining_size = available_size.height();
}
}
@ -131,6 +127,7 @@ void BoxLayout::run(Widget& widget)
if (entry.type == Entry::Type::Spacer) {
current_x += automatic_size.width();
current_y += automatic_size.height();
continue;
}
if (!entry.widget)
@ -144,36 +141,71 @@ void BoxLayout::run(Widget& widget)
}
ASSERT(entry.widget);
if (last_entry_with_automatic_size.has_value() && i == last_entry_with_automatic_size.value()) {
rect.set_size(automatic_size_for_last_entry);
if (entry.widget->size_policy(Orientation::Vertical) == SizePolicy::Fixed) {
rect.set_width(widget.width());
rect.set_height(entry.widget->preferred_size().height());
} else {
rect.set_size(automatic_size);
if (orientation() == Orientation::Horizontal)
rect.set_height(widget.height());
else
rect.set_height(remaining_size / number_of_entries_with_automatic_size_remaining);
}
if (entry.widget->size_policy(Orientation::Vertical) == SizePolicy::Fixed)
rect.set_height(entry.widget->preferred_size().height());
if (entry.widget->size_policy(Orientation::Horizontal) == SizePolicy::Fixed)
if (entry.widget->size_policy(Orientation::Horizontal) == SizePolicy::Fixed) {
rect.set_width(entry.widget->preferred_size().width());
rect.set_height(widget.height());
} else {
if (orientation() == Orientation::Horizontal)
rect.set_width(remaining_size / number_of_entries_with_automatic_size_remaining);
else
rect.set_width(widget.width());
}
if (orientation() == Orientation::Horizontal) {
if (entry.widget->size_policy(Orientation::Vertical) == SizePolicy::Fill)
rect.set_height(widget.height() - margins().top() - margins().bottom());
rect.center_vertically_within(widget.rect());
} else {
if (entry.widget->size_policy(Orientation::Horizontal) == SizePolicy::Fill)
rect.set_width(widget.width() - margins().left() - margins().right());
rect.center_horizontally_within(widget.rect());
}
// Apply min/max constraints to filled widgets.
if (entry.widget->size_policy(Orientation::Horizontal) == SizePolicy::Fill) {
if (entry.widget->min_size().width() >= 0)
rect.set_width(max(entry.widget->min_size().width(), rect.width()));
if (entry.widget->max_size().width() >= 0)
rect.set_width(min(entry.widget->max_size().width(), rect.width()));
}
if (entry.widget->size_policy(Orientation::Vertical) == SizePolicy::Fill) {
if (entry.widget->min_size().height() >= 0)
rect.set_height(max(entry.widget->min_size().height(), rect.height()));
if (entry.widget->max_size().height() >= 0)
rect.set_height(min(entry.widget->max_size().height(), rect.height()));
}
if (orientation() == Orientation::Horizontal)
rect.center_vertically_within(widget.rect());
else
rect.center_horizontally_within(widget.rect());
if (should_log)
dbgprintf("BoxLayout: apply, %s{%p} <- %s\n", entry.widget->class_name(), entry.widget.ptr(), rect.to_string().characters());
entry.widget->set_relative_rect(rect);
if (orientation() == Orientation::Horizontal)
if (orientation() == Orientation::Horizontal) {
if (entry.widget->size_policy(Orientation::Horizontal) == SizePolicy::Fill) {
remaining_size -= rect.width();
--number_of_entries_with_automatic_size_remaining;
}
current_x += rect.width() + spacing();
else
} else {
if (entry.widget->size_policy(Orientation::Vertical) == SizePolicy::Fill) {
remaining_size -= rect.height();
--number_of_entries_with_automatic_size_remaining;
}
current_y += rect.height() + spacing();
}
}
}
}