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LibGUI: Support double-click resizing multi-column TreeViews

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thankyouverycool 2021-03-18 22:37:52 -04:00 committed by Andreas Kling
parent 2365e06b12
commit bf86676272
Notes: sideshowbarker 2024-07-18 21:13:48 +09:00 
Author: https://github.com/thankyouverycool
Commit: https://github.com/SerenityOS/serenity/commit/bf866762726
Pull-request: https://github.com/SerenityOS/serenity/pull/5870
2 changed files with 42 additions and 0 deletions
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41
Userland/Libraries/LibGUI/TreeView.cpp
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@ -558,6 +558,47 @@ int TreeView::item_count() const
return count;
}
void TreeView::auto_resize_column(int column)
{
if (!model())
return;
if (!column_header().is_section_visible(column))
return;
auto& model = *this->model();
int header_width = column_header().font().width(model.column_name(column));
if (column == m_key_column && model.is_column_sortable(column))
header_width += font().width(" \xE2\xAC\x86");
int column_width = header_width;
bool is_empty = true;
traverse_in_paint_order([&](const ModelIndex& index, const Gfx::IntRect&, const Gfx::IntRect&, int indent_level) {
auto cell_data = model.index(index.row(), column, index.parent()).data();
int cell_width = 0;
if (cell_data.is_icon()) {
cell_width = cell_data.as_icon().bitmap_for_size(16)->width();
} else if (cell_data.is_bitmap()) {
cell_width = cell_data.as_bitmap().width();
} else if (cell_data.is_valid()) {
cell_width = font().width(cell_data.to_string());
}
if (is_empty && cell_width > 0)
is_empty = false;
if (column == model.tree_column())
cell_width += horizontal_padding() * 2 + indent_level * indent_width_in_pixels() + icon_size() / 2;
column_width = max(column_width, cell_width);
return IterationDecision::Continue;
});
auto default_column_width = column_header().default_section_size(column);
if (is_empty && column_header().is_default_section_size_initialized(column))
column_header().set_section_size(column, default_column_width);
else
column_header().set_section_size(column, column_width);
}
void TreeView::update_column_sizes()
{
if (!model())

1
Userland/Libraries/LibGUI/TreeView.h
View file

@ -76,6 +76,7 @@ private:
int text_padding() const { return 2; }
int tree_column_x_offset() const;
virtual void update_column_sizes() override;
virtual void auto_resize_column(int column) override;
template<typename Callback>
void traverse_in_paint_order(Callback) const;