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LibGUI: Support double-click resizing column headers

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Columns can now be best-fit resized by double-clicking their
grabbable edges. When a default width is set and all data is empty,
double-clicking will restore the column to its original state.
This commit is contained in:
thankyouverycool 2021-03-17 20:11:44 -04:00 • committed by Andreas Kling
parent 663fd9abb4
commit 3cc7862487
4 changed files with 93 additions and 0 deletions
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46
Userland/Libraries/LibGUI/AbstractTableView.cpp
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@ -48,6 +48,9 @@ AbstractTableView::AbstractTableView()
m_corner_button->set_fill_with_background_color(true);
m_column_header = add<HeaderView>(*this, Gfx::Orientation::Horizontal);
m_column_header->move_to_back();
m_column_header->on_resize_doubleclick = [this](auto column) {
auto_resize_column(column);
};
m_row_header = add<HeaderView>(*this, Gfx::Orientation::Vertical);
m_row_header->move_to_back();
m_row_header->set_visible(false);
@ -67,6 +70,44 @@ void AbstractTableView::select_all()
}
}
void AbstractTableView::auto_resize_column(int column)
{
if (!model())
return;
if (!column_header().is_section_visible(column))
return;
auto& model = *this->model();
int row_count = model.row_count();
int header_width = m_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;
for (int row = 0; row < row_count; ++row) {
auto cell_data = model.index(row, column).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;
column_width = max(column_width, cell_width);
}
auto default_column_size = 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_size);
else
column_header().set_section_size(column, column_width);
}
void AbstractTableView::update_column_sizes()
{
if (!model())
@ -326,6 +367,11 @@ void AbstractTableView::header_did_change_section_visibility(Badge<HeaderView>,
update();
}
void AbstractTableView::set_default_column_width(int column, int width)
{
column_header().set_default_section_size(column, width);
}
void AbstractTableView::set_column_hidden(int column, bool hidden)
{
column_header().set_section_visible(column, !hidden);