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LibGUI: Implement shift-select

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shift-selecting simply toggles all indices in the range between the
cursor and the index that is being 'selected'.
This commit is contained in:
AnotherTest 2020-11-02 19:32:09 +03:30 • committed by Andreas Kling
parent 6913e2ab99
commit 6e9c6acc87
1 changed files with 19 additions and 0 deletions
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19
Libraries/LibGUI/AbstractView.cpp
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@ -228,6 +228,8 @@ void AbstractView::mousedown_event(MouseEvent& event)
clear_selection(); clear_selection();
} else if (event.modifiers() & Mod_Ctrl) { } else if (event.modifiers() & Mod_Ctrl) {
set_cursor(index, SelectionUpdate::Ctrl); set_cursor(index, SelectionUpdate::Ctrl);
} else if (event.modifiers() & Mod_Shift) {
set_cursor(index, SelectionUpdate::Shift);
} else if (event.button() == MouseButton::Left && m_selection.contains(index) && !m_model->drag_data_type().is_null()) { } else if (event.button() == MouseButton::Left && m_selection.contains(index) && !m_model->drag_data_type().is_null()) {
// We might be starting a drag, so don't throw away other selected items yet. // We might be starting a drag, so don't throw away other selected items yet.
m_might_drag = true; m_might_drag = true;
@ -452,6 +454,23 @@ void AbstractView::set_cursor(ModelIndex index, SelectionUpdate selection_update
else if (selection_update == SelectionUpdate::ClearIfNotSelected) { else if (selection_update == SelectionUpdate::ClearIfNotSelected) {
if (!m_selection.contains(index)) if (!m_selection.contains(index))
clear_selection(); clear_selection();
} else if (selection_update == SelectionUpdate::Shift) {
// Toggle all from cursor to new index.
auto min_row = min(cursor_index().row(), index.row());
auto max_row = max(cursor_index().row(), index.row());
auto min_column = min(cursor_index().column(), index.column());
auto max_column = max(cursor_index().column(), index.column());
for (auto row = min_row; row <= max_row; ++row) {
for (auto column = min_column; column <= max_column; ++column) {
auto new_index = model()->index(row, column);
if (new_index.is_valid())
toggle_selection(new_index);
}
}
// Finally toggle the cursor index again to make it go back to its current state.
toggle_selection(cursor_index());
} }
// FIXME: Support the other SelectionUpdate types // FIXME: Support the other SelectionUpdate types