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Code Issues Activity Actions

LibGUI: Allow scrolling through a ComboBox with the mouse wheel

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This commit is contained in:
Andreas Kling 2020-05-12 15:10:31 +02:00
parent 18ff75e67b
commit e064999e0d
4 changed files with 51 additions and 26 deletions
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45
Libraries/LibGUI/ListView.cpp
View file

@ -182,6 +182,25 @@ int ListView::item_count() const
return model()->row_count();
}
void ListView::move_selection(int steps)
{
if (!model())
return;
auto& model = *this->model();
ModelIndex new_index;
if (!selection().is_empty()) {
auto old_index = selection().first();
new_index = model.index(old_index.row() + steps, old_index.column());
} else {
new_index = model.index(0, 0);
}
if (model.is_valid(new_index)) {
selection().set(new_index);
scroll_into_view(new_index, Orientation::Vertical);
update();
}
}
void ListView::keydown_event(KeyEvent& event)
{
if (!model())
@ -192,33 +211,11 @@ void ListView::keydown_event(KeyEvent& event)
return;
}
if (event.key() == KeyCode::Key_Up) {
ModelIndex new_index;
if (!selection().is_empty()) {
auto old_index = selection().first();
new_index = model.index(old_index.row() - 1, old_index.column());
} else {
new_index = model.index(0, 0);
}
if (model.is_valid(new_index)) {
selection().set(new_index);
scroll_into_view(new_index, Orientation::Vertical);
update();
}
move_selection(-1);
return;
}
if (event.key() == KeyCode::Key_Down) {
ModelIndex new_index;
if (!selection().is_empty()) {
auto old_index = selection().first();
new_index = model.index(old_index.row() + 1, old_index.column());
} else {
new_index = model.index(0, 0);
}
if (model.is_valid(new_index)) {
selection().set(new_index);
scroll_into_view(new_index, Orientation::Vertical);
update();
}
move_selection(1);
return;
}
if (event.key() == KeyCode::Key_PageUp) {