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LibGUI: clicking and dragging one item will drag other items in selection

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Previously if more than one item was selected clicking on one of
them and dragging would de-select everything that is not the one that
was clicked on. Now, if more than one items are selected and there
is a mousedown it goes into a "mightdrag" state.
The user can then perform a drag, if they don't everything that is not
the item being clicked gets unselected in the mouseup event, mimicking
the previous behavior.
This commit is contained in:
Dov Alperin 2020-01-06 17:58:08 -05:00 committed by Andreas Kling
parent e0c959ea7f
commit 518f469970
Notes: sideshowbarker 2024-07-19 10:15:59 +09:00 
Author: https://github.com/DAlperin
Commit: https://github.com/SerenityOS/serenity/commit/518f4699708
Pull-request: https://github.com/SerenityOS/serenity/pull/1032
Reviewed-by: https://github.com/awesomekling
2 changed files with 10 additions and 0 deletions
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8
Libraries/LibGUI/GItemView.cpp
View File

@ -130,6 +130,8 @@ void GItemView::mousedown_event(GMouseEvent& event)
auto index = model()->index(item_index, m_model_column);
if (event.modifiers() & Mod_Ctrl)
selection().toggle(index);
else if (selection().size() > 1)
m_might_drag = true;
else
selection().set(index);
}
@ -146,6 +148,12 @@ void GItemView::mouseup_event(GMouseEvent& event)
update();
return;
}
int item_index = item_at_event_position(event.position());
auto index = model()->index(item_index, m_model_column);
if((selection().size() > 1) & m_might_drag) {
selection().set(index);
m_might_drag = false;
}
GAbstractView::mouseup_event(event);
}

2
Libraries/LibGUI/GItemView.h
View File

@ -48,6 +48,8 @@ private:
int m_visual_column_count { 0 };
int m_visual_row_count { 0 };
bool m_might_drag { false };
Point m_left_mousedown_position;
Size m_effective_item_size { 80, 80 };