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LibGUI: Limit column view rubber band rect to widget inner rect

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Previously when selecting a column that was partially scrolled out of
view the rubber band rect would extend outside the widget inner rect.

This patch rewrites the implementation to be more readable and clamps
the rubber band rect to the widget inner rect to match the behavior of
IconView.
This commit is contained in:
networkException 2022-09-10 20:31:51 +02:00 committed by Linus Groh
parent e42a9cf957
commit e0353c405d
Notes: sideshowbarker 2024-07-17 07:16:44 +09:00 
Author: https://github.com/networkException
Commit: https://github.com/SerenityOS/serenity/commit/e0353c405d
Pull-request: https://github.com/SerenityOS/serenity/pull/15194
1 changed files with 13 additions and 5 deletions
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18
Userland/Libraries/LibGUI/ColumnsView.cpp
View File

@ -66,17 +66,25 @@ void ColumnsView::second_paint_event(PaintEvent& event)
Painter painter(*this);
painter.add_clip_rect(event.rect());
painter.add_clip_rect(widget_inner_rect());
painter.translate(frame_thickness(), frame_thickness());
painter.translate(-horizontal_scrollbar().value(), -vertical_scrollbar().value());
int column_x = 0;
// Columns start rendering relative to the widget inner rect. We also account for horizontal scroll here.
int column_x = widget_inner_rect().left() - horizontal_scrollbar().value();
for (auto const& column : m_columns) {
if (m_rubber_band_origin_column.parent_index == column.parent_index)
break;
column_x += column.width + 1;
}
auto rubber_band_rect = Gfx::IntRect::from_two_points({ column_x, m_rubber_band_origin }, { column_x + m_rubber_band_origin_column.width, m_rubber_band_current });
// After walking all columns to the current one we get its bounds relative to the widget inner rect and scroll position.
auto column_left = column_x;
auto column_right = column_x + m_rubber_band_origin_column.width;
// The rubber band rect always stays inside the widget inner rect, the vertical component is handled by mousemove
auto rubber_band_left = clamp(column_left, widget_inner_rect().left(), widget_inner_rect().right() + 1);
auto rubber_band_right = clamp(column_right, widget_inner_rect().left(), widget_inner_rect().right() + 1);
auto rubber_band_rect = Gfx::IntRect::from_two_points({ rubber_band_left, m_rubber_band_origin }, { rubber_band_right, m_rubber_band_current });
painter.fill_rect(rubber_band_rect, palette().rubber_band_fill());
painter.draw_rect(rubber_band_rect, palette().rubber_band_border());
}
@ -318,7 +326,7 @@ void ColumnsView::mousedown_event(MouseEvent& event)
void ColumnsView::mousemove_event(MouseEvent& event)
{
if (m_rubber_banding) {
m_rubber_band_current = AK::clamp(event.position().y(), 0, widget_inner_rect().height());
m_rubber_band_current = clamp(event.position().y(), widget_inner_rect().top(), widget_inner_rect().bottom() + 1);
auto parent = m_rubber_band_origin_column.parent_index;
int row_count = model()->row_count(parent);