edb61d8bfd
This is a shiny new widget that can display a tree using Miller columns ^:) In many cases, the columns view can be used as an alternative to tree view, but it has its own set of limitations: * It can only display one model column (so it cannot replace a table) * It takes up a lot of horizontal space, so it's only suitable if the item text is fairly short * It can only display one subtree at a time But as long as a usecase doesn't suffer from these limitations, a columns view can be *much* more intuitive than a tree view.
40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
#pragma once
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#include <AK/Vector.h>
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#include <LibGUI/GAbstractView.h>
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class GColumnsView : public GAbstractView {
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C_OBJECT(GColumnsView)
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public:
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int model_column() const { return m_model_column; }
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void set_model_column(int column) { m_model_column = column; }
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private:
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GColumnsView(GWidget* parent = nullptr);
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virtual ~GColumnsView();
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GModelIndex index_at_event_position(const Point&) const;
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void push_column(GModelIndex& parent_index);
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void update_column_sizes();
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int item_height() const { return 16; }
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int icon_size() const { return 16; }
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int icon_spacing() const { return 2; }
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int text_padding() const { return 2; }
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virtual void did_update_model() override;
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virtual void paint_event(GPaintEvent&) override;
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virtual void mousedown_event(GMouseEvent& event) override;
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virtual void doubleclick_event(GMouseEvent& event) override;
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virtual void context_menu_event(GContextMenuEvent& event) override;
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virtual void keydown_event(GKeyEvent& event) override;
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struct Column {
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GModelIndex parent_index;
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int width;
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// TODO: per-column vertical scroll?
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};
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Vector<Column> m_columns;
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int m_model_column;
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};
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