1 files changed, 100 insertions, 0 deletions
diff --git a/Libraries/LibGUI/HeaderView.h b/Libraries/LibGUI/HeaderView.h
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+++ b/Libraries/LibGUI/HeaderView.h
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+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <LibGUI/Widget.h>
+#include <LibGfx/Orientation.h>
+
+namespace GUI {
+
+class HeaderView final : public Widget {
+    C_OBJECT(HeaderView);
+
+public:
+    virtual ~HeaderView() override;
+
+    Gfx::Orientation orientation() const { return m_orientation; }
+
+    Model* model();
+    const Model* model() const;
+
+    void set_section_size(int section, int size);
+    int section_size(int section) const;
+
+    Gfx::TextAlignment section_alignment(int section) const;
+    void set_section_alignment(int section, Gfx::TextAlignment);
+
+    bool is_section_visible(int section) const;
+    void set_section_visible(int section, bool);
+
+    int section_count() const;
+    Gfx::IntRect section_rect(int section) const;
+
+private:
+    HeaderView(AbstractTableView&, Gfx::Orientation);
+
+    virtual void paint_event(PaintEvent&) override;
+    virtual void mousedown_event(MouseEvent&) override;
+    virtual void mousemove_event(MouseEvent&) override;
+    virtual void mouseup_event(MouseEvent&) override;
+    virtual void context_menu_event(ContextMenuEvent&) override;
+    virtual void leave_event(Core::Event&) override;
+
+    int horizontal_padding() const { return 5; }
+
+    Gfx::IntRect section_resize_grabbable_rect(int) const;
+
+    Menu& ensure_context_menu();
+    RefPtr<Menu> m_context_menu;
+
+    AbstractTableView& m_table_view;
+
+    Gfx::Orientation m_orientation { Gfx::Orientation::Horizontal };
+
+    struct SectionData {
+        int size { 0 };
+        bool has_initialized_size { false };
+        bool visibility { true };
+        RefPtr<Action> visibility_action;
+        Gfx::TextAlignment alignment { Gfx::TextAlignment::CenterLeft };
+    };
+    SectionData& section_data(int section) const;
+
+    void set_hovered_section(int);
+
+    mutable Vector<SectionData> m_section_data;
+
+    bool m_in_section_resize { false };
+    Gfx::IntPoint m_section_resize_origin;
+    int m_section_resize_original_width { 0 };
+    int m_resizing_section { -1 };
+    int m_pressed_section { -1 };
+    bool m_pressed_section_is_pressed { false };
+    int m_hovered_section { -1 };
+};
+
+}