X-Git-Url: https://cloud.milkyroute.net/gitweb/dolphin.git/blobdiff_plain/eac436d0374d3be323c6ba36799d3cddc98301ea..76a46fd9094b17eb99e8a42cca8562fdc0b3814c:/src/kitemviews/kitemlistgroupheader.h

diff --git a/src/kitemviews/kitemlistgroupheader.h b/src/kitemviews/kitemlistgroupheader.h
index 081607eef..0e5c61f74 100644
--- a/src/kitemviews/kitemlistgroupheader.h
+++ b/src/kitemviews/kitemlistgroupheader.h
@@ -20,7 +20,8 @@
 #ifndef KITEMLISTGROUPHEADER_H
 #define KITEMLISTGROUPHEADER_H
 
-#include <libdolphin_export.h>
+#include "dolphin_export.h"
+#include "kitemviews/kitemliststyleoption.h"
 
 #include <QByteArray>
 #include <QGraphicsWidget>
@@ -28,13 +29,20 @@
 
 class KItemListView;
 
-class LIBDOLPHINPRIVATE_EXPORT KItemListGroupHeader : public QGraphicsWidget
+/**
+ * @brief Base class for group headers.
+ *
+ * Draws a default header background. Derived classes must reimplement
+ * the method paint() and draw the role within the given roleBounds() with
+ * the color roleColor().
+ */
+class DOLPHIN_EXPORT KItemListGroupHeader : public QGraphicsWidget
 {
     Q_OBJECT
 
 public:
-    KItemListGroupHeader(QGraphicsWidget* parent = 0);
-    virtual ~KItemListGroupHeader();
+    explicit KItemListGroupHeader(QGraphicsWidget* parent = nullptr);
+    ~KItemListGroupHeader() override;
 
     void setRole(const QByteArray& role);
     QByteArray role() const;
@@ -42,17 +50,80 @@ public:
     void setData(const QVariant& data);
     QVariant data() const;
 
-    virtual QSizeF sizeHint(Qt::SizeHint which = Qt::PreferredSize, const QSizeF& constraint = QSizeF()) const;
-    virtual void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0);
+    void setStyleOption(const KItemListStyleOption& option);
+    const KItemListStyleOption& styleOption() const;
+
+    /**
+     * Sets the scroll orientation that is used by the KItemListView.
+     * This allows the group header to use a modified look dependent
+     * on the orientation.
+     */
+    void setScrollOrientation(Qt::Orientation orientation);
+    Qt::Orientation scrollOrientation() const;
+
+    void setItemIndex(int index);
+    int itemIndex() const;
+
+    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr) override;
 
 protected:
+    virtual void paintRole(QPainter* painter, const QRectF& roleBounds, const QColor& color) = 0;
+    virtual void paintSeparator(QPainter* painter, const QColor& color) = 0;
+
+    /**
+     * Is called after the role has been changed and allows the derived class
+     * to react on this change.
+     */
     virtual void roleChanged(const QByteArray& current, const QByteArray& previous);
+
+    /**
+     * Is called after the role has been changed and allows the derived class
+     * to react on this change.
+     */
     virtual void dataChanged(const QVariant& current, const QVariant& previous);
 
+    /**
+     * Is called after the style option has been changed and allows the derived class
+     * to react on this change.
+     */
+    virtual void styleOptionChanged(const KItemListStyleOption& current, const KItemListStyleOption& previous);
+
+    /**
+     * Is called after the scroll orientation has been changed and allows the derived class
+     * to react on this change.
+     */
+    virtual void scrollOrientationChanged(Qt::Orientation current, Qt::Orientation previous);
+
+    /**
+     * Is called after the item index has been changed and allows the derived class to react on
+     * this change.
+     */
+    virtual void itemIndexChanged(int current, int previous);
+
+    void resizeEvent(QGraphicsSceneResizeEvent* event) override;
+
+    virtual QPalette::ColorRole normalTextColorRole() const;
+    virtual QPalette::ColorRole normalBaseColorRole() const;
+
+private:
+    void updateCache();
+
+    static QColor mixedColor(const QColor& c1, const QColor& c2, int c1Percent = 50);
+
+    QColor textColor() const;
+    QColor baseColor() const;
+
 private:
+    bool m_dirtyCache;
     QByteArray m_role;
     QVariant m_data;
+    KItemListStyleOption m_styleOption;
+    Qt::Orientation m_scrollOrientation;
+    int m_itemIndex;
 
+    QColor m_separatorColor;
+    QColor m_roleColor;
+    QRectF m_roleBounds;
 };
 #endif