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/*
* SPDX-FileCopyrightText: 2011 Peter Penz <[email protected]>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef KITEMLISTGROUPHEADER_H
#define KITEMLISTGROUPHEADER_H
#include "dolphin_export.h"
#include "kitemviews/kitemliststyleoption.h"
#include <QByteArray>
#include <QGraphicsWidget>
#include <QVariant>
class KItemListView;
/**
* @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:
explicit KItemListGroupHeader(QGraphicsWidget *parent = nullptr);
~KItemListGroupHeader() override;
void setRole(const QByteArray &role);
QByteArray role() const;
void setData(const QVariant &data);
QVariant data() const;
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 ¤t, 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 ¤t, 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 ¤t, 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();
void updateSize();
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
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