path: root/src/quick/items/qquickpositioners_p.h

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#ifndef QQUICKPOSITIONERS_P_H
#define QQUICKPOSITIONERS_P_H

#include "qquickimplicitsizeitem_p.h"

#include <QtQuick/private/qdeclarativestate_p.h>
#include <private/qpodvector_p.h>

#include <QtCore/qobject.h>
#include <QtCore/qstring.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

class QQuickBasePositionerPrivate;

class QQuickPositionerAttached : public QObject
{
    Q_OBJECT

public:
    QQuickPositionerAttached(QObject *parent);

    Q_PROPERTY(int index READ index NOTIFY indexChanged)
    Q_PROPERTY(bool isFirstItem READ isFirstItem NOTIFY isFirstItemChanged)
    Q_PROPERTY(bool isLastItem READ isLastItem NOTIFY isLastItemChanged)

    int index() const { return m_index; }
    void setIndex(int index);

    bool isFirstItem() const { return m_isFirstItem; }
    void setIsFirstItem(bool isFirstItem);

    bool isLastItem() const { return m_isLastItem; }
    void setIsLastItem(bool isLastItem);

Q_SIGNALS:
    void indexChanged();
    void isFirstItemChanged();
    void isLastItemChanged();

private:
    int m_index;
    bool m_isFirstItem;
    bool m_isLastItem;
};

class Q_QUICK_PRIVATE_EXPORT QQuickBasePositioner : public QQuickImplicitSizeItem
{
    Q_OBJECT

    Q_PROPERTY(qreal spacing READ spacing WRITE setSpacing NOTIFY spacingChanged)
    Q_PROPERTY(QDeclarativeTransition *move READ move WRITE setMove NOTIFY moveChanged)
    Q_PROPERTY(QDeclarativeTransition *add READ add WRITE setAdd NOTIFY addChanged)
public:
    enum PositionerType { None = 0x0, Horizontal = 0x1, Vertical = 0x2, Both = 0x3 };
    QQuickBasePositioner(PositionerType, QQuickItem *parent);
    ~QQuickBasePositioner();

    qreal spacing() const;
    void setSpacing(qreal);

    QDeclarativeTransition *move() const;
    void setMove(QDeclarativeTransition *);

    QDeclarativeTransition *add() const;
    void setAdd(QDeclarativeTransition *);

    static QQuickPositionerAttached *qmlAttachedProperties(QObject *obj);

    void updateAttachedProperties(QQuickPositionerAttached *specificProperty = 0, QQuickItem *specificPropertyOwner = 0) const;

protected:
    QQuickBasePositioner(QQuickBasePositionerPrivate &dd, PositionerType at, QQuickItem *parent);
    virtual void componentComplete();
    virtual void itemChange(ItemChange, const ItemChangeData &);
    void finishApplyTransitions();

    virtual void updatePolish();

Q_SIGNALS:
    void spacingChanged();
    void moveChanged();
    void addChanged();

protected Q_SLOTS:
    void prePositioning();

protected:
    virtual void doPositioning(QSizeF *contentSize)=0;
    virtual void reportConflictingAnchors()=0;
    class PositionedItem {
    public :
        PositionedItem(QQuickItem *i) : item(i), isNew(false), isVisible(true) {}
        bool operator==(const PositionedItem &other) const { return other.item == item; }
        QQuickItem *item;
        bool isNew;
        bool isVisible;
    };

    QPODVector<PositionedItem,8> positionedItems;
    QPODVector<PositionedItem,8> unpositionedItems;//Still 'in' the positioner, just not positioned
    void positionX(qreal,const PositionedItem &target);
    void positionY(qreal,const PositionedItem &target);

private:
    Q_DISABLE_COPY(QQuickBasePositioner)
    Q_DECLARE_PRIVATE(QQuickBasePositioner)
};

class Q_AUTOTEST_EXPORT QQuickColumn : public QQuickBasePositioner
{
    Q_OBJECT
public:
    QQuickColumn(QQuickItem *parent=0);

protected:
    virtual void doPositioning(QSizeF *contentSize);
    virtual void reportConflictingAnchors();
private:
    Q_DISABLE_COPY(QQuickColumn)
};

class Q_AUTOTEST_EXPORT QQuickRow: public QQuickBasePositioner
{
    Q_OBJECT
    Q_PROPERTY(Qt::LayoutDirection layoutDirection READ layoutDirection WRITE setLayoutDirection NOTIFY layoutDirectionChanged)
    Q_PROPERTY(Qt::LayoutDirection effectiveLayoutDirection READ effectiveLayoutDirection NOTIFY effectiveLayoutDirectionChanged)
public:
    QQuickRow(QQuickItem *parent=0);

    Qt::LayoutDirection layoutDirection() const;
    void setLayoutDirection (Qt::LayoutDirection);
    Qt::LayoutDirection effectiveLayoutDirection() const;

Q_SIGNALS:
    void layoutDirectionChanged();
    void effectiveLayoutDirectionChanged();

protected:
    virtual void doPositioning(QSizeF *contentSize);
    virtual void reportConflictingAnchors();
private:
    Q_DISABLE_COPY(QQuickRow)
};

class Q_AUTOTEST_EXPORT QQuickGrid : public QQuickBasePositioner
{
    Q_OBJECT
    Q_PROPERTY(int rows READ rows WRITE setRows NOTIFY rowsChanged)
    Q_PROPERTY(int columns READ columns WRITE setColumns NOTIFY columnsChanged)
    Q_PROPERTY(qreal rowSpacing READ rowSpacing WRITE setRowSpacing NOTIFY rowSpacingChanged RESET resetRowSpacing)
    Q_PROPERTY(qreal columnSpacing READ columnSpacing WRITE setColumnSpacing NOTIFY columnSpacingChanged RESET resetColumnSpacing)
    Q_PROPERTY(Flow flow READ flow WRITE setFlow NOTIFY flowChanged)
    Q_PROPERTY(Qt::LayoutDirection layoutDirection READ layoutDirection WRITE setLayoutDirection NOTIFY layoutDirectionChanged)
    Q_PROPERTY(Qt::LayoutDirection effectiveLayoutDirection READ effectiveLayoutDirection NOTIFY effectiveLayoutDirectionChanged)

public:
    QQuickGrid(QQuickItem *parent=0);

    int rows() const { return m_rows; }
    void setRows(const int rows);

    int columns() const { return m_columns; }
    void setColumns(const int columns);

    qreal rowSpacing() const { return m_rowSpacing; }
    void setRowSpacing(qreal);
    void resetRowSpacing() { m_useRowSpacing = false; }

    qreal columnSpacing() const { return m_columnSpacing; }
    void setColumnSpacing(qreal);
    void resetColumnSpacing() { m_useColumnSpacing = false; }

    Q_ENUMS(Flow)
    enum Flow { LeftToRight, TopToBottom };
    Flow flow() const;
    void setFlow(Flow);

    Qt::LayoutDirection layoutDirection() const;
    void setLayoutDirection (Qt::LayoutDirection);
    Qt::LayoutDirection effectiveLayoutDirection() const;

Q_SIGNALS:
    void rowsChanged();
    void columnsChanged();
    void flowChanged();
    void layoutDirectionChanged();
    void effectiveLayoutDirectionChanged();
    void rowSpacingChanged();
    void columnSpacingChanged();

protected:
    virtual void doPositioning(QSizeF *contentSize);
    virtual void reportConflictingAnchors();

private:
    int m_rows;
    int m_columns;
    qreal m_rowSpacing;
    qreal m_columnSpacing;
    bool m_useRowSpacing;
    bool m_useColumnSpacing;
    Flow m_flow;
    Q_DISABLE_COPY(QQuickGrid)
};

class QQuickFlowPrivate;
class Q_AUTOTEST_EXPORT QQuickFlow: public QQuickBasePositioner
{
    Q_OBJECT
    Q_PROPERTY(Flow flow READ flow WRITE setFlow NOTIFY flowChanged)
    Q_PROPERTY(Qt::LayoutDirection layoutDirection READ layoutDirection WRITE setLayoutDirection NOTIFY layoutDirectionChanged)
    Q_PROPERTY(Qt::LayoutDirection effectiveLayoutDirection READ effectiveLayoutDirection NOTIFY effectiveLayoutDirectionChanged)
public:
    QQuickFlow(QQuickItem *parent=0);

    Q_ENUMS(Flow)
    enum Flow { LeftToRight, TopToBottom };
    Flow flow() const;
    void setFlow(Flow);

    Qt::LayoutDirection layoutDirection() const;
    void setLayoutDirection (Qt::LayoutDirection);
    Qt::LayoutDirection effectiveLayoutDirection() const;

Q_SIGNALS:
    void flowChanged();
    void layoutDirectionChanged();
    void effectiveLayoutDirectionChanged();

protected:
    virtual void doPositioning(QSizeF *contentSize);
    virtual void reportConflictingAnchors();
protected:
    QQuickFlow(QQuickFlowPrivate &dd, QQuickItem *parent);
private:
    Q_DISABLE_COPY(QQuickFlow)
    Q_DECLARE_PRIVATE(QQuickFlow)
};


QT_END_NAMESPACE

QML_DECLARE_TYPE(QQuickColumn)
QML_DECLARE_TYPE(QQuickRow)
QML_DECLARE_TYPE(QQuickGrid)
QML_DECLARE_TYPE(QQuickFlow)

QML_DECLARE_TYPE(QQuickBasePositioner)
QML_DECLARE_TYPEINFO(QQuickBasePositioner, QML_HAS_ATTACHED_PROPERTIES)

QT_END_HEADER

#endif // QQUICKPOSITIONERS_P_H