qformlayout.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QFORMLAYOUT_H
#define QFORMLAYOUT_H
 
#include <QtWidgets/qtwidgetsglobal.h>
#include <QtWidgets/QLayout>
 
QT_REQUIRE_CONFIG(formlayout);
 
QT_BEGIN_NAMESPACE
 
 
class QFormLayoutPrivate;
 
class Q_WIDGETS_EXPORT QFormLayout : public QLayout
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QFormLayout)
    Q_PROPERTY(FieldGrowthPolicy fieldGrowthPolicy READ fieldGrowthPolicy WRITE setFieldGrowthPolicy
               RESET resetFieldGrowthPolicy)
    Q_PROPERTY(RowWrapPolicy rowWrapPolicy READ rowWrapPolicy WRITE setRowWrapPolicy
               RESET resetRowWrapPolicy)
    Q_PROPERTY(Qt::Alignment labelAlignment READ labelAlignment WRITE setLabelAlignment
               RESET resetLabelAlignment)
    Q_PROPERTY(Qt::Alignment formAlignment READ formAlignment WRITE setFormAlignment
               RESET resetFormAlignment)
    Q_PROPERTY(int horizontalSpacing READ horizontalSpacing WRITE setHorizontalSpacing)
    Q_PROPERTY(int verticalSpacing READ verticalSpacing WRITE setVerticalSpacing)
 
public:
    enum FieldGrowthPolicy {
        FieldsStayAtSizeHint,
        ExpandingFieldsGrow,
        AllNonFixedFieldsGrow
    };
    Q_ENUM(FieldGrowthPolicy)
 
    enum RowWrapPolicy {
        DontWrapRows,
        WrapLongRows,
        WrapAllRows
    };
    Q_ENUM(RowWrapPolicy)
 
    enum ItemRole {
        LabelRole = 0,
        FieldRole = 1,
        SpanningRole = 2
    };
    Q_ENUM(ItemRole)
 
    struct TakeRowResult {
        QLayoutItem *labelItem;
        QLayoutItem *fieldItem;
    };
 
    explicit QFormLayout(QWidget *parent = nullptr);
    ~QFormLayout();
 
    void setFieldGrowthPolicy(FieldGrowthPolicy policy);
    FieldGrowthPolicy fieldGrowthPolicy() const;
    void setRowWrapPolicy(RowWrapPolicy policy);
    RowWrapPolicy rowWrapPolicy() const;
    void setLabelAlignment(Qt::Alignment alignment);
    Qt::Alignment labelAlignment() const;
    void setFormAlignment(Qt::Alignment alignment);
    Qt::Alignment formAlignment() const;
 
    void setHorizontalSpacing(int spacing);
    int horizontalSpacing() const;
    void setVerticalSpacing(int spacing);
    int verticalSpacing() const;
 
    int spacing() const override;
    void setSpacing(int) override;
 
    void addRow(QWidget *label, QWidget *field);
    void addRow(QWidget *label, QLayout *field);
    void addRow(const QString &labelText, QWidget *field);
    void addRow(const QString &labelText, QLayout *field);
    void addRow(QWidget *widget);
    void addRow(QLayout *layout);
 
    void insertRow(int row, QWidget *label, QWidget *field);
    void insertRow(int row, QWidget *label, QLayout *field);
    void insertRow(int row, const QString &labelText, QWidget *field);
    void insertRow(int row, const QString &labelText, QLayout *field);
    void insertRow(int row, QWidget *widget);
    void insertRow(int row, QLayout *layout);
 
    void removeRow(int row);
    void removeRow(QWidget *widget);
    void removeRow(QLayout *layout);
 
    TakeRowResult takeRow(int row);
    TakeRowResult takeRow(QWidget *widget);
    TakeRowResult takeRow(QLayout *layout);
 
    void setItem(int row, ItemRole role, QLayoutItem *item);
    void setWidget(int row, ItemRole role, QWidget *widget);
    void setLayout(int row, ItemRole role, QLayout *layout);
 
    void setRowVisible(int row, bool on);
    void setRowVisible(QWidget *widget, bool on);
    void setRowVisible(QLayout *layout, bool on);
 
    bool isRowVisible(int row) const;
    bool isRowVisible(QWidget *widget) const;
    bool isRowVisible(QLayout *layout) const;
 
    QLayoutItem *itemAt(int row, ItemRole role) const;
    void getItemPosition(int index, int *rowPtr, ItemRole *rolePtr) const;
    void getWidgetPosition(QWidget *widget, int *rowPtr, ItemRole *rolePtr) const;
    void getLayoutPosition(QLayout *layout, int *rowPtr, ItemRole *rolePtr) const;
    QWidget *labelForField(QWidget *field) const;
    QWidget *labelForField(QLayout *field) const;
 
    // reimplemented from QLayout
    void addItem(QLayoutItem *item) override;
    QLayoutItem *itemAt(int index) const override;
    QLayoutItem *takeAt(int index) override;
 
    void setGeometry(const QRect &rect) override;
    QSize minimumSize() const override;
    QSize sizeHint() const override;
    void invalidate() override;
 
    bool hasHeightForWidth() const override;
    int heightForWidth(int width) const override;
    Qt::Orientations expandingDirections() const override;
    int count() const override;
 
    int rowCount() const;
 
#if 0
    void dump() const;
#endif
 
private:
    void resetFieldGrowthPolicy();
    void resetRowWrapPolicy();
    void resetLabelAlignment();
    void resetFormAlignment();
};
 
Q_DECLARE_TYPEINFO(QFormLayout::TakeRowResult, Q_PRIMITIVE_TYPE);
 
QT_END_NAMESPACE
 
#endif