summaryrefslogtreecommitdiffstats
path: root/src/imports/layouts/qquicklayout_p.h
blob: b31bffa290f2d6f26e198aef1164c08630b7d20c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Quick Layouts module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QQUICKLAYOUT_P_H
#define QQUICKLAYOUT_P_H

#include <QPointer>
#include <QQuickItem>
#include <private/qquickitem_p.h>
#include <QtQuick/private/qquickitemchangelistener_p.h>
#include <QtGui/private/qlayoutpolicy_p.h>

QT_BEGIN_NAMESPACE

class QQuickLayoutAttached;

#if 0 && !defined(QT_NO_DEBUG) && !defined(QT_NO_DEBUG_OUTPUT)
# define quickLayoutDebug QMessageLogger(__FILE__, __LINE__, Q_FUNC_INFO).debug
#else
# define quickLayoutDebug QT_NO_QDEBUG_MACRO
#endif

class QQuickLayoutPrivate;
class QQuickLayout : public QQuickItem, public QQuickItemChangeListener

{
    Q_OBJECT
public:
    enum SizeHint {
        MinimumSize = 0,
        PreferredSize,
        MaximumSize,
        NSizes
    };

    explicit QQuickLayout(QQuickLayoutPrivate &dd, QQuickItem *parent = 0);
    ~QQuickLayout();

    static QQuickLayoutAttached *qmlAttachedProperties(QObject *object);


    void componentComplete() override;
    virtual QSizeF sizeHint(Qt::SizeHint whichSizeHint) const = 0;
    virtual void setAlignment(QQuickItem *item, Qt::Alignment align) = 0;
    virtual void invalidate(QQuickItem * childItem = 0);
    virtual void updateLayoutItems() = 0;

    // iterator
    virtual QQuickItem *itemAt(int index) const = 0;
    virtual int itemCount() const = 0;

    virtual void rearrange(const QSizeF &);
    bool arrangementIsDirty() const { return m_dirty; }

    static void effectiveSizeHints_helper(QQuickItem *item, QSizeF *cachedSizeHints, QQuickLayoutAttached **info, bool useFallbackToWidthOrHeight);
    static QLayoutPolicy::Policy effectiveSizePolicy_helper(QQuickItem *item, Qt::Orientation orientation, QQuickLayoutAttached *info);
    bool shouldIgnoreItem(QQuickItem *child, QQuickLayoutAttached *&info, QSizeF *sizeHints) const;
    void checkAnchors(QQuickItem *item) const;

    void itemChange(ItemChange change, const ItemChangeData &value) override;
    void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry)  override;
    bool isReady() const;
    void deactivateRecur();


    /* QQuickItemChangeListener */
    void itemSiblingOrderChanged(QQuickItem *item) override;
    void itemImplicitWidthChanged(QQuickItem *item) override;
    void itemImplicitHeightChanged(QQuickItem *item) override;
    void itemDestroyed(QQuickItem *item) override;
    void itemVisibilityChanged(QQuickItem *item) override;

protected:
    void updatePolish() override;

    enum Orientation {
        Vertical = 0,
        Horizontal,
        NOrientations
    };

protected slots:
    void invalidateSenderItem();

private:
    bool m_dirty;

    Q_DECLARE_PRIVATE(QQuickLayout)

    friend class QQuickLayoutAttached;
};


class QQuickLayoutPrivate : public QQuickItemPrivate
{
    Q_DECLARE_PUBLIC(QQuickLayout)
public:
    QQuickLayoutPrivate() : m_isReady(false), m_disableRearrange(true) {}

protected:
    unsigned m_isReady : 1;
    unsigned m_disableRearrange : 1;
    unsigned m_hasItemChangeListeners : 1;      // if false, we don't need to remove its item change listeners...
    mutable QSet<QQuickItem *> m_ignoredItems;
};


class QQuickLayoutAttached : public QObject
{
    Q_OBJECT
    Q_PROPERTY(qreal minimumWidth READ minimumWidth WRITE setMinimumWidth NOTIFY minimumWidthChanged)
    Q_PROPERTY(qreal minimumHeight READ minimumHeight WRITE setMinimumHeight NOTIFY minimumHeightChanged)
    Q_PROPERTY(qreal preferredWidth READ preferredWidth WRITE setPreferredWidth NOTIFY preferredWidthChanged)
    Q_PROPERTY(qreal preferredHeight READ preferredHeight WRITE setPreferredHeight NOTIFY preferredHeightChanged)
    Q_PROPERTY(qreal maximumWidth READ maximumWidth WRITE setMaximumWidth NOTIFY maximumWidthChanged)
    Q_PROPERTY(qreal maximumHeight READ maximumHeight WRITE setMaximumHeight NOTIFY maximumHeightChanged)
    Q_PROPERTY(bool fillHeight READ fillHeight WRITE setFillHeight NOTIFY fillHeightChanged)
    Q_PROPERTY(bool fillWidth READ fillWidth WRITE setFillWidth NOTIFY fillWidthChanged)
    Q_PROPERTY(int row READ row WRITE setRow NOTIFY rowChanged)
    Q_PROPERTY(int column READ column WRITE setColumn NOTIFY columnChanged)
    Q_PROPERTY(int rowSpan READ rowSpan WRITE setRowSpan NOTIFY rowSpanChanged)
    Q_PROPERTY(int columnSpan READ columnSpan WRITE setColumnSpan NOTIFY columnSpanChanged)
    Q_PROPERTY(Qt::Alignment alignment READ alignment WRITE setAlignment NOTIFY alignmentChanged)

    Q_PROPERTY(qreal margins READ margins WRITE setMargins NOTIFY marginsChanged)
    Q_PROPERTY(qreal leftMargin READ leftMargin WRITE setLeftMargin RESET resetLeftMargin NOTIFY leftMarginChanged)
    Q_PROPERTY(qreal topMargin READ topMargin WRITE setTopMargin RESET resetTopMargin NOTIFY topMarginChanged)
    Q_PROPERTY(qreal rightMargin READ rightMargin WRITE setRightMargin RESET resetRightMargin NOTIFY rightMarginChanged)
    Q_PROPERTY(qreal bottomMargin READ bottomMargin WRITE setBottomMargin RESET resetBottomMargin NOTIFY bottomMarginChanged)

public:
    QQuickLayoutAttached(QObject *object);

    qreal minimumWidth() const { return !m_isMinimumWidthSet ? sizeHint(Qt::MinimumSize, Qt::Horizontal) : m_minimumWidth; }
    void setMinimumWidth(qreal width);

    qreal minimumHeight() const { return !m_isMinimumHeightSet ? sizeHint(Qt::MinimumSize, Qt::Vertical) : m_minimumHeight; }
    void setMinimumHeight(qreal height);

    qreal preferredWidth() const { return m_preferredWidth; }
    void setPreferredWidth(qreal width);

    qreal preferredHeight() const { return m_preferredHeight; }
    void setPreferredHeight(qreal width);

    qreal maximumWidth() const { return !m_isMaximumWidthSet ? sizeHint(Qt::MaximumSize, Qt::Horizontal) : m_maximumWidth; }
    void setMaximumWidth(qreal width);

    qreal maximumHeight() const { return !m_isMaximumHeightSet ? sizeHint(Qt::MaximumSize, Qt::Vertical) : m_maximumHeight; }
    void setMaximumHeight(qreal height);

    void setMinimumImplicitSize(const QSizeF &sz);
    void setMaximumImplicitSize(const QSizeF &sz);

    bool fillWidth() const { return m_fillWidth; }
    void setFillWidth(bool fill);
    bool isFillWidthSet() const { return m_isFillWidthSet; }

    bool fillHeight() const { return m_fillHeight; }
    void setFillHeight(bool fill);
    bool isFillHeightSet() const { return m_isFillHeightSet; }

    int row() const { return qMax(m_row, 0); }
    void setRow(int row);
    bool isRowSet() const { return m_row >= 0; }
    int column() const { return qMax(m_column, 0); }
    void setColumn(int column);
    bool isColumnSet() const { return m_column >= 0; }

    int rowSpan() const { return m_rowSpan; }
    void setRowSpan(int span);
    int columnSpan() const { return m_columnSpan; }
    void setColumnSpan(int span);

    Qt::Alignment alignment() const { return m_alignment; }
    void setAlignment(Qt::Alignment align);

    qreal margins() const { return m_defaultMargins; }
    void setMargins(qreal m);

    qreal leftMargin() const { return m_isLeftMarginSet ? m_margins.left() : m_defaultMargins; }
    void setLeftMargin(qreal m);
    void resetLeftMargin();

    qreal topMargin() const { return m_isTopMarginSet ? m_margins.top() : m_defaultMargins; }
    void setTopMargin(qreal m);
    void resetTopMargin();

    qreal rightMargin() const { return m_isRightMarginSet ? m_margins.right() : m_defaultMargins; }
    void setRightMargin(qreal m);
    void resetRightMargin();

    qreal bottomMargin() const { return m_isBottomMarginSet ? m_margins.bottom() : m_defaultMargins; }
    void setBottomMargin(qreal m);
    void resetBottomMargin();

    QMarginsF qMargins() const {
        return QMarginsF(leftMargin(), topMargin(), rightMargin(), bottomMargin());
    }

    bool setChangesNotificationEnabled(bool enabled)
    {
        const bool old = m_changesNotificationEnabled;
        m_changesNotificationEnabled = enabled;
        return old;
    }

    qreal sizeHint(Qt::SizeHint which, Qt::Orientation orientation) const;

    bool isExtentExplicitlySet(Qt::Orientation o, Qt::SizeHint whichSize) const
    {
        switch (whichSize) {
        case Qt::MinimumSize:
            return o == Qt::Horizontal ? m_isMinimumWidthSet : m_isMinimumHeightSet;
        case Qt::MaximumSize:
            return o == Qt::Horizontal ? m_isMaximumWidthSet : m_isMaximumHeightSet;
        case Qt::PreferredSize:
            return true;            // Layout.preferredWidth is always explicitly set
        case Qt::MinimumDescent:    // Not supported
        case Qt::NSizeHints:
            return false;
        }
        return false;
    }

signals:
    void minimumWidthChanged();
    void minimumHeightChanged();
    void preferredWidthChanged();
    void preferredHeightChanged();
    void maximumWidthChanged();
    void maximumHeightChanged();
    void fillWidthChanged();
    void fillHeightChanged();
    void leftMarginChanged();
    void topMarginChanged();
    void rightMarginChanged();
    void bottomMarginChanged();
    void marginsChanged();
    void rowChanged();
    void columnChanged();
    void rowSpanChanged();
    void columnSpanChanged();
    void alignmentChanged();

private:
    void invalidateItem();
    void repopulateLayout();
    QQuickLayout *parentLayout() const;
    QQuickItem *item() const;
private:
    qreal m_minimumWidth;
    qreal m_minimumHeight;
    qreal m_preferredWidth;
    qreal m_preferredHeight;
    qreal m_maximumWidth;
    qreal m_maximumHeight;

    qreal m_defaultMargins;
    QMarginsF m_margins;

    qreal m_fallbackWidth;
    qreal m_fallbackHeight;

    // GridLayout specific properties
    int m_row;
    int m_column;
    int m_rowSpan;
    int m_columnSpan;

    unsigned m_fillWidth : 1;
    unsigned m_fillHeight : 1;
    unsigned m_isFillWidthSet : 1;
    unsigned m_isFillHeightSet : 1;
    unsigned m_isMinimumWidthSet : 1;
    unsigned m_isMinimumHeightSet : 1;
    // preferredWidth and preferredHeight are always explicit, since
    // their implicit equivalent is implicitWidth and implicitHeight
    unsigned m_isMaximumWidthSet : 1;
    unsigned m_isMaximumHeightSet : 1;
    unsigned m_changesNotificationEnabled : 1;
    unsigned m_isLeftMarginSet : 1;
    unsigned m_isTopMarginSet : 1;
    unsigned m_isRightMarginSet : 1;
    unsigned m_isBottomMarginSet : 1;
    Qt::Alignment m_alignment;
    friend class QQuickLayout;
};

inline QQuickLayoutAttached *attachedLayoutObject(QQuickItem *item, bool create = true)
{
    return static_cast<QQuickLayoutAttached *>(qmlAttachedPropertiesObject<QQuickLayout>(item, create));
}

QT_END_NAMESPACE

QML_DECLARE_TYPE(QQuickLayout)
QML_DECLARE_TYPEINFO(QQuickLayout, QML_HAS_ATTACHED_PROPERTIES)

#endif // QQUICKLAYOUT_P_H