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39 
40 #ifndef QCOLUMNVIEW_P_H
41 #define QCOLUMNVIEW_P_H
42 
43 //
44 //  W A R N I N G
45 //  -------------
46 //
47 // This file is not part of the Qt API.  It exists for the convenience
48 // of other Qt classes.  This header file may change from version to
49 // version without notice, or even be removed.
50 //
51 // We mean it.
52 //
53 
54 #include <QtWidgets/private/qtwidgetsglobal_p.h>
55 #include "qcolumnview.h"
56 
57 #include <private/qabstractitemview_p.h>
58 
59 #include <QtCore/qabstractitemmodel.h>
60 #if QT_CONFIG(animation)
61 #include <QtCore/qpropertyanimation.h>
62 #endif
63 #include <QtWidgets/qabstractitemdelegate.h>
64 #include <QtWidgets/qabstractitemview.h>
65 #include <QtWidgets/qitemdelegate.h>
66 #include <qlistview.h>
67 #include <qevent.h>
68 #include <qscrollbar.h>
69 
70 QT_REQUIRE_CONFIG(columnview);
71 
72 QT_BEGIN_NAMESPACE
73 
74 class QColumnViewPreviewColumn : public QAbstractItemView {
75 
76 public:
QColumnViewPreviewColumn(QWidget * parent)77     explicit QColumnViewPreviewColumn(QWidget *parent) : QAbstractItemView(parent), previewWidget(nullptr) {
78     }
79 
setPreviewWidget(QWidget * widget)80     void setPreviewWidget(QWidget *widget) {
81         previewWidget = widget;
82         setMinimumWidth(previewWidget->minimumWidth());
83     }
84 
resizeEvent(QResizeEvent * event)85     void resizeEvent(QResizeEvent * event) override{
86         if (!previewWidget)
87             return;
88         previewWidget->resize(
89                 qMax(previewWidget->minimumWidth(), event->size().width()),
90                 previewWidget->height());
91         QSize p = viewport()->size();
92         QSize v = previewWidget->size();
93         horizontalScrollBar()->setRange(0, v.width() - p.width());
94         horizontalScrollBar()->setPageStep(p.width());
95         verticalScrollBar()->setRange(0, v.height() - p.height());
96         verticalScrollBar()->setPageStep(p.height());
97 
98         QAbstractScrollArea::resizeEvent(event);
99     }
100 
scrollContentsBy(int dx,int dy)101     void scrollContentsBy(int dx, int dy) override
102     {
103         if (!previewWidget)
104             return;
105         scrollDirtyRegion(dx, dy);
106         viewport()->scroll(dx, dy);
107 
108         QAbstractItemView::scrollContentsBy(dx, dy);
109     }
110 
visualRect(const QModelIndex &)111     QRect visualRect(const QModelIndex &) const override
112     {
113         return QRect();
114     }
scrollTo(const QModelIndex &,ScrollHint)115     void scrollTo(const QModelIndex &, ScrollHint) override
116     {
117     }
indexAt(const QPoint &)118     QModelIndex indexAt(const QPoint &) const override
119     {
120         return QModelIndex();
121     }
moveCursor(CursorAction,Qt::KeyboardModifiers)122     QModelIndex moveCursor(CursorAction, Qt::KeyboardModifiers) override
123     {
124         return QModelIndex();
125     }
horizontalOffset()126     int horizontalOffset () const override {
127         return 0;
128     }
verticalOffset()129     int verticalOffset () const override {
130         return 0;
131     }
visualRegionForSelection(const QItemSelection &)132     QRegion visualRegionForSelection(const QItemSelection &) const override
133     {
134         return QRegion();
135     }
isIndexHidden(const QModelIndex &)136     bool isIndexHidden(const QModelIndex &) const override
137     {
138         return false;
139     }
setSelection(const QRect &,QItemSelectionModel::SelectionFlags)140     void setSelection(const QRect &, QItemSelectionModel::SelectionFlags) override
141     {
142     }
143 private:
144     QWidget *previewWidget;
145 };
146 
147 class Q_AUTOTEST_EXPORT QColumnViewPrivate : public QAbstractItemViewPrivate
148 {
149     Q_DECLARE_PUBLIC(QColumnView)
150 
151 public:
152     QColumnViewPrivate();
153     ~QColumnViewPrivate();
154     void initialize();
155 
156     QAbstractItemView *createColumn(const QModelIndex &index, bool show);
157 
158     void updateScrollbars();
159     void closeColumns(const QModelIndex &parent = QModelIndex(), bool build = false);
160     void doLayout();
161     void setPreviewWidget(QWidget *widget);
162     void checkColumnCreation(const QModelIndex &parent);
163 
164 
165     void _q_gripMoved(int offset);
166     void _q_changeCurrentColumn();
167     void _q_clicked(const QModelIndex &index);
168     void _q_columnsInserted(const QModelIndex &parent, int start, int end) override;
169 
170     QList<QAbstractItemView*> columns;
171     QVector<int> columnSizes; // used during init and corner moving
172     bool showResizeGrips;
173     int offset;
174 #if QT_CONFIG(animation)
175     QPropertyAnimation currentAnimation;
176 #endif
177     QWidget *previewWidget;
178     QAbstractItemView *previewColumn;
179 };
180 
181 /*!
182  * This is a delegate that will paint the triangle
183  */
184 // ### Qt6: QStyledItemDelegate
185 class QColumnViewDelegate : public QItemDelegate
186 {
187 
188 public:
QItemDelegate(parent)189     explicit QColumnViewDelegate(QObject *parent = nullptr) : QItemDelegate(parent) {}
~QColumnViewDelegate()190     ~QColumnViewDelegate() {}
191 
192     void paint(QPainter *painter,
193                const QStyleOptionViewItem &option,
194                const QModelIndex &index) const override;
195 };
196 
197 QT_END_NAMESPACE
198 
199 #endif //QCOLUMNVIEW_P_H
200