src/kitemviews/kstandarditemlistwidget.h

   1 /*
   2  * SPDX-FileCopyrightText: 2012 Peter Penz <peter.penz19@gmail.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-or-later
   5  */
   6
   7 #ifndef KSTANDARDITEMLISTWIDGET_H
   8 #define KSTANDARDITEMLISTWIDGET_H
   9
  10 #include "dolphin_export.h"
  11 #include "kitemviews/kitemlistwidget.h"
  12
  13 #include <QPixmap>
  14 #include <QPointF>
  15 #include <QStaticText>
  16
  17 class KItemListRoleEditor;
  18 class KItemListStyleOption;
  19 class KItemListView;
  20
  21 class DOLPHIN_EXPORT KStandardItemListWidgetInformant : public KItemListWidgetInformant
  22 {
  23 public:
  24     KStandardItemListWidgetInformant();
  25     ~KStandardItemListWidgetInformant() override;
  26
  27     void calculateItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const override;
  28
  29     qreal preferredRoleColumnWidth(const QByteArray& role,
  30                                            int index,
  31                                            const KItemListView* view) const override;
  32 protected:
  33     /**
  34      * @return The value of the "text" role. The default implementation returns
  35      *         view->model()->data(index)["text"]. If a derived class can
  36      *         prevent the (possibly expensive) construction of the
  37      *         QHash<QByteArray, QVariant> returned by KItemModelBase::data(int),
  38      *         it can reimplement this function.
  39      */
  40     virtual QString itemText(int index, const KItemListView* view) const;
  41
  42     /**
  43      * @return The value of the "isLink" role. The default implementation returns false.
  44      *         The derived class should reimplement this function, when information about
  45      *         links is available and in usage.
  46      */
  47     virtual bool itemIsLink(int index, const KItemListView* view) const;
  48
  49     /**
  50      * @return String representation of the role \a role. The representation of
  51      *         a role might depend on other roles, so the values of all roles
  52      *         are passed as parameter.
  53      */
  54     virtual QString roleText(const QByteArray& role,
  55                              const QHash<QByteArray, QVariant>& values) const;
  56
  57     /**
  58     * @return A font based on baseFont which is customized for symlinks.
  59     */
  60     virtual QFont customizedFontForLinks(const QFont& baseFont) const;
  61
  62     void calculateIconsLayoutItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const;
  63     void calculateCompactLayoutItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const;
  64     void calculateDetailsLayoutItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const;
  65
  66     friend class KStandardItemListWidget; // Accesses roleText()
  67 };
  68
  69 /**
  70  * @brief Itemlist widget implementation for KStandardItemListView and KStandardItemModel.
  71  */
  72 class DOLPHIN_EXPORT KStandardItemListWidget : public KItemListWidget
  73 {
  74     Q_OBJECT
  75
  76 public:
  77     enum Layout
  78     {
  79         IconsLayout,
  80         CompactLayout,
  81         DetailsLayout
  82     };
  83
  84     KStandardItemListWidget(KItemListWidgetInformant* informant, QGraphicsItem* parent);
  85     ~KStandardItemListWidget() override;
  86
  87     void setLayout(Layout layout);
  88     Layout layout() const;
  89
  90     void setSupportsItemExpanding(bool supportsItemExpanding);
  91     bool supportsItemExpanding() const;
  92
  93     void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr) override;
  94
  95     QRectF iconRect() const override;
  96     QRectF textRect() const override;
  97     QRectF textFocusRect() const override;
  98     QRectF selectionRect() const override;
  99     QRectF expansionToggleRect() const override;
 100     QRectF selectionToggleRect() const override;
 101     QPixmap createDragPixmap(const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr) override;
 102
 103     static KItemListWidgetInformant* createInformant();
 104
 105 protected:
 106     /**
 107      * Invalidates the cache which results in calling KStandardItemListWidget::refreshCache() as
 108      * soon as the item need to gets repainted.
 109      */
 110     void invalidateCache();
 111
 112     /**
 113      * Is called if the cache got invalidated by KStandardItemListWidget::invalidateCache().
 114      * The default implementation is empty.
 115      */
 116     virtual void refreshCache();
 117
 118     /**
 119      * @return True if the give role should be right aligned when showing it inside a column.
 120      *         Per default false is returned.
 121      */
 122     virtual bool isRoleRightAligned(const QByteArray& role) const;
 123
 124     /**
 125      * @return True if the item should be visually marked as hidden item. Per default
 126      *         false is returned.
 127      */
 128     virtual bool isHidden() const;
 129
 130     /**
 131      * @return A font based on baseFont which is customized according to the data shown in the widget.
 132      */
 133     virtual QFont customizedFont(const QFont& baseFont) const;
 134
 135     virtual QPalette::ColorRole normalTextColorRole() const;
 136
 137     void setTextColor(const QColor& color);
 138     QColor textColor() const;
 139
 140     void setOverlay(const QPixmap& overlay);
 141     QPixmap overlay() const;
 142
 143     /**
 144      * @see KStandardItemListWidgetInformant::roleText().
 145      */
 146     QString roleText(const QByteArray& role, const QHash<QByteArray, QVariant>& values) const;
 147
 148     /**
 149      * Fixes:
 150      * Select the text without MIME-type extension
 151      * This is file-item-specific and should be moved
 152      * into KFileItemListWidget.
 153      *
 154      * Inherited classes can define, if the MIME-type extension
 155      * should be selected or not.
 156      *
 157      * @return Selection length (with or without MIME-type extension)
 158      */
 159     virtual int selectionLength(const QString& text) const;
 160
 161     void dataChanged(const QHash<QByteArray, QVariant>& current, const QSet<QByteArray>& roles = QSet<QByteArray>()) override;
 162     void visibleRolesChanged(const QList<QByteArray>& current, const QList<QByteArray>& previous) override;
 163     void columnWidthChanged(const QByteArray& role, qreal current, qreal previous) override;
 164     void styleOptionChanged(const KItemListStyleOption& current, const KItemListStyleOption& previous) override;
 165     void hoveredChanged(bool hovered) override;
 166     void selectedChanged(bool selected) override;
 167     void siblingsInformationChanged(const QBitArray& current, const QBitArray& previous) override;
 168     void editedRoleChanged(const QByteArray& current, const QByteArray& previous) override;
 169     void resizeEvent(QGraphicsSceneResizeEvent* event) override;
 170     void showEvent(QShowEvent* event) override;
 171     void hideEvent(QHideEvent* event) override;
 172     bool event(QEvent *event) override;
 173
 174 public slots:
 175     void finishRoleEditing();
 176
 177 private slots:
 178     void slotCutItemsChanged();
 179     void slotRoleEditingCanceled(const QByteArray& role, const QVariant& value);
 180     void slotRoleEditingFinished(const QByteArray& role, const QVariant& value);
 181
 182 private:
 183     void triggerCacheRefreshing();
 184     void updateExpansionArea();
 185     void updatePixmapCache();
 186
 187     void updateTextsCache();
 188     void updateIconsLayoutTextCache();
 189     void updateCompactLayoutTextCache();
 190     void updateDetailsLayoutTextCache();
 191
 192     void updateAdditionalInfoTextColor();
 193
 194     void drawPixmap(QPainter* painter, const QPixmap& pixmap);
 195     void drawSiblingsInformation(QPainter* painter);
 196
 197     QRectF roleEditingRect(const QByteArray &role) const;
 198
 199     QString elideRightKeepExtension(const QString &text, int elidingWidth) const;
 200
 201     /**
 202      * Closes the role editor and returns the focus back
 203      * to the KItemListContainer.
 204      */
 205     void closeRoleEditor();
 206
 207     static QPixmap pixmapForIcon(const QString& name, const QStringList& overlays, int size, QIcon::Mode mode);
 208
 209     /**
 210      * @return Preferred size of the rating-image based on the given
 211      *         style-option. The height of the font is taken as
 212      *         reference.
 213      */
 214     static QSizeF preferredRatingSize(const KItemListStyleOption& option);
 215
 216     /**
 217      * @return Horizontal padding in pixels that is added to the required width of
 218      *         a column to display the content.
 219      */
 220     static qreal columnPadding(const KItemListStyleOption& option);
 221
 222 private:
 223     bool m_isCut;
 224     bool m_isHidden;
 225     QFont m_customizedFont;
 226     QFontMetrics m_customizedFontMetrics;
 227     bool m_isExpandable;
 228     bool m_supportsItemExpanding;
 229
 230     bool m_dirtyLayout;
 231     bool m_dirtyContent;
 232     QSet<QByteArray> m_dirtyContentRoles;
 233
 234     Layout m_layout;
 235     QPointF m_pixmapPos;
 236     QPixmap m_pixmap;
 237     QSize m_scaledPixmapSize; //Size of the pixmap in device independent pixels
 238
 239     QRectF m_iconRect;          // Cache for KItemListWidget::iconRect()
 240     QPixmap m_hoverPixmap;      // Cache for modified m_pixmap when hovering the item
 241
 242     struct TextInfo
 243     {
 244         QPointF pos;
 245         QStaticText staticText;
 246     };
 247     QHash<QByteArray, TextInfo*> m_textInfo;
 248
 249     QRectF m_textRect;
 250
 251     QList<QByteArray> m_sortedVisibleRoles;
 252
 253     QRectF m_expansionArea;
 254
 255     QColor m_customTextColor;
 256     QColor m_additionalInfoTextColor;
 257
 258     QPixmap m_overlay;
 259     QPixmap m_rating;
 260
 261     KItemListRoleEditor* m_roleEditor;
 262     KItemListRoleEditor* m_oldRoleEditor;
 263
 264     friend class KStandardItemListWidgetInformant; // Accesses private static methods to be able to
 265                                                    // share a common layout calculation
 266 };
 267
 268 #endif