int lastVisibleIndex() const;
/**
- * @return Required size for the item with the index \p index.
+ * @return Required size for all items in the model.
* The returned value might be larger than KItemListView::itemSize().
* In this case the layout grid will be stretched to assure an
* unclipped item.
*/
- QSizeF itemSizeHint(int index) const;
+ void calculateItemSizeHints(QVector<QSizeF>& sizeHints) const;
/**
* If set to true, items having child-items can be expanded to show the child-items as
virtual void recycle(KItemListWidget* widget);
- virtual QSizeF itemSizeHint(int index, const KItemListView* view) const = 0;
+ virtual void calculateItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const = 0;
virtual qreal preferredRoleColumnWidth(const QByteArray& role,
int index,
virtual KItemListWidget* create(KItemListView* view);
- virtual QSizeF itemSizeHint(int index, const KItemListView* view) const;
+ virtual void calculateItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const;
virtual qreal preferredRoleColumnWidth(const QByteArray& role,
int index,
}
template<class T>
-QSizeF KItemListWidgetCreator<T>::itemSizeHint(int index, const KItemListView* view) const
+void KItemListWidgetCreator<T>::calculateItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const
{
- return m_informant->itemSizeHint(index, view);
+ return m_informant->calculateItemSizeHints(sizeHints, view);
}
template<class T>
{
}
-QSizeF KStandardItemListWidgetInformant::itemSizeHint(int index, const KItemListView* view) const
+void KStandardItemListWidgetInformant::calculateItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const
{
- const KItemListStyleOption& option = view->styleOption();
- const int additionalRolesCount = qMax(view->visibleRoles().count() - 1, 0);
-
switch (static_cast<const KStandardItemListView*>(view)->itemLayout()) {
- case KStandardItemListWidget::IconsLayout: {
- const QString text = KStringHandler::preProcessWrap(itemText(index, view));
-
- const qreal itemWidth = view->itemSize().width();
- const qreal maxWidth = itemWidth - 2 * option.padding;
- QTextLine line;
-
- // Calculate the number of lines required for wrapping the name
- QTextOption textOption(Qt::AlignHCenter);
- textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
-
- qreal textHeight = 0;
- QTextLayout layout(text, option.font);
- layout.setTextOption(textOption);
- layout.beginLayout();
- while ((line = layout.createLine()).isValid()) {
- line.setLineWidth(maxWidth);
- line.naturalTextWidth();
- textHeight += line.height();
- }
- layout.endLayout();
-
- // Add one line for each additional information
- textHeight += additionalRolesCount * option.fontMetrics.lineSpacing();
-
- const qreal maxTextHeight = option.maxTextSize.height();
- if (maxTextHeight > 0 && textHeight > maxTextHeight) {
- textHeight = maxTextHeight;
- }
-
- return QSizeF(itemWidth, textHeight + option.iconSize + option.padding * 3);
- }
-
- case KStandardItemListWidget::CompactLayout: {
- // For each row exactly one role is shown. Calculate the maximum required width that is necessary
- // to show all roles without horizontal clipping.
- qreal maximumRequiredWidth = 0.0;
-
- const QList<QByteArray>& visibleRoles = view->visibleRoles();
- const bool showOnlyTextRole = (visibleRoles.count() == 1) && (visibleRoles.first() == "text");
-
- if (showOnlyTextRole) {
- maximumRequiredWidth = option.fontMetrics.width(itemText(index, view));
- } else {
- const QHash<QByteArray, QVariant> values = view->model()->data(index);
- foreach (const QByteArray& role, view->visibleRoles()) {
- const QString text = roleText(role, values);
- const qreal requiredWidth = option.fontMetrics.width(text);
- maximumRequiredWidth = qMax(maximumRequiredWidth, requiredWidth);
- }
- }
+ case KStandardItemListWidget::IconsLayout:
+ calculateIconsLayoutItemSizeHints(sizeHints, view);
+ break;
- qreal width = option.padding * 4 + option.iconSize + maximumRequiredWidth;
- const qreal maxWidth = option.maxTextSize.width();
- if (maxWidth > 0 && width > maxWidth) {
- width = maxWidth;
- }
- const qreal height = option.padding * 2 + qMax(option.iconSize, (1 + additionalRolesCount) * option.fontMetrics.lineSpacing());
- return QSizeF(width, height);
- }
+ case KStandardItemListWidget::CompactLayout:
+ calculateCompactLayoutItemSizeHints(sizeHints, view);
+ break;
- case KStandardItemListWidget::DetailsLayout: {
- const qreal height = option.padding * 2 + qMax(option.iconSize, option.fontMetrics.height());
- return QSizeF(-1, height);
- }
+ case KStandardItemListWidget::DetailsLayout:
+ calculateDetailsLayoutItemSizeHints(sizeHints, view);
+ break;
default:
Q_ASSERT(false);
break;
}
-
- return QSize();
}
qreal KStandardItemListWidgetInformant::preferredRoleColumnWidth(const QByteArray& role,
return values.value(role).toString();
}
+void KStandardItemListWidgetInformant::calculateIconsLayoutItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const
+{
+ const KItemListStyleOption& option = view->styleOption();
+ const QFont& font = option.font;
+ const int additionalRolesCount = qMax(view->visibleRoles().count() - 1, 0);
+
+ const qreal itemWidth = view->itemSize().width();
+ const qreal maxWidth = itemWidth - 2 * option.padding;
+ const qreal maxTextHeight = option.maxTextSize.height();
+ const qreal additionalRolesSpacing = additionalRolesCount * option.fontMetrics.lineSpacing();
+ const qreal spacingAndIconHeight = option.iconSize + option.padding * 3;
+
+ QTextOption textOption(Qt::AlignHCenter);
+ textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
+
+ for (int index = 0; index < sizeHints.count(); ++index) {
+ if (!sizeHints.at(index).isEmpty()) {
+ continue;
+ }
+
+ const QString& text = KStringHandler::preProcessWrap(itemText(index, view));
+
+ // Calculate the number of lines required for wrapping the name
+ qreal textHeight = 0;
+ QTextLayout layout(text, font);
+ layout.setTextOption(textOption);
+ layout.beginLayout();
+ QTextLine line;
+ while ((line = layout.createLine()).isValid()) {
+ line.setLineWidth(maxWidth);
+ line.naturalTextWidth();
+ textHeight += line.height();
+ }
+ layout.endLayout();
+
+ // Add one line for each additional information
+ textHeight += additionalRolesSpacing;
+
+ if (maxTextHeight > 0 && textHeight > maxTextHeight) {
+ textHeight = maxTextHeight;
+ }
+
+ sizeHints[index] = QSizeF(itemWidth, textHeight + spacingAndIconHeight);
+ }
+}
+
+void KStandardItemListWidgetInformant::calculateCompactLayoutItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const
+{
+ const KItemListStyleOption& option = view->styleOption();
+ const QFontMetrics& fontMetrics = option.fontMetrics;
+ const int additionalRolesCount = qMax(view->visibleRoles().count() - 1, 0);
+
+ const QList<QByteArray>& visibleRoles = view->visibleRoles();
+ const bool showOnlyTextRole = (visibleRoles.count() == 1) && (visibleRoles.first() == "text");
+ const qreal maxWidth = option.maxTextSize.width();
+ const qreal paddingAndIconWidth = option.padding * 4 + option.iconSize;
+ const qreal height = option.padding * 2 + qMax(option.iconSize, (1 + additionalRolesCount) * option.fontMetrics.lineSpacing());
+
+ for (int index = 0; index < sizeHints.count(); ++index) {
+ if (!sizeHints.at(index).isEmpty()) {
+ continue;
+ }
+
+ // For each row exactly one role is shown. Calculate the maximum required width that is necessary
+ // to show all roles without horizontal clipping.
+ qreal maximumRequiredWidth = 0.0;
+
+ if (showOnlyTextRole) {
+ maximumRequiredWidth = fontMetrics.width(itemText(index, view));
+ } else {
+ const QHash<QByteArray, QVariant>& values = view->model()->data(index);
+ foreach (const QByteArray& role, visibleRoles) {
+ const QString& text = roleText(role, values);
+ const qreal requiredWidth = fontMetrics.width(text);
+ maximumRequiredWidth = qMax(maximumRequiredWidth, requiredWidth);
+ }
+ }
+
+ qreal width = paddingAndIconWidth + maximumRequiredWidth;
+ if (maxWidth > 0 && width > maxWidth) {
+ width = maxWidth;
+ }
+
+ sizeHints[index] = QSizeF(width, height);
+ }
+}
+
+void KStandardItemListWidgetInformant::calculateDetailsLayoutItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const
+{
+ const KItemListStyleOption& option = view->styleOption();
+ const qreal height = option.padding * 2 + qMax(option.iconSize, option.fontMetrics.height());
+
+ for (int index = 0; index < sizeHints.count(); ++index) {
+ if (!sizeHints.at(index).isEmpty()) {
+ continue;
+ }
+
+ sizeHints[index] = QSizeF(-1, height);
+ }
+}
+
KStandardItemListWidget::KStandardItemListWidget(KItemListWidgetInformant* informant, QGraphicsItem* parent) :
KItemListWidget(informant, parent),
m_isCut(false),
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