Fix crash when disabling "Show in groups"

[dolphin.git] / src / kitemviews / kstandarditemlistwidget.cpp

diff --git a/src/kitemviews/kstandarditemlistwidget.cpp b/src/kitemviews/kstandarditemlistwidget.cpp
index f3414e3f271b0dd42c4bebd67cfa74f9e0d2e999..b429211b88c18244786819c73925c26e418578c9 100644 (file)
--- a/src/kitemviews/kstandarditemlistwidget.cpp
+++ b/src/kitemviews/kstandarditemlistwidget.cpp
@@ -249,22 +249,52 @@ void KStandardItemListWidget::paint(QPainter* painter, const QStyleOptionGraphic
 
     const KItemListStyleOption& itemListStyleOption = styleOption();
     if (isHovered()) {
-        // Blend the unhovered and hovered pixmap if the hovering
-        // animation is ongoing
         if (hoverOpacity() < 1.0) {
-            drawPixmap(painter, m_pixmap);
-        }
+            /*
+             * Linear interpolation between m_pixmap and m_hoverPixmap.
+             *
+             * Note that this cannot be achieved by painting m_hoverPixmap over
+             * m_pixmap, even if the opacities are adjusted. For details see
+             * https://git.reviewboard.kde.org/r/109614/
+             */
+            // Paint pixmap1 so that pixmap1 = m_pixmap * (1.0 - hoverOpacity())
+            QPixmap pixmap1(m_pixmap.size());
+            pixmap1.fill(Qt::transparent);
+            {
+                QPainter p(&pixmap1);
+                p.setOpacity(1.0 - hoverOpacity());
+                p.drawPixmap(0, 0, m_pixmap);
+            }
+
+            // Paint pixmap2 so that pixmap2 = m_hoverPixmap * hoverOpacity()
+            QPixmap pixmap2(pixmap1.size());
+            pixmap2.fill(Qt::transparent);
+            {
+                QPainter p(&pixmap2);
+                p.setOpacity(hoverOpacity());
+                p.drawPixmap(0, 0, m_hoverPixmap);
+            }
+
+            // Paint pixmap2 on pixmap1 using CompositionMode_Plus
+            // Now pixmap1 = pixmap2 + m_pixmap * (1.0 - hoverOpacity())
+            //             = m_hoverPixmap * hoverOpacity() + m_pixmap * (1.0 - hoverOpacity())
+            {
+                QPainter p(&pixmap1);
+                p.setCompositionMode(QPainter::CompositionMode_Plus);
+                p.drawPixmap(0, 0, pixmap2);
+            }
 
-        const qreal opacity = painter->opacity();
-        painter->setOpacity(hoverOpacity() * opacity);
-        drawPixmap(painter, m_hoverPixmap);
-        painter->setOpacity(opacity);
+            // Finally paint pixmap1 on the widget
+            drawPixmap(painter, pixmap1);
+        } else {
+            drawPixmap(painter, m_hoverPixmap);
+        }
     } else {
         drawPixmap(painter, m_pixmap);
     }
 
     painter->setFont(m_customizedFont);
-    painter->setPen(m_isHidden ? m_additionalInfoTextColor : textColor());
+    painter->setPen(textColor());
     const TextInfo* textInfo = m_textInfo.value("text");
 
     if (!textInfo) {
@@ -318,6 +348,9 @@ void KStandardItemListWidget::paint(QPainter* painter, const QStyleOptionGraphic
     painter->setPen(Qt::green);
     painter->drawRect(m_iconRect);
 
+    painter->setPen(Qt::blue);
+    painter->drawRect(m_textRect);
+
     painter->setPen(Qt::red);
     painter->drawText(QPointF(0, m_customizedFontMetrics.height()), QString::number(index()));
     painter->drawRect(rect());
@@ -493,8 +526,12 @@ void KStandardItemListWidget::setTextColor(const QColor& color)
 
 QColor KStandardItemListWidget::textColor() const
 {
-    if (m_customTextColor.isValid() && !isSelected()) {
-        return m_customTextColor;
+    if (!isSelected()) {
+        if (m_isHidden) {
+            return m_additionalInfoTextColor;
+        } else if (m_customTextColor.isValid()) {
+            return m_customTextColor;
+        }
     }
 
     const QPalette::ColorGroup group = isActiveWindow() ? QPalette::Active : QPalette::Inactive;
@@ -608,10 +645,10 @@ void KStandardItemListWidget::editedRoleChanged(const QByteArray& current, const
         if (m_roleEditor) {
             emit roleEditingCanceled(index(), current, data().value(current));
 
-            disconnect(m_roleEditor, SIGNAL(roleEditingCanceled(int,QByteArray,QVariant)),
-                       this, SLOT(slotRoleEditingCanceled(int,QByteArray,QVariant)));
-            disconnect(m_roleEditor, SIGNAL(roleEditingFinished(int,QByteArray,QVariant)),
-                       this, SLOT(slotRoleEditingFinished(int,QByteArray,QVariant)));
+            disconnect(m_roleEditor, SIGNAL(roleEditingCanceled(QByteArray,QVariant)),
+                       this, SLOT(slotRoleEditingCanceled(QByteArray,QVariant)));
+            disconnect(m_roleEditor, SIGNAL(roleEditingFinished(QByteArray,QVariant)),
+                       this, SLOT(slotRoleEditingFinished(QByteArray,QVariant)));
             m_oldRoleEditor = m_roleEditor;
             m_roleEditor->hide();
             m_roleEditor = 0;
@@ -629,7 +666,6 @@ void KStandardItemListWidget::editedRoleChanged(const QByteArray& current, const
     const TextInfo* textInfo = m_textInfo.value("text");
 
     m_roleEditor = new KItemListRoleEditor(parent);
-    m_roleEditor->setIndex(index());
     m_roleEditor->setRole(current);
     m_roleEditor->setFont(styleOption().font);
 
@@ -648,10 +684,10 @@ void KStandardItemListWidget::editedRoleChanged(const QByteArray& current, const
         m_roleEditor->setTextCursor(cursor);
     }
 
-    connect(m_roleEditor, SIGNAL(roleEditingCanceled(int,QByteArray,QVariant)),
-            this, SLOT(slotRoleEditingCanceled(int,QByteArray,QVariant)));
-    connect(m_roleEditor, SIGNAL(roleEditingFinished(int,QByteArray,QVariant)),
-            this, SLOT(slotRoleEditingFinished(int,QByteArray,QVariant)));
+    connect(m_roleEditor, SIGNAL(roleEditingCanceled(QByteArray,QVariant)),
+            this, SLOT(slotRoleEditingCanceled(QByteArray,QVariant)));
+    connect(m_roleEditor, SIGNAL(roleEditingFinished(QByteArray,QVariant)),
+            this, SLOT(slotRoleEditingFinished(QByteArray,QVariant)));
 
     // Adjust the geometry of the editor
     QRectF rect = roleEditingRect(current);
@@ -712,21 +748,19 @@ void KStandardItemListWidget::slotCutItemsChanged()
     }
 }
 
-void KStandardItemListWidget::slotRoleEditingCanceled(int index,
-                                                      const QByteArray& role,
+void KStandardItemListWidget::slotRoleEditingCanceled(const QByteArray& role,
                                                       const QVariant& value)
 {
     closeRoleEditor();
-    emit roleEditingCanceled(index, role, value);
+    emit roleEditingCanceled(index(), role, value);
     setEditedRole(QByteArray());
 }
 
-void KStandardItemListWidget::slotRoleEditingFinished(int index,
-                                                      const QByteArray& role,
+void KStandardItemListWidget::slotRoleEditingFinished(const QByteArray& role,
                                                       const QVariant& value)
 {
     closeRoleEditor();
-    emit roleEditingFinished(index, role, value);
+    emit roleEditingFinished(index(), role, value);
     setEditedRole(QByteArray());
 }
 
@@ -1116,7 +1150,7 @@ void KStandardItemListWidget::updateCompactLayoutTextCache()
         y += lineSpacing;
     }
 
-    m_textRect = QRectF(x - option.padding, 0, maximumRequiredTextWidth + 2 * option.padding, widgetHeight);
+    m_textRect = QRectF(x - 2 * option.padding, 0, maximumRequiredTextWidth + 3 * option.padding, widgetHeight);
 }
 
 void KStandardItemListWidget::updateDetailsLayoutTextCache()
@@ -1174,8 +1208,8 @@ void KStandardItemListWidget::updateDetailsLayoutTextCache()
             const qreal textWidth = option.extendedSelectionRegion
                                     ? size().width() - textInfo->pos.x()
                                     : requiredWidth + 2 * option.padding;
-            m_textRect = QRectF(textInfo->pos.x() - option.padding, 0,
-                                textWidth, size().height());
+            m_textRect = QRectF(textInfo->pos.x() - 2 * option.padding, 0,
+                                textWidth + option.padding, size().height());
 
             // The column after the name should always be aligned on the same x-position independent
             // from the expansion-level shown in the name column
@@ -1273,10 +1307,10 @@ QRectF KStandardItemListWidget::roleEditingRect(const QByteArray& role) const
 
 void KStandardItemListWidget::closeRoleEditor()
 {
-    disconnect(m_roleEditor, SIGNAL(roleEditingCanceled(int,QByteArray,QVariant)),
-               this, SLOT(slotRoleEditingCanceled(int,QByteArray,QVariant)));
-    disconnect(m_roleEditor, SIGNAL(roleEditingFinished(int,QByteArray,QVariant)),
-               this, SLOT(slotRoleEditingFinished(int,QByteArray,QVariant)));
+    disconnect(m_roleEditor, SIGNAL(roleEditingCanceled(QByteArray,QVariant)),
+               this, SLOT(slotRoleEditingCanceled(QByteArray,QVariant)));
+    disconnect(m_roleEditor, SIGNAL(roleEditingFinished(QByteArray,QVariant)),
+               this, SLOT(slotRoleEditingFinished(QByteArray,QVariant)));
 
     if (m_roleEditor->hasFocus()) {
         // If the editing was not ended by a FocusOut event, we have