if the user did set an implicit size, keep it

Summary:
if the user code did something like
IconItem {
   implicitWidth: 32
   implicitHeight: 32
}

then never automatically update implicitWidth or height.
this favors compatibility and fixes the desktop
toolbox appearance

Test Plan:
textbox works, other icon items in plasmashell seems properly sized.
applet alternatives fix is still needed

Reviewers: #plasma, hein

Reviewed By: #plasma, hein

Subscribers: hein, davidedmundson, plasma-devel, #frameworks

Tags: #plasma, #frameworks

Differential Revision: https://phabricator.kde.org/D5243

src/declarativeimports/core/iconitem.cpp

@@ -49,6 +49,8 @@ IconItem::IconItem(QQuickItem *parent)
       m_sizeChanged(false),
       m_allowNextAnimation(false),
       m_blockNextAnimation(false),
+      m_implicitHeightSetByUser(false),
+      m_implicitWidthSetByUser(false),
       m_colorGroup(Plasma::Theme::NormalColorGroup),
       m_animValue(0)
 {
@@ -75,6 +77,9 @@ IconItem::IconItem(QQuickItem *parent)
     connect(this, SIGNAL(overlaysChanged()),
             this, SLOT(schedulePixmapUpdate()));
 
+    connect(this, &IconItem::implicitWidthChanged, this, &IconItem::implicitWidthChanged2);
+    connect(this, &IconItem::implicitHeightChanged, this, &IconItem::implicitHeightChanged2);
+
     updateImplicitSize();
 }
 
@@ -88,7 +93,13 @@ void IconItem::updateImplicitSize()
         const QSize &s = m_imageIcon.size();
 
         if (s.isValid()) {
-            setImplicitSize(s.width(), s.height());
+            if (!m_implicitWidthSetByUser && !m_implicitHeightSetByUser) {
+                setImplicitSize(s.width(), s.height());
+            } else if (!m_implicitWidthSetByUser) {
+                setImplicitWidth(s.width());
+            } else if (!m_implicitHeightSetByUser) {
+                setImplicitHeight(s.height());
+            }
 
             return;
         }
@@ -105,7 +116,13 @@ void IconItem::updateImplicitSize()
             s = m_svgIcon->size();
         }
         if (s.isValid()) {
-            setImplicitSize(s.width(), s.height());
+            if (!m_implicitWidthSetByUser && !m_implicitHeightSetByUser) {
+                setImplicitSize(s.width(), s.height());
+            } else if (!m_implicitWidthSetByUser) {
+                setImplicitWidth(s.width());
+            } else if (!m_implicitHeightSetByUser) {
+                setImplicitHeight(s.height());
+            }
 
             return;
         }
@@ -113,7 +130,14 @@ void IconItem::updateImplicitSize()
 
     // Fall back to initializing implicit size to the Dialog size.
     const int implicitSize = KIconLoader::global()->currentSize(KIconLoader::Dialog);
-    setImplicitSize(implicitSize, implicitSize);
+
+    if (!m_implicitWidthSetByUser && !m_implicitHeightSetByUser) {
+        setImplicitSize(implicitSize, implicitSize);
+    } else if (!m_implicitWidthSetByUser) {
+        setImplicitWidth(implicitSize);
+    } else if (!m_implicitHeightSetByUser) {
+        setImplicitHeight(implicitSize);
+    }
 }
 
 void IconItem::setSource(const QVariant &source)
@@ -418,6 +442,20 @@ Plasma::Svg::Status IconItem::status() const
     return m_status;
 }
 
+void IconItem::setImplicitHeight2(int height)
+{
+    m_implicitHeightSetByUser = true;
+    setImplicitHeight(height);
+    emit implicitHeightChanged2();
+}
+
+void IconItem::setImplicitWidth2(int width)
+{
+    m_implicitWidthSetByUser = true;
+    setImplicitWidth(width);
+    emit implicitWidthChanged2();
+}
+
 void IconItem::updatePolish()
 {
     QQuickItem::updatePolish();

src/declarativeimports/core/iconitem.h

@@ -119,6 +119,10 @@ class IconItem : public QQuickItem
      */
     Q_PROPERTY(int paintedHeight READ paintedHeight NOTIFY paintedSizeChanged)
 
+    Q_PROPERTY(int implicitHeight READ implicitHeight WRITE setImplicitHeight2 NOTIFY implicitHeightChanged2)
+
+    Q_PROPERTY(int implicitWidth READ implicitWidth WRITE setImplicitWidth2 NOTIFY implicitWidthChanged2)
+
 public:
     IconItem(QQuickItem *parent = 0);
     ~IconItem();
@@ -155,6 +159,9 @@ public:
     void setStatus(Plasma::Svg::Status status);
     Plasma::Svg::Status status() const;
 
+    void setImplicitHeight2(int height);
+    void setImplicitWidth2(int height);
+
     void updatePolish() Q_DECL_OVERRIDE;
     QSGNode* updatePaintNode(QSGNode * oldNode, UpdatePaintNodeData * updatePaintNodeData) Q_DECL_OVERRIDE;
 
@@ -176,6 +183,8 @@ Q_SIGNALS:
     void colorGroupChanged();
     void paintedSizeChanged();
     void statusChanged();
+    void implicitHeightChanged2();
+    void implicitWidthChanged2();
 
 private Q_SLOTS:
     void schedulePixmapUpdate();
@@ -210,6 +219,8 @@ private:
     bool m_sizeChanged;
     bool m_allowNextAnimation;
     bool m_blockNextAnimation;
+    bool m_implicitHeightSetByUser;
+    bool m_implicitWidthSetByUser;
 
     QPixmap m_iconPixmap;
     QPixmap m_oldIconPixmap;