don't switch colors on new themes

new themes as breeze aren't supposed to just use the button graphics
on top, that also mean, don't switch palette on top if the new prefix
is there

src/declarativeimports/core/framesvgitem.cpp

@@ -349,6 +349,11 @@ QVariant FrameSvgItem::prefix() const
     return m_prefixes;
 }
 
+QString FrameSvgItem::usedPrefix() const
+{
+    return m_frameSvg->prefix();
+}
+
 FrameSvgItemMargins *FrameSvgItem::margins() const
 {
     return m_margins;
@@ -561,6 +566,8 @@ void FrameSvgItem::applyPrefixes()
         return;
     }
 
+    const QString oldPrefix = m_frameSvg->prefix();
+
     if (m_prefixes.isEmpty()) {
         m_frameSvg->setElementPrefix(QString());
         return;
@@ -578,6 +585,9 @@ void FrameSvgItem::applyPrefixes()
         //this setElementPrefix is done to keep the same behavior as before, when it was a simple string
         m_frameSvg->setElementPrefix(m_prefixes.last());
     }
+    if (oldPrefix != m_frameSvg->prefix()) {
+        emit usedPrefixChanged();
+    }
 }
 
 } // Plasma namespace

src/declarativeimports/core/framesvgitem.h

@@ -126,6 +126,12 @@ class FrameSvgItem : public QQuickItem
      */
     Q_PROPERTY(QVariant prefix READ prefix WRITE setPrefix NOTIFY prefixChanged)
 
+    /**
+     * the actual prefix that was used, if a fallback chain array was set as "prefix"
+     * @since 5.34
+     */
+    Q_PROPERTY(QString usedPrefix READ usedPrefix NOTIFY usedPrefixChanged)
+
     /**
      * The margins of the frame, read only
      * @see FrameSvgItemMargins
@@ -192,6 +198,8 @@ public:
     void setPrefix(const QVariant &prefix);
     QVariant prefix() const;
 
+    QString usedPrefix() const;
+
     void setEnabledBorders(const Plasma::FrameSvg::EnabledBorders borders);
     Plasma::FrameSvg::EnabledBorders enabledBorders() const;
 
@@ -232,6 +240,7 @@ Q_SIGNALS:
     void colorGroupChanged();
     void repaintNeeded();
     void statusChanged();
+    void usedPrefixChanged();
 
 private Q_SLOTS:
     void doUpdate();

src/declarativeimports/plasmastyle/ToolButtonStyle.qml

@@ -83,6 +83,14 @@ QtQuickControlStyle.ButtonStyle {
                 colorGroup: controlHovered || !flat ? PlasmaCore.Theme.ButtonColorGroup : PlasmaCore.ColorScope.colorGroup
             }
 
+            //NOTE: this is used only to check elements existence
+            PlasmaCore.FrameSvgItem {
+                id: buttonsurfaceChecker
+                visible: false
+                imagePath: "widgets/button"
+                prefix: style.flat ? ["toolbutton-hover", "normal"] : "normal"
+            }
+
             PlasmaComponents.Label {
                 id: label
                 anchors.verticalCenter: parent.verticalCenter
@@ -91,7 +99,7 @@ QtQuickControlStyle.ButtonStyle {
                 font: control.font || theme.defaultFont
                 visible: control.text != ""
                 Layout.fillWidth: true
-                color: controlHovered || !flat ? theme.buttonTextColor : PlasmaCore.ColorScope.textColor
+                color: (controlHovered || !flat) && buttonsurfaceChecker.usedPrefix != "toolbutton-hover" ? theme.buttonTextColor : PlasmaCore.ColorScope.textColor
                 horizontalAlignment: icon.valid ? Text.AlignLeft : Text.AlignHCenter
                 elide: Text.ElideRight
             }
@@ -113,7 +121,7 @@ QtQuickControlStyle.ButtonStyle {
                         visible: control.menu !== null
                         svg: PlasmaCore.Svg {
                             imagePath: "widgets/arrows"
-                            colorGroup: style.controlHovered || !style.flat ? PlasmaCore.Theme.ButtonColorGroup : PlasmaCore.ColorScope.colorGroup
+                            colorGroup: (style.controlHovered || !style.flat) && buttonsurfaceChecker.usedPrefix != "toolbutton-hover" ? PlasmaCore.Theme.ButtonColorGroup : PlasmaCore.ColorScope.colorGroup
                         }
                         elementId: "down-arrow"
                     }
@@ -224,7 +232,6 @@ QtQuickControlStyle.ButtonStyle {
                 }
             }
 
-
             //This code is duplicated here and Button and ToolButton
             //maybe we can make an AbstractButton class?
             PlasmaCore.FrameSvgItem {