Fix KisDlgFilter to always show the name of the currently selected filter

REVIEW: 117949

Thanks boud for review

krita/ui/dialogs/kis_dlg_filter.cpp

@@ -78,7 +78,7 @@ KisDlgFilter::KisDlgFilter(KisView2 *view, KisNodeSP node, KisFilterManager *fil
     connect(d->uiFilterDialog.buttonBox, SIGNAL(rejected()), SLOT(reject()));
     connect(d->uiFilterDialog.checkBoxPreview, SIGNAL(stateChanged(int)), SLOT(previewCheckBoxChange(int)));
 
-    connect(d->uiFilterDialog.filterSelection, SIGNAL(configurationChanged()), SLOT(updatePreview()));
+    connect(d->uiFilterDialog.filterSelection, SIGNAL(configurationChanged()), SLOT(filterSelectionChanged()));
     connect(this, SIGNAL(finished(int)), SLOT(close()));
 
     KConfigGroup group(KGlobal::config(), "filterdialog");
@@ -93,12 +93,17 @@ KisDlgFilter::~KisDlgFilter()
 void KisDlgFilter::setFilter(KisFilterSP f)
 {
     Q_ASSERT(f);
-    setWindowTitle(f->name());
+    setDialogTitle(f);
     d->uiFilterDialog.filterSelection->setFilter(f);
     d->uiFilterDialog.pushButtonCreateMaskEffect->setEnabled(f->supportsAdjustmentLayers());
     updatePreview();
 }
 
+void KisDlgFilter::setDialogTitle(KisFilterSP filter)
+{
+    setWindowTitle(filter.isNull() ? i18n("Filter") : i18n("Filter: %1", filter->name()));
+}
+
 void KisDlgFilter::startApplyingFilter(KisSafeFilterConfigurationSP config)
 {
     if (!d->uiFilterDialog.filterSelection->configuration()) return;
@@ -175,6 +180,15 @@ void KisDlgFilter::previewCheckBoxChange(int state)
     group.config()->sync();
 }
 
+void KisDlgFilter::filterSelectionChanged()
+{
+    KisFilterSP filter = d->uiFilterDialog.filterSelection->currentFilter();
+    setDialogTitle(filter);
+    d->uiFilterDialog.pushButtonCreateMaskEffect->setEnabled(filter.isNull() ? false : filter->supportsAdjustmentLayers());
+    updatePreview();
+}
+
+
 void KisDlgFilter::resizeEvent(QResizeEvent* event)
 {
     QDialog::resizeEvent(event);

krita/ui/dialogs/kis_dlg_filter.h

@@ -42,10 +42,6 @@ public:
 
     void setFilter(KisFilterSP f);
 
-public slots:
-
-    void updatePreview();
-
 protected slots:
 
     void apply();
@@ -56,10 +52,14 @@ protected slots:
 
     void previewCheckBoxChange(int state);
 
+    void filterSelectionChanged();
+
     virtual void resizeEvent(QResizeEvent* );
 
 private:
     void startApplyingFilter(KisSafeFilterConfigurationSP config);
+    void setDialogTitle(KisFilterSP f);
+    void updatePreview();
 
 private:
     struct Private;