Fix Dexed ComboBoxImage popup only showing once, closes #8

ports/dexed/source/DXComponents.cpp

@@ -360,21 +360,30 @@ void ComboBoxImage::paint(Graphics &g) {
 }
 
 ComboBoxImage::ComboBoxImage() {
-    onPopup = false;
     itemPos[0] = -1;
 }
 
-void ComboBoxImage::showPopup() {
-    if ( !onPopup ) { 
-        onPopup = true;
-        int idx = popup.show() - 1;
-        onPopup = false;
-        if ( idx < 0 )
-            return;
-        setSelectedItemIndex(idx);
+static void comboBoxPopupMenuFinishedCallback (int result, ComboBoxImage* combo)
+{
+    if (combo != nullptr)
+    {
+        combo->hidePopup();
+
+        if (result != 0)
+            combo->setSelectedId (result);
     }
 }
 
+void ComboBoxImage::showPopup() {
+
+    popup.showMenuAsync (PopupMenu::Options().withTargetComponent (this)
+                                             .withItemThatMustBeVisible (getSelectedId())
+                                             .withMinimumWidth (getWidth())
+                                             .withMaximumNumColumns (1)
+                                             .withStandardItemHeight (itemHeight),
+                         ModalCallbackFunction::forComponent (comboBoxPopupMenuFinishedCallback, this));
+}
+
 void ComboBoxImage::setImage(Image image) {
     items = image;
     

ports/dexed/source/DXComponents.h

@@ -58,7 +58,6 @@ class ComboBoxImage : public ComboBox {
     Image items;
     int itemHeight;
     PopupMenu popup;
-    bool onPopup;
 
     int itemPos[4];
 public: