allow changing the waveform overview type without reloading the skin

CMakeLists.txt

@@ -1298,9 +1298,6 @@ add_library(mixxx-lib STATIC EXCLUDE_FROM_ALL
   src/widget/wnumberpos.cpp
   src/widget/wnumberrate.cpp
   src/widget/woverview.cpp
-  src/widget/woverviewhsv.cpp
-  src/widget/woverviewlmh.cpp
-  src/widget/woverviewrgb.cpp
   src/widget/wpixmapstore.cpp
   src/widget/wpushbutton.cpp
   src/widget/wraterange.cpp

src/preferences/dialog/dlgpreferences.cpp

@@ -160,17 +160,11 @@ DlgPreferences::DlgPreferences(
 
     // ugly proxy for determining whether this is being instantiated for QML or legacy QWidgets GUI
     if (pSkinLoader) {
-        DlgPrefWaveform* pWaveformPage = new DlgPrefWaveform(this, m_pConfig, pLibrary);
         addPageWidget(PreferencesPage(
-                              pWaveformPage,
+                              new DlgPrefWaveform(this, m_pConfig, pLibrary),
                               new QTreeWidgetItem(contentsTreeWidget, QTreeWidgetItem::Type)),
                 tr("Waveforms"),
                 "ic_preferences_waveforms.svg");
-        connect(pWaveformPage,
-                &DlgPrefWaveform::reloadUserInterface,
-                this,
-                &DlgPreferences::reloadUserInterface,
-                Qt::DirectConnection);
     }
 
     addPageWidget(PreferencesPage(

src/preferences/dialog/dlgprefwaveform.cpp

@@ -1,5 +1,6 @@
 #include "preferences/dialog/dlgprefwaveform.h"
 
+#include "control/controlobject.h"
 #include "library/dao/analysisdao.h"
 #include "library/library.h"
 #include "moc_dlgprefwaveform.cpp"
@@ -21,6 +22,10 @@ DlgPrefWaveform::DlgPrefWaveform(
     waveformOverviewComboBox->addItem(tr("Filtered")); // "0"
     waveformOverviewComboBox->addItem(tr("HSV")); // "1"
     waveformOverviewComboBox->addItem(tr("RGB")); // "2"
+    m_pTypeControl = std::make_unique<ControlObject>(
+            ConfigKey(QStringLiteral("[Waveform]"),
+                    QStringLiteral("WaveformOverviewType")));
+    m_pTypeControl->setReadOnly();
 
     // Populate waveform options.
     WaveformWidgetFactory* factory = WaveformWidgetFactory::instance();
@@ -205,6 +210,7 @@ void DlgPrefWaveform::slotUpdate() {
     if (overviewType != waveformOverviewComboBox->currentIndex()) {
         waveformOverviewComboBox->setCurrentIndex(overviewType);
     }
+    slotSetWaveformOverviewType(overviewType);
 
     WaveformSettings waveformSettings(m_pConfig);
     enableWaveformCaching->setChecked(waveformSettings.waveformCachingEnabled());
@@ -299,7 +305,7 @@ void DlgPrefWaveform::updateEnableUntilMark() {
 
 void DlgPrefWaveform::slotSetWaveformOverviewType(int index) {
     m_pConfig->set(ConfigKey("[Waveform]","WaveformOverviewType"), ConfigValue(index));
-    emit reloadUserInterface();
+    m_pTypeControl->forceSet(index);
 }
 
 void DlgPrefWaveform::slotSetDefaultZoom(int index) {

src/preferences/dialog/dlgprefwaveform.h

@@ -6,6 +6,7 @@
 #include "preferences/dialog/ui_dlgprefwaveformdlg.h"
 #include "preferences/usersettings.h"
 
+class ControlObject;
 class Library;
 
 class DlgPrefWaveform : public DlgPreferencePage, public Ui::DlgPrefWaveformDlg {
@@ -42,15 +43,15 @@ class DlgPrefWaveform : public DlgPreferencePage, public Ui::DlgPrefWaveformDlg
     void slotSetUntilMarkShowTime(bool checked);
     void slotSetUntilMarkAlign(int index);
     void slotSetUntilMarkTextPointSize(int value);
-  signals:
-    void reloadUserInterface();
 
   private:
     void initWaveformControl();
     void calculateCachedWaveformDiskUsage();
     void notifyRebootNecessary();
     void updateEnableUntilMark();
 
+    std::unique_ptr<ControlObject> m_pTypeControl;
+
     UserSettingsPointer m_pConfig;
     std::shared_ptr<Library> m_pLibrary;
 };

src/skin/legacy/legacyskinparser.cpp

@@ -58,9 +58,7 @@
 #include "widget/wnumberdb.h"
 #include "widget/wnumberpos.h"
 #include "widget/wnumberrate.h"
-#include "widget/woverviewhsv.h"
-#include "widget/woverviewlmh.h"
-#include "widget/woverviewrgb.h"
+#include "widget/woverview.h"
 #include "widget/wpixmapstore.h"
 #include "widget/wpushbutton.h"
 #include "widget/wraterange.h"
@@ -984,17 +982,8 @@ QWidget* LegacySkinParser::parseOverview(const QDomElement& node) {
         return nullptr;
     }
 
-    WOverview* overviewWidget = nullptr;
-
-    // "RGB" = "2", "HSV" = "1" or "Filtered" = "0" (LMH) waveform overview type
-    int type = m_pConfig->getValue(ConfigKey("[Waveform]","WaveformOverviewType"), 2);
-    if (type == 0) {
-        overviewWidget = new WOverviewLMH(group, m_pPlayerManager, m_pConfig, m_pParent);
-    } else if (type == 1) {
-        overviewWidget = new WOverviewHSV(group, m_pPlayerManager, m_pConfig, m_pParent);
-    } else {
-        overviewWidget = new WOverviewRGB(group, m_pPlayerManager, m_pConfig, m_pParent);
-    }
+    WOverview* overviewWidget =
+            new WOverview(group, m_pPlayerManager, m_pConfig, m_pParent);
 
     connect(overviewWidget,
             &WOverview::trackDropped,