Audiomixerboard: Auto-reduce size when switching between meter styles

ChangeLog

@@ -1,8 +1,8 @@
 
 ### 3.8.2beta1dev <- NOTE: the release version number will be 3.8.2 ###
 
-- Client: Added selection option for level meter style (#1688).
-  (contributed by @henkdegroot)
+- Client: Added selection option for level meter style (#1688, #2352).
+  (contributed by @henkdegroot, @hoffie, @pgScorpio)
 
 - Client: On Windows, if no driver found while installing, the "Run Jamulus"
   option will not be checked (#2103).

src/levelmeter.cpp

@@ -61,9 +61,9 @@ CLevelMeter::CLevelMeter ( QWidget* parent ) : QWidget ( parent ), eLevelMeterTy
     pBarMeter->setFormat ( "" );                        // suppress percent numbers
 
     // setup stacked layout for meter type switching mechanism
-    pStackedLayout = new QStackedLayout ( this );
-    pStackedLayout->addWidget ( pLEDMeter );
-    pStackedLayout->addWidget ( pBarMeter );
+    pMinStackedLayout = new CMinimumStackedLayout ( this );
+    pMinStackedLayout->addWidget ( pLEDMeter );
+    pMinStackedLayout->addWidget ( pBarMeter );
 
     // according to QScrollArea description: "When using a scroll area to display the
     // contents of a custom widget, it is important to ensure that the size hint of
@@ -103,7 +103,7 @@ void CLevelMeter::SetLevelMeterType ( const ELevelMeterType eNType )
         {
             vecpLEDs[iLEDIdx]->SetColor ( cLED::RL_BLACK );
         }
-        pStackedLayout->setCurrentIndex ( 0 );
+        pMinStackedLayout->setCurrentIndex ( 0 );
         break;
 
     case MT_SLIM_LED:
@@ -112,7 +112,7 @@ void CLevelMeter::SetLevelMeterType ( const ELevelMeterType eNType )
         {
             vecpLEDs[iLEDIdx]->SetColor ( cLED::RL_SLIM_BLACK );
         }
-        pStackedLayout->setCurrentIndex ( 0 );
+        pMinStackedLayout->setCurrentIndex ( 0 );
         break;
 
     case MT_SMALL_LED:
@@ -121,21 +121,12 @@ void CLevelMeter::SetLevelMeterType ( const ELevelMeterType eNType )
         {
             vecpLEDs[iLEDIdx]->SetColor ( cLED::RL_SMALL_BLACK );
         }
-        pStackedLayout->setCurrentIndex ( 0 );
+        pMinStackedLayout->setCurrentIndex ( 0 );
         break;
 
     case MT_BAR:
-        pStackedLayout->setCurrentIndex ( 1 );
-        break;
-
     case MT_SLIM_BAR:
-        // set all LEDs to disabled, otherwise we would not get our desired small width
-        for ( int iLEDIdx = 0; iLEDIdx < NUM_LEDS_INCL_CLIP_LED; iLEDIdx++ )
-        {
-            vecpLEDs[iLEDIdx]->SetColor ( cLED::RL_DISABLED );
-        }
-
-        pStackedLayout->setCurrentIndex ( 1 );
+        pMinStackedLayout->setCurrentIndex ( 1 );
         break;
     }
 

src/levelmeter.h

@@ -29,7 +29,6 @@
 #include <QTimer>
 #include <QLayout>
 #include <QProgressBar>
-#include <QStackedLayout>
 #include "util.h"
 #include "global.h"
 
@@ -107,10 +106,10 @@ class CLevelMeter : public QWidget
 
     void SetBarMeterStyleAndClipStatus ( const ELevelMeterType eNType, const bool bIsClip );
 
-    QStackedLayout* pStackedLayout;
-    ELevelMeterType eLevelMeterType;
-    CVector<cLED*>  vecpLEDs;
-    QProgressBar*   pBarMeter;
+    CMinimumStackedLayout* pMinStackedLayout;
+    ELevelMeterType        eLevelMeterType;
+    CVector<cLED*>         vecpLEDs;
+    QProgressBar*          pBarMeter;
 
     QTimer TimerClip;
 

src/util.cpp

@@ -680,6 +680,16 @@ QString TruncateString ( QString str, int position )
     }
     return str.left ( position );
 }
+
+QSize CMinimumStackedLayout::sizeHint() const
+{
+    // always use the size of the currently visible widget:
+    if ( currentWidget() )
+    {
+        return currentWidget()->sizeHint();
+    }
+    return QStackedLayout::sizeHint();
+}
 #endif
 
 /******************************************************************************\

src/util.h

@@ -41,6 +41,7 @@
 #    include <QDesktopServices>
 #    include <QKeyEvent>
 #    include <QTextBoundaryFinder>
+#    include <QStackedLayout>
 #    include "ui_aboutdlgbase.h"
 #endif
 #include <QFile>
@@ -445,6 +446,15 @@ public slots:
 signals:
     void LanguageChanged ( QString strLanguage );
 };
+
+// StackedLayout which auto-reduces to the size of the currently visible widget
+class CMinimumStackedLayout : public QStackedLayout
+{
+    Q_OBJECT
+public:
+    CMinimumStackedLayout ( QWidget* parent = nullptr ) : QStackedLayout ( parent ) {}
+    virtual QSize sizeHint() const override;
+};
 #endif
 
 /******************************************************************************\