GUI fixes: Elide playback name label if needed and…

If the name is too long, elide it centrally, so that a horizontal scrollbar isn't needed (and isn't shown).

Also, don't force a height on progressbars because some widget styles may not show any bar with a forced height.

Closes #99 and closes #75

src/CMakeLists.txt

@@ -16,6 +16,7 @@ set(pavucontrol-qt_HDRS
     sourceoutputwidget.h
     sourcewidget.h
     streamwidget.h
+    elidinglabel.h
 )
 
 set(pavucontrol-qt_SRCS
@@ -31,6 +32,7 @@ set(pavucontrol-qt_SRCS
     sourceoutputwidget.cc
     sourcewidget.cc
     streamwidget.cc
+    elidinglabel.cc
 )
 
 set(pavucontrol-qt_UI

src/minimalstreamwidget.cc

@@ -38,7 +38,6 @@ MinimalStreamWidget::MinimalStreamWidget(QWidget *parent) :
     volumeMeterVisible(true) {
 
     peakProgressBar->setTextVisible(false);
-    peakProgressBar->setMaximumHeight(4 /* FIXME: hardcoded */);
     peakProgressBar->hide();
 }
 

src/streamwidget.ui

@@ -27,7 +27,7 @@
       </widget>
      </item>
      <item>
-      <widget class="QLabel" name="nameLabel">
+      <widget class="ElidingLabel" name="nameLabel">
        <property name="text">
         <string>Device Title</string>
        </property>
@@ -103,6 +103,13 @@
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>ElidingLabel</class>
+   <extends>QLabel</extends>
+   <header>elidinglabel.h</header>
+  </customwidget>
+ </customwidgets>
  <resources/>
  <connections/>
 </ui>