Device GUIs: Constain window size via minimumSize/maximumSize, rather than handling resizeEvent. Add maximum button. Hide size buttons when window size is fixed

plugins/samplesource/usrpinput/usrpinputgui.cpp

@@ -21,7 +21,6 @@
 #include <QDebug>
 #include <QMessageBox>
 #include <QFileDialog>
-#include <QResizeEvent>
 
 #include <algorithm>
 
@@ -51,7 +50,7 @@ USRPInputGUI::USRPInputGUI(DeviceUISet *deviceUISet, QWidget* parent) :
     m_usrpInput = (USRPInput*) m_deviceUISet->m_deviceAPI->getSampleSource();
 
     ui->setupUi(getContents());
-    setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    sizeToContents();
     getContents()->setStyleSheet("#USRPInputGUI { background-color: rgb(64, 64, 64); }");
     m_helpURL = "plugins/samplesource/usrpinput/readme.md";
 
@@ -157,12 +156,6 @@ bool USRPInputGUI::deserialize(const QByteArray& data)
     }
 }
 
-void USRPInputGUI::resizeEvent(QResizeEvent* size)
-{
-    adjustSize();
-    size->accept();
-}
-
 bool USRPInputGUI::handleMessage(const Message& message)
 {
     if (USRPInput::MsgConfigureUSRP::match(message))

plugins/samplesource/usrpinput/usrpinputgui.h

@@ -51,9 +51,6 @@ public:
     bool deserialize(const QByteArray& data);
     virtual MessageQueue *getInputMessageQueue() { return &m_inputMessageQueue; }
 
-protected:
-    void resizeEvent(QResizeEvent* size);
-
 private:
     Ui::USRPInputGUI* ui;