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/bladerf2input/bladerf2inputgui.cpp

@@ -18,7 +18,6 @@
 #include <QDebug>
 #include <QMessageBox>
 #include <QFileDialog>
-#include <QResizeEvent>
 
 #include <libbladeRF.h>
 
@@ -52,7 +51,7 @@ BladeRF2InputGui::BladeRF2InputGui(DeviceUISet *deviceUISet, QWidget* parent) :
     uint64_t f_min, f_max;
 
     ui->setupUi(getContents());
-    setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    sizeToContents();
     getContents()->setStyleSheet("#Bladerf2InputGui { background-color: rgb(64, 64, 64); }");
     m_helpURL = "plugins/samplesource/bladerf2input/readme.md";
 
@@ -140,12 +139,6 @@ bool BladeRF2InputGui::deserialize(const QByteArray& data)
     }
 }
 
-void BladeRF2InputGui::resizeEvent(QResizeEvent* size)
-{
-    adjustSize();
-    size->accept();
-}
-
 void BladeRF2InputGui::updateFrequencyLimits()
 {
     // values in kHz