Adjust dialog size based on protocol selection in DataStreamZMQ

plotjuggler_base/include/PlotJuggler/dialog_utils.h

@@ -0,0 +1,47 @@
+#ifndef PJ_DIALOG_UTILS_H
+#define PJ_DIALOG_UTILS_H
+
+#include <QDialog>
+#include <set>
+
+namespace PJ
+{
+
+/**
+ * @brief Adjusts dialog size to fit contents after widget visibility changes
+ *
+ * This function resets dialog size constraints and forces the layout system
+ * to recalculate the optimal size. Useful when showing/hiding option widgets
+ * in plugin dialogs.
+ *
+ * @param dialog The dialog to resize
+ */
+inline void adjustDialogToContent(QDialog* dialog, const QString& selected_protocol)
+{
+  if (!dialog)
+  {
+    return;
+  }
+  // Reset minimum height and resize dialog
+  dialog->setMinimumHeight(0);
+  dialog->layout()->invalidate();
+  dialog->layout()->activate();
+
+  QSize hint;
+  if (std::set<QString>{ "ros1msg", "ros2msg", "data_tamer", "Influx (Line protocol)" }.count(
+          selected_protocol))
+  {
+    hint = QSize(316, 386);
+  }
+  else
+  {
+    hint = dialog->sizeHint();
+  }
+  // Force recalculation of size hint
+  dialog->setMaximumHeight(hint.height());
+  dialog->resize(hint);
+}
+
+}  // namespace PJ
+
+#endif  // PJ_DIALOG_UTILS_H

plotjuggler_plugins/DataStreamMQTT/datastream_mqtt.cpp

@@ -1,5 +1,6 @@
 #include "datastream_mqtt.h"
 #include "ui_datastream_mqtt.h"
+#include "PlotJuggler/dialog_utils.h"
 #include <QMessageBox>
 #include <QSettings>
 #include <QDebug>
@@ -137,6 +138,10 @@ void DataStreamMQTT::onComboProtocolChanged(const QString& selected_protocol)
   {
     widget->setVisible(true);
   }
+  _dialog->setMinimumHeight(0);
+  _dialog->layout()->invalidate();
+  _dialog->layout()->activate();
+  _dialog->resize(_dialog->sizeHint());
 }
 
 void DataStreamMQTT::onMessageReceived(const mosquitto_message* message)

plotjuggler_plugins/DataStreamUDP/udp_server.cpp

@@ -29,8 +29,10 @@ THE SOFTWARE.
 #include <chrono>
 #include <QNetworkDatagram>
 #include <QNetworkInterface>
+#include <set>
 
 #include "ui_udp_server.h"
+#include "PlotJuggler/dialog_utils.h"
 
 class UdpServerDialog : public QDialog
 {
@@ -110,7 +112,7 @@ bool UDP_Server::start(QStringList*)
 
   ParserFactoryPlugin::Ptr parser_creator;
 
-  auto onComboChanged = [&](const QString& selected_protocol) {
+  auto onComboChanged = [this, &dialog, &parser_creator](const QString& selected_protocol) {
     if (parser_creator)
     {
       if (auto prev_widget = parser_creator->optionsWidget())
@@ -124,6 +126,7 @@ bool UDP_Server::start(QStringList*)
     {
       widget->setVisible(true);
     }
+    adjustDialogToContent(&dialog, selected_protocol);
   };
 
   connect(dialog.ui->comboBoxProtocol, qOverload<const QString&>(&QComboBox::currentIndexChanged),

plotjuggler_plugins/DataStreamWebsocket/websocket_server.cpp

@@ -29,6 +29,7 @@ THE SOFTWARE.
 #include <chrono>
 
 #include "ui_websocket_server.h"
+#include "PlotJuggler/dialog_utils.h"
 
 class WebsocketDialog : public QDialog
 {
@@ -105,7 +106,7 @@ bool WebsocketServer::start(QStringList*)
   ParserFactoryPlugin::Ptr parser_creator;
 
   connect(dialog->ui->comboBoxProtocol, qOverload<const QString&>(&QComboBox::currentIndexChanged),
-          this, [&](const QString& selected_protocol) {
+          this, [this, dialog, &parser_creator](const QString& selected_protocol) {
             if (parser_creator)
             {
               if (auto prev_widget = parser_creator->optionsWidget())
@@ -119,6 +120,8 @@ bool WebsocketServer::start(QStringList*)
             {
               widget->setVisible(true);
             }
+
+            adjustDialogToContent(dialog, selected_protocol);
           });
 
   dialog->ui->comboBoxProtocol->setCurrentText(protocol);

plotjuggler_plugins/DataStreamZMQ/datastream_zmq.cpp

@@ -2,6 +2,7 @@
 #include "ui_datastream_zmq.h"
 
 #include "PlotJuggler/messageparser_base.h"
+#include "PlotJuggler/dialog_utils.h"
 #include <QDebug>
 #include <QDialog>
 #include <QIntValidator>
@@ -106,7 +107,7 @@ bool DataStreamZMQ::start(QStringList*)
   dialog->ui->lineEditTopics->setText(topics);
 
   connect(dialog->ui->comboBoxProtocol, qOverload<const QString&>(&QComboBox::currentIndexChanged),
-          this, [&](const QString& selected_protocol) {
+          this, [this, dialog](const QString& selected_protocol) {
             if (_parser_creator)
             {
               if (auto prev_widget = _parser_creator->optionsWidget())
@@ -120,6 +121,8 @@ bool DataStreamZMQ::start(QStringList*)
             {
               widget->setVisible(true);
             }
+
+            adjustDialogToContent(dialog, selected_protocol);
           });
 
   dialog->ui->comboBoxProtocol->setCurrentText(protocol);