Qtcreator load custom widget plugin failed

[Anqi]

Hi:
I'm new to qt, I create a qt custom widget.In the slot function i init a QSerialPortInfo .
like this: QSerialPortInfo info(ui->serialPortInfoListBox->itemText(idx));
the qtcreator can't load this custom widget plugin if this code in any slot function . when i marked this line the qtcreator can load the plugin successfully.

• when load the custom widget plugin, every slot function will be called?
• calss QSerialPortInfo can't be init in custom widget plugin?
  Thanks!

[SGaist]

Hi and welcome to devnet,

What platform are you developing on ?
What version of Qt Creator are you using ?
What version of Qt are you using for that plugin?
Did you build Qt Creator yourself ?

[mrjj]

@Anqi
Adding to @SGaist

• when load the custom widget plugin, every slot function will be called?
  No. Creator/Desiner calls the QDesignerCustomWidgetInterface meta functions
  bool isContainer() const override;
  bool isInitialized() const override;
  QIcon icon() const override;
  QString domXml() const override;
  QString group() const override;
  QString includeFile() const override;
  QString name() const override;
  QString toolTip() const override;

but unless you hooked your slots up to some signals that triggers during load,
it wont call any slots as such.

• class QSerialPortInfo can't be init in custom widget plugin?
  You can use any class as you normally would.
  No restriction as such.