PyDMSpinbox

class pydm.widgets.spinbox.PyDMSpinbox(parent=None, init_channel=None)[source]

A QDoubleSpinBox with support for Channels and more from PyDM.

Parameters

  • parent (QWidget) – The parent widget for the Label

  • init_channel (str, optional) – The channel to be used by the widget.

ctrl_limit_changed(which, new_limit)[source]

Callback invoked when the Channel receives new control limit values.

Parameters

  • which (str) – Which control limit was changed. “UPPER” or “LOWER”

  • new_limit (float) – New value for the control limit

keyPressEvent(ev)[source]

Method invoked when a key press event happens on the QDoubleSpinBox.

For PyDMSpinBox we are interested on the Keypress events for:

  • CTRL + Left/Right : Increase or Decrease the step exponent;

  • Up / Down : Add or Remove singleStep units to the value;

  • PageUp / PageDown : Add or Remove 10 times singleStep units to the value;

  • Return or Enter : Send the value to the channel using the send_value_signal.

Parameters

ev (QEvent) –

precision_changed(new_precision)[source]

Callback invoked when the Channel has new precision value. This callback also triggers an update_format_string call so the new precision value is considered.

Parameters

new_precison (int or float) – The new precision value

send_value()[source]

Method invoked to send the current value on the QDoubleSpinBox to the channel using the send_value_signal.

showStepExponent

Whether to show or not the step exponent

Returns

Return type

bool

update_format_string()[source]

Reconstruct the format string to be used when representing the output value.

Returns

Return type

None

update_step_size()[source]

Update the Single Step size on the QDoubleSpinBox.

value_changed(new_val)[source]

Callback invoked when the Channel value is changed.

Parameters

new_val (int or float) – The new value from the channel.

widget_ctx_menu()[source]

Fetch the Widget specific context menu which will be populated with additional tools by assemble_tools_menu.

Returns

If the return of this method is None a new QMenu will be created by assemble_tools_menu.

Return type

QMenu or None