Widget callbacks¶

A signal will be emitted when an event occurs on a widget.
To run any actions when a signal is emitted, you should define a callback, a function will run these actions.

Here, you can define all callbacks with an one function : _gtkWidgetCB

Its prototype is : fun [ObjGtkWidget u1 u0 I I] ObjGtkWidget

1. ObjGtkWidget : Scol object : the widget
2. u1 : the prototype of the callback (see below)
3. u0 : the user parameter, at your convenience
4. I : the flag of the callback = which signal is affected ? (see below)
5. I : the mask : propagate or not the signal to the container ? Two values are availables
• SCOL_GTK_SIGNAL_MASK_PROPAGATE
• SCOL_GTK_SIGNAL_MASK_STOP

Warning : the prototype of the callback is different for each flag !

Flag currently availables :

SCOL_GTK_WIDGET_BUTTONPRESSED¶

a mouse button has been pressed on a widget.
Prototype : fun [ObjGtkWidget u0 I I I [I I]] u2

1. the widget¶

2. the user parameter¶

3. the type of signal :¶

• SCOL_GTK_EVENT_BUTTON_PRESSED (one click),
• SCOL_GTK_EVENT_BUTTON_PRESSED2 (double click),
• SCOL_GTK_EVENT_BUTTON_PRESSED3 (triple click),
• SCOL_GTK_EVENT_BUTTON_RELEASE (button released).
  So you can make one function to several definitions

4. The mouse button :¶

• SCOL_GTK_EVENT_BUTTON_1,
• SCOL_GTK_EVENT_BUTTON_2,
• SCOL_GTK_EVENT_BUTTON_3,
• SCOL_GTK_EVENT_BUTTON_4,
• SCOL_GTK_EVENT_BUTTON_5

5. The mask of the modifier keys¶

• SCOL_GTK_EVENT_KEY_SHIFT,
• SCOL_GTK_EVENT_KEY_CONTROL,
• SCOL_GTK_EVENT_KEY_ALT,
• SCOL_GTK_EVENT_KEY_CAPS,
• SCOL_GTK_EVENT_KEY_HYPER,
• SCOL_GTK_EVENT_KEY_SUPER,
• SCOL_GTK_EVENT_KEY_OTHER (or nothing)

6. the position of the click [x y], relative to the widget¶

Return Widgets