Widget callbacks » History » Revision 15
Revision 14 (iri, 03/02/2011 12:11 AM) → Revision 15/26 (iri, 03/02/2011 12:29 AM)
h1. 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*
# *ObjGtkWidget* : Scol object : the widget
# *u1* : the prototype of the callback (see below)
# *u0* : the user parameter, at your convenience
# *I* : the flag of the callback = which signal is affected ? (see below)
# *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 :
{{toc}}
h1. Any widgets
h2. SCOL_GTK_WIDGET_BUTTONPRESSED
a mouse button has been pressed on a widget.
Prototype : *fun [ObjGtkWidget u0 I I I [I I]] u2*
table
|1. *widget*|ObjGtkWidget|a widget| |
|2. *userparam*|u0|a user parameter, at your convenience| |
|3. *signal*|I|the type of the 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. *button*|I|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. *mask*|I|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 (can not work : system, window manager, ...)|
| | | |SCOL_GTK_EVENT_KEY_HYPER (can not work : system, window manager, ...)|
| | | |SCOL_GTK_EVENT_KEY_SUPER (can not work : system, window manager, ...)|
| | | |SCOL_GTK_EVENT_KEY_OTHER (or nothing)|
|6. *position*|I|the position of the click [x y], relative to the widget| |
Note : sometimes, it is better to use the flag "SCOL_GTK_BUTTON_CLICKED":http://trac.scolring.org/projects/lib2dgtk/wiki/Widget_callbacks#SCOL_GTK_BUTTON_CLICKED. For example, to grab the signal of a mnemonic button, SCOL_GTK_BUTTON_CLICKED should be used (but the callback give less informations).
h2. SCOL_GTK_WIDGET_BUTTONRELEASED
a mouse button has been released on a widget.
Prototype : *fun [ObjGtkWidget u0 I I I [I I]] u2*
Note : sometimes, it is better to use the flag "SCOL_GTK_BUTTON_CLICKED":http://trac.scolring.org/projects/lib2dgtk/wiki/Widget_callbacks#SCOL_GTK_BUTTON_CLICKED. For example, to grab the signal of a mnemonic button, SCOL_GTK_BUTTON_CLICKED should be used (but the callback give less informations).
See 'SCOL_GTK_WIDGET_BUTTONPRESSED' above.
h2. SCOL_GTK_WIDGET_MOVERESIZE
a window has moved and/or resized.
Prototype : *fun [ObjGtkWidget u0 [I I] [I I]] u2*
The supplementals parameters are two tuples :
# is the new position (x and y, relative at its parents or at the screen)
# is the new size (width and height)
h2. SCOL_GTK_WIDGET_DESTROY
when a widget (typically a window or all top level container) is destroyed (all reference are destroyed).
Prototype : *fun [ObjGtkWidget u0] u2*
h2. SCOL_GTK_WIDGET_ENTERLEAVE
when the pointer (typically a mouse) enter or leave a window (maybe an other object)
Prototype : *fun [ObjGtkWidget u0 I I I [I I]] u2*
The supplementals arguments are :
table
|1. *widget*|ObjGtkWidget|a widget (typically a window)| |
|2. *userparam*|u0|a user parameter, at your convenience| |
|3 *type*|I|the pointer enters or leaves|0 if enters, 1 if leaves|
|4 *mask*|I|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 (can not work : system, window manager, ...)|
| | | |SCOL_GTK_EVENT_KEY_HYPER (can not work : system, window manager, ...)|
| | | |SCOL_GTK_EVENT_KEY_SUPER (can not work : system, window manager, ...)|
| | | |SCOL_GTK_EVENT_KEY_OTHER (or nothing)|
|5 *focus*|I|the widget has (or not) the focus|1 if is the focus window or an inferior|
|6 *coord*|[I I]|the coordinate of the pointer (x, y)|
h2. SCOL_GTK_WIDGET_KEYB_FOCUS
when the keyboard focus enters or leaves a widget.
Prototype : *fun [ObjGtkWidget u0 I] u2*
The supplemental parameter is :
*in* : I : 1 if enter, 0 if lost
h2. SCOL_GTK_WIDGET_SHOW
when a widget is shown
Prototype : *fun [ObjGtkWidget u0] u2*
h2. SCOL_GTK_WIDGET_HIDE
when a widget is hidden
Prototype : *fun [ObjGtkWidget u0] u2*
h2. SCOL_GTK_WIDGET_KEY
when a key is pressed or released
Prototype : *fun [ObjGtkWidget u0 I I I S] u2*
table
|1. *widget*|ObjGtkWidget|a widget| |
|2. *userparam*|u0|a user parameter, at your convenience| |
|3. |3 *type*|I|the keyis pressed or released|0 if pressed, 1 if released, nil if not known, error, etc|
|4. |4 *mask*|I|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 (can not work : system, window manager, ...)|
| | | |SCOL_GTK_EVENT_KEY_HYPER (can not work : system, window manager, ...)|
| | | |SCOL_GTK_EVENT_KEY_SUPER (can not work : system, window manager, ...)|
| | | |SCOL_GTK_EVENT_KEY_OTHER (or nothing)|
|5 *keyval*|I|the value of the key||
|6 *keystring*|S|the string (e.g. if keyval = 65, keystring = "A").|But, be careful, if the key is the left shift, keystring should be "SHIFT_L", or, in french, with the key รจ, keystring = "egrave", ... This last argument is a facility only.|
h2. SCOL_GTK_WIDGET_MOTION
when the pointer moves over a widget
Prototype : *fun [ObjGtkWidget u0 I [I I] [I I] [S I]] u2*
table
|1. *widget*|ObjGtkWidget|a widget| |
|2. *userparam*|u0|a user parameter, at your convenience| |
|3. *mask*|I|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 (can not work : system, window manager, ...)|
| | | |SCOL_GTK_EVENT_KEY_HYPER (can not work : system, window manager, ...)|
| | | |SCOL_GTK_EVENT_KEY_SUPER (can not work : system, window manager, ...)|
| | | |SCOL_GTK_EVENT_KEY_OTHER (or nothing)|
|4. *coord*|[I I]|x and y coordinates| |
|5. *coorddevice*|[I I]|x, y translated to the axes of device, or nil if device is the mouse| |
|6. *device*|[S I]|the name of the device and the type of the device| |
h1. Any button
h2. SCOL_GTK_BUTTON_CLICKED
A button has been clicked
Prototype : *fun [ObjGtkWidget u0] u2*
Return [[Widgets]]