Scol » Lib2D GTK

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 (u1) is different for each flag !

Flags 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 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. *type*|I|the keyis pressed or released|0 if pressed, 1 if released, nil if not known, error, etc|

|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 è, 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|In *Gtk+ 2.x*, the string is always "unknown" and the integer is always SCOL_DEVICE_UNKNOWN|

| | | |SCOL_DEVICE_MOUSE,|

| | | |SCOL_DEVICE_PEN,|

| | | |SCOL_DEVICE_ERASER,|

| | | |SCOL_DEVICE_CURSOR,|

| | | |SCOL_DEVICE_KEYBOARD,|

| | | |SCOL_DEVICE_UNKNOWN|

h2. SCOL_GTK_WIDGET_SCROLL

when the whell mouse turns and or is pressed

Prototype : *fun [ObjGtkWidget u0 I I [I I] [S I]] u2*

table

|1. *widget*|ObjGtkWidget|a widget| |

|2. *userparam*|u0|a user parameter, at your convenience| |

|3. *direction*|I|the direction|SCOL_GTK_EVENT_SCROLL_UP|

| | | |SCOL_GTK_EVENT_SCROLL_DOWN|

| | | |SCOL_GTK_EVENT_SCROLL_LEFT|

| | | |SCOL_GTK_EVENT_SCROLL_RIGHT|

| | | |SCOL_GTK_EVENT_SCROLL_UNKNOWN|

|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. *coord*|[I I]|x and y coordinates| |

|6. *device*|[S I]|the name of the device and the type of the device|In *Gtk+ 2.x*, the string is always "unknown" and the integer is always SCOL_DEVICE_UNKNOWN|

| | | |SCOL_DEVICE_MOUSE,|

| | | |SCOL_DEVICE_PEN,|

| | | |SCOL_DEVICE_ERASER,|

| | | |SCOL_DEVICE_CURSOR,|

| | | |SCOL_DEVICE_KEYBOARD,|

| | | |SCOL_DEVICE_UNKNOWN|

h2. SCOL_GTK_WIDGET_VALUE_CHANGED

When the value of several widgets changes. These widgets are the [[Range]] widget, Spin widgets, ...

Prototype : *fun [ObjGtkWidget u0 F] u2*

The supplemental argument is the new value displayed by the widget.

h1. Window only

h2. SCOL_GTK_WINDOW_STATE

when the state of a window changes.

Prototype : *fun [ObjGtkWidget u0 I] u2*

table

|1. *widget*|ObjGtkWidget|a widget|Warning : widget *must* be a window (GtkWindow, see "_gtkWidgetTypeName":http://trac.scolring.org/projects/lib2dgtk/wiki/Widgets)|

|2. *userparam*|u0|a user parameter, at your convenience| |

|3. *state*|I|what flags have changed ?|SCOL_WINDOW_NOTSHOWN the window is not shown|

| | | |SCOL_WINDOW_ICONIFIED the window is minimized|

| | | |SCOL_WINDOW_MAXIMIZED the window is maximized|

| | | |SCOL_WINDOW_STICKY the window is sticky|

| | | |SCOL_WINDOW_FULLSCREEN the window is maximized without decorations|

| | | |SCOL_WINDOW_ABOVE the window is kept above other windows|

| | | |SCOL_WINDOW_BELOW the window is kept below other windows|

| | | |SCOL_WINDOW_STATE_UNKNOWN the state is unknown|

h1. Button only

h2. SCOL_GTK_BUTTON_CLICKED

A button has been clicked

Prototype : *fun [ObjGtkWidget u0] u2*

Warning : widget *must* be a button (GtkButton, see "_gtkWidgetTypeName":http://trac.scolring.org/projects/lib2dgtk/wiki/Widgets)

h1. Notebook only

h2. SCOL_GTK_NOTEBOOK_CHANGE

when the user or a function changes the current tab/page.

Prototype : *fun [ObjGtkWidget u0 I] u2*

The supplemental argument is the index of the new current tab

h1. TextBuffer only

h2. SCOL_GTK_TEXTBUFFER_CHANGED

when the content of a text buffer object change.

Prototype : *fun [ObjGtkWidget u0] u2*

h2. SCOL_GTK_TEXTBUFFER_MODIFIED

when the text buffer has been modified by the user or by the program. To set/get this state, see _gtkTextBufferIsModified

Prototype : *fun [ObjGtkWidget u0] u2*

Return [[Widgets]]