Libwnck Reference Manual: WnckTasklist

## WnckTasklist WnckTasklist — a tasklist widget, showing the list of windows as a list of buttons. |

## Stability Level

Unstable, unless otherwise indicated

## Functions

GtkWidget * | wnck_tasklist_new ()
void | wnck_tasklist_set_grouping ()
void | wnck_tasklist_set_grouping_limit ()
void | wnck_tasklist_set_include_all_workspaces ()
void | wnck_tasklist_set_switch_workspace_on_unminimize ()
void | wnck_tasklist_set_button_relief ()
GdkPixbuf * | (*WnckLoadIconFunction) ()
void | wnck_tasklist_set_icon_loader ()
const int * | wnck_tasklist_get_size_hint_list ()

## Style Properties

gfloat | fade-loop-time | Read
gint | fade-max-loops | Read
gfloat | fade-opacity | Read
gboolean | fade-overlay-rect | Read

## Types and Values

struct | WnckTasklist
enum | WnckTasklistGroupingType

## Object Hierarchy

        GObject
        ╰── GInitiallyUnowned
            ╰── GtkWidget
                ╰── GtkContainer
                    ╰── WnckTasklist

## Implemented Interfaces

WnckTasklist implements AtkImplementorIface and GtkBuildable.

## Includes

    #include <libwnck/libwnck.h>

## Description

The WnckTasklist represents client windows on a screen as a list of buttons labelled with the window titles and icons. Pressing a button can activate or minimize the represented window, and other typical actions are available through a popup menu. Windows needing attention can also be distinguished by a fade effect on the buttons representing them, to help attract the user's attention.

The behavior of the WnckTasklist can be customized in various ways, like grouping multiple windows of the same application in one button (see `wnck_tasklist_set_grouping()` and `wnck_tasklist_set_grouping_limit()`), or showing windows from all workspaces (see `wnck_tasklist_set_include_all_workspaces()`). The fade effect for windows needing attention can be controlled by various style properties like “fade-max-loops” and “fade-opacity”.

The tasklist also acts as iconification destination. If there are multiple WnckTasklist or other applications setting the iconification destination for windows, the iconification destinations might not be consistent among windows and it is not possible to determine which WnckTasklist (or which other application) owns this propriety.

## Functions

### wnck_tasklist_new ()

    GtkWidget *
    wnck_tasklist_new (void);

Creates a new WnckTasklist. The WnckTasklist will list WnckWindow of the WnckScreen it is on.

#### Returns

a newly created WnckTasklist.

### wnck_tasklist_set_grouping ()

    void
    wnck_tasklist_set_grouping (WnckTasklist *tasklist,
                                WnckTasklistGroupingType grouping);

Sets the grouping policy for `tasklist` to `grouping` .

#### Parameters

tasklist | a WnckTasklist. |
grouping | a grouping policy. |

### wnck_tasklist_set_grouping_limit ()

    void
    wnck_tasklist_set_grouping_limit (WnckTasklist *tasklist,
                                      gint limit);

Sets the maximum size of buttons in `tasklist` before `tasklist` tries to group WnckWindow in the same WnckApplication in only one button. This limit is valid only when the grouping policy of `tasklist` is `WNCK_TASKLIST_AUTO_GROUP`.

#### Parameters

tasklist | a WnckTasklist. |
limit | a size in pixels. |

### wnck_tasklist_set_include_all_workspaces ()

    void
    wnck_tasklist_set_include_all_workspaces
                                   (WnckTasklist *tasklist,
                                    gboolean include_all_workspaces);

Sets `tasklist` to display WnckWindow from all WnckWorkspace or not, according to `include_all_workspaces` .

Note that if the active WnckWorkspace has a viewport and if `include_all_workspaces` is `FALSE`, then only the WnckWindow visible in the viewport are displayed in `tasklist` . The rationale for this is that the viewport is generally used to implement workspace-like behavior. A side-effect of this is that, when using multiple WnckWorkspace with viewport, it is not possible to show all WnckWindow from a WnckWorkspace (even those that are not visible in the viewport) in `tasklist` without showing all WnckWindow from all WnckWorkspace.

#### Parameters

tasklist | a WnckTasklist. |
include_all_workspaces | whether to display WnckWindow from all WnckWorkspace in `tasklist` . |

### wnck_tasklist_set_switch_workspace_on_unminimize ()

    void
    wnck_tasklist_set_switch_workspace_on_unminimize
                                   (WnckTasklist *tasklist,
                                    gboolean switch_workspace_on_unminimize);

Sets `tasklist` to activate or not the WnckWorkspace a WnckWindow is on when unminimizing it, according to `switch_workspace_on_unminimize` .

FIXME: does it still work?

#### Parameters

tasklist | a WnckTasklist. |
switch_workspace_on_unminimize | whether to activate the WnckWorkspace a WnckWindow is on when unminimizing it. |

### wnck_tasklist_set_button_relief ()

    void
    wnck_tasklist_set_button_relief (WnckTasklist *tasklist,
                                     GtkReliefStyle relief);

Sets the relief type of the buttons in `tasklist` to `relief` . The main use of this function is proper integration of WnckTasklist in panels with non-system backgrounds.

#### Parameters

tasklist | a WnckTasklist. |
relief | a relief type. |

Since 2.12

### WnckLoadIconFunction ()

    GdkPixbuf *
    (*WnckLoadIconFunction) (const char *icon_name,
                             int size,
                             unsigned int flags,
                             void *data);

Specifies the type of function passed to `wnck_tasklist_set_icon_loader()`.

#### Parameters

icon_name | an icon name as in the Icon field in a .desktop file for the icon to load. |
size | the desired icon size. |
flags | not defined to do anything yet. |
data | data passed to the function, set when the WnckLoadIconFunction has been set for the WnckTasklist. |

#### Returns

it should return a `GdkPixbuf` of `icon_name` at size `size` , or `NULL` if no icon for `icon_name` at size `size` could be loaded.

Since 2.2

### wnck_tasklist_set_icon_loader ()

    void
    wnck_tasklist_set_icon_loader (WnckTasklist *tasklist,
                                   WnckLoadIconFunction load_icon_func,
                                   void *data,
                                   GDestroyNotify free_data_func);

Sets a function to be used for loading icons.

#### Parameters

tasklist | a WnckTasklist |
load_icon_func | icon loader function |
data | data for icon loader function |
free_data_func | function to free the data |

Since 2.2

### wnck_tasklist_get_size_hint_list ()

    const int *
    wnck_tasklist_get_size_hint_list (WnckTasklist *tasklist,
                                      int *n_elements);

Since a WnckTasklist does not have a fixed size (WnckWindow can be grouped when needed, for example), the standard size request mechanism in GTK+ is not enough to announce what sizes can be used by `tasklist` . The size hints mechanism is a solution for this. See `panel_applet_set_size_hints()` for more information.

#### Parameters

tasklist | a WnckTasklist. |
n_elements | return location for the number of elements in the array returned by this function. This number should always be pair. |

#### Returns

a list of size hints that can be used to allocate an appropriate size for `tasklist` .

## Types and Values

### struct WnckTasklist

    struct WnckTasklist;

The WnckTasklist struct contains only private fields and should not be directly accessed.

### enum WnckTasklistGroupingType

Type defining the policy of the WnckTasklist for grouping multiple WnckWindow of the same WnckApplication.

#### Members

WNCK_TASKLIST_NEVER_GROUP | never group multiple WnckWindow of the same WnckApplication. |
WNCK_TASKLIST_AUTO_GROUP | group multiple WnckWindow of the same WnckApplication for some WnckApplication, when there is not enough place to have a good-looking list of all WnckWindow. |
WNCK_TASKLIST_ALWAYS_GROUP | always group multiple WnckWindow of the same WnckApplication, for all WnckApplication. |

## Style Property Details

### The `“fade-loop-time”` style property

      “fade-loop-time”           gfloat

When a window needs attention, a fade effect is drawn on the button representing the window. This property controls the time one loop of this fade effect takes, in seconds.

Flags: Read

Allowed values: [0.2,10]

Default value: 3

Since 2.16

### The `“fade-max-loops”` style property

      “fade-max-loops”           gint

When a window needs attention, a fade effect is drawn on the button representing the window. This property controls the number of loops for this fade effect. 0 means the button will only fade to the final color.

Flags: Read

Allowed values: [0,50]

Default value: 5

Since 2.20

### The `“fade-opacity”` style property

      “fade-opacity”             gfloat

When a window needs attention, a fade effect is drawn on the button representing the window. This property controls the final opacity that will be reached by the fade effect.

Flags: Read

Allowed values: [0,1]

Default value: 0.8

Since 2.16

### The `“fade-overlay-rect”` style property

      “fade-overlay-rect”        gboolean

When a window needs attention, a fade effect is drawn on the button representing the window. Set this property to `TRUE` to enable a compatibility mode for pixbuf engine themes that cannot react to color changes. If enabled, a rectangle with the correct color will be drawn on top of the button.

Flags: Read

Default value: TRUE

Since 2.16

## See Also

WnckScreen, WnckSelector