GimpChainButton

Name

GimpChainButton -- Widget to visually connect two entry widgets.

Synopsis



enum        GimpChainPosition;
GtkWidget*  gimp_chain_button_new           (GimpChainPosition position);
void        gimp_chain_button_set_active    (GimpChainButton *gcb,
                                             gboolean active);
gboolean    gimp_chain_button_get_active    (GimpChainButton *gcb);

Object Hierarchy


  GObject
   +----GtkObject
         +----GtkWidget
               +----GtkContainer
                     +----GtkTable
                           +----GimpChainButton

Signal Prototypes


"toggled"   void        user_function      (GimpChainButton *gimpchainbutton,
                                            gpointer user_data);

Description

This widget provides a button showing either a linked or a broken chain that can be used to link two entries, spinbuttons, colors or other GUI elements and show that they may be locked. Use it for example to connect X and Y ratios to provide the possibility of a constrained aspect ratio.

The GimpChainButton only gives visual feedback, it does not really connect widgets. You have to take care of locking the values yourself by checking the state of the GimpChainButton whenever a value changes in one of the connected widgets and adjusting the other value if necessary.

Details

enum GimpChainPosition

typedef enum
{
  GIMP_CHAIN_TOP,
  GIMP_CHAIN_LEFT,
  GIMP_CHAIN_BOTTOM,
  GIMP_CHAIN_RIGHT
} GimpChainPosition;


gimp_chain_button_new ()

GtkWidget*  gimp_chain_button_new           (GimpChainPosition position);

Creates a new GimpChainButton widget.

This returns a button showing either a broken or a linked chain and small clamps attached to both sides that visually group the two widgets you want to connect. This widget looks best when attached to a table taking up two columns (or rows respectively) next to the widgets that it is supposed to connect. It may work for more than two widgets, but the look is optimized for two.


gimp_chain_button_set_active ()

void        gimp_chain_button_set_active    (GimpChainButton *gcb,
                                             gboolean active);

Sets the state of the GimpChainButton to be either locked (TRUE) or unlocked (FALSE) and changes the showed pixmap to reflect the new state.


gimp_chain_button_get_active ()

gboolean    gimp_chain_button_get_active    (GimpChainButton *gcb);

Checks the state of the GimpChainButton.

Signals

The "toggled" signal

void        user_function                  (GimpChainButton *gimpchainbutton,
                                            gpointer user_data);

See Also

You may want to use the convenience function gimp_coordinates_new() to set up two GimpSizeEntries (see GimpSizeEntry) linked with a GimpChainButton.