/* GTK - The GIMP Toolkit * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the Free * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef __GTK_WIDGET_H__ #define __GTK_WIDGET_H__ #include #include #include #include #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ /* The flags that are used by GtkWidget on top of the * flags field of GtkObject. */ enum { GTK_TOPLEVEL = 1 << 4, GTK_NO_WINDOW = 1 << 5, GTK_REALIZED = 1 << 6, GTK_MAPPED = 1 << 7, GTK_VISIBLE = 1 << 8, GTK_SENSITIVE = 1 << 9, GTK_PARENT_SENSITIVE = 1 << 10, GTK_CAN_FOCUS = 1 << 11, GTK_HAS_FOCUS = 1 << 12, GTK_CAN_DEFAULT = 1 << 13, GTK_HAS_DEFAULT = 1 << 14, GTK_HAS_GRAB = 1 << 15, GTK_BASIC = 1 << 16, GTK_RESERVED_3 = 1 << 17, GTK_RC_STYLE = 1 << 18 }; /* Macro for casting a pointer to a GtkWidget pointer. */ #define GTK_WIDGET(wid) GTK_CHECK_CAST ((wid), gtk_widget_get_type (), GtkWidget) /* Macro for casting the klass field of a widget to a GtkWidgetClass pointer. */ #define GTK_WIDGET_CLASS(klass) GTK_CHECK_CLASS_CAST ((klass), gtk_widget_get_type (), GtkWidgetClass) /* Macros for extracting various fields from GtkWidget and GtkWidgetClass. */ #define GTK_WIDGET_TYPE(wid) (GTK_OBJECT_TYPE (wid)) #define GTK_WIDGET_STATE(wid) (GTK_WIDGET (wid)->state) #define GTK_WIDGET_SAVED_STATE(wid) (GTK_WIDGET (wid)->saved_state) /* Macros for extracting the widget flags from GtkWidget. */ #define GTK_WIDGET_FLAGS(wid) (GTK_OBJECT_FLAGS (wid)) #define GTK_WIDGET_TOPLEVEL(wid) (GTK_WIDGET_FLAGS (wid) & GTK_TOPLEVEL) #define GTK_WIDGET_NO_WINDOW(wid) (GTK_WIDGET_FLAGS (wid) & GTK_NO_WINDOW) #define GTK_WIDGET_REALIZED(wid) (GTK_WIDGET_FLAGS (wid) & GTK_REALIZED) #define GTK_WIDGET_MAPPED(wid) (GTK_WIDGET_FLAGS (wid) & GTK_MAPPED) #define GTK_WIDGET_VISIBLE(wid) (GTK_WIDGET_FLAGS (wid) & GTK_VISIBLE) #define GTK_WIDGET_DRAWABLE(wid) (GTK_WIDGET_VISIBLE (wid) && GTK_WIDGET_MAPPED (wid)) #define GTK_WIDGET_SENSITIVE(wid) (GTK_WIDGET_FLAGS (wid) & GTK_SENSITIVE) #define GTK_WIDGET_PARENT_SENSITIVE(wid) (GTK_WIDGET_FLAGS (wid) & GTK_PARENT_SENSITIVE) #define GTK_WIDGET_IS_SENSITIVE(wid) ((GTK_WIDGET_SENSITIVE (wid) && \ GTK_WIDGET_PARENT_SENSITIVE (wid)) != 0) #define GTK_WIDGET_CAN_FOCUS(wid) (GTK_WIDGET_FLAGS (wid) & GTK_CAN_FOCUS) #define GTK_WIDGET_HAS_FOCUS(wid) (GTK_WIDGET_FLAGS (wid) & GTK_HAS_FOCUS) #define GTK_WIDGET_CAN_DEFAULT(wid) (GTK_WIDGET_FLAGS (wid) & GTK_CAN_DEFAULT) #define GTK_WIDGET_HAS_DEFAULT(wid) (GTK_WIDGET_FLAGS (wid) & GTK_HAS_DEFAULT) #define GTK_WIDGET_HAS_GRAB(wid) (GTK_WIDGET_FLAGS (wid) & GTK_HAS_GRAB) #define GTK_WIDGET_BASIC(wid) (GTK_WIDGET_FLAGS (wid) & GTK_BASIC) #define GTK_WIDGET_RC_STYLE(wid) (GTK_WIDGET_FLAGS (wid) & GTK_RC_STYLE) /* Macros for setting and clearing widget flags. */ #define GTK_WIDGET_SET_FLAGS(wid,flag) G_STMT_START{ (GTK_WIDGET_FLAGS (wid) |= (flag)); }G_STMT_END #define GTK_WIDGET_UNSET_FLAGS(wid,flag) G_STMT_START{ (GTK_WIDGET_FLAGS (wid) &= ~(flag)); }G_STMT_END /* Macros for testing whether "wid" is of type GtkWidget. */ #define GTK_IS_WIDGET(wid) GTK_CHECK_TYPE ((wid), GTK_TYPE_WIDGET) #define GTK_TYPE_WIDGET (gtk_widget_get_type ()) typedef struct _GtkRequisition GtkRequisition; typedef struct _GtkAllocation GtkAllocation; typedef struct _GtkSelectionData GtkSelectionData; typedef struct _GtkWidget GtkWidget; typedef struct _GtkWidgetClass GtkWidgetClass; typedef struct _GtkWidgetAuxInfo GtkWidgetAuxInfo; typedef struct _GtkWidgetShapeInfo GtkWidgetShapeInfo; typedef void (*GtkCallback) (GtkWidget *widget, gpointer data); /* A requisition is a desired amount of space which a * widget may request. */ struct _GtkRequisition { guint16 width; guint16 height; }; /* An allocation is a size and position. Where a widget * can ask for a desired size, it is actually given * this amount of space at the specified position. */ struct _GtkAllocation { gint16 x; gint16 y; guint16 width; guint16 height; }; /* The contents of a selection are returned in a GtkSelectionData structure. selection/target identify the request. type specifies the type of the return; if length < 0, and the data should be ignored. This structure has object semantics - no fields should be modified directly, they should not be created directly, and pointers to them should not be stored beyond the duration of a callback. (If the last is changed, we'll need to add reference counting) */ struct _GtkSelectionData { GdkAtom selection; GdkAtom target; GdkAtom type; gint format; guchar *data; gint length; }; /* The widget is the base of the tree for displayable objects. * (A displayable object is one which takes up some amount * of screen real estate). It provides a common base and interface * which actual widgets must adhere to. */ struct _GtkWidget { /* The object structure needs to be the first * element in the widget structure in order for * the object mechanism to work correctly. This * allows a GtkWidget pointer to be cast to a * GtkObject pointer. */ GtkObject object; /* 16 bits of internally used private flags. * this will be packed into the same 4 byte alignment frame that * state and saved_state go. we therefore don't waste any new * space on this. */ guint16 private_flags; /* The state of the widget. There are actually only * 5 widget states (defined in "gtkenums.h"). */ guint8 state; /* The saved state of the widget. When a widgets state * is changed to GTK_STATE_INSENSITIVE via * "gtk_widget_set_state" or "gtk_widget_set_sensitive" * the old state is kept around in this field. The state * will be restored once the widget gets sensitive again. */ guint8 saved_state; /* The widgets name. If the widget does not have a name * (the name is NULL), then its name (as returned by * "gtk_widget_get_name") is its classes name. * Among other things, the widget name is used to determine * the style to use for a widget. */ gchar *name; /* The style for the widget. The style contains the * colors the widget should be drawn in for each state * along with graphics contexts used to draw with and * the font to use for text. */ GtkStyle *style; /* The widgets desired size. */ GtkRequisition requisition; /* The widgets allocated size. */ GtkAllocation allocation; /* The widgets window or its parent window if it does * not have a window. (Which will be indicated by the * GTK_NO_WINDOW flag being set). */ GdkWindow *window; /* The widgets parent. */ GtkWidget *parent; }; struct _GtkWidgetClass { /* The object class structure needs to be the first * element in the widget class structure in order for * the class mechanism to work correctly. This allows a * GtkWidgetClass pointer to be cast to a GtkObjectClass * pointer. */ GtkObjectClass parent_class; /* The signal to emit when an object of this class is activated. * This is used when activating the current focus widget and * the default widget. */ guint activate_signal; /* basics */ void (* show) (GtkWidget *widget); void (* hide) (GtkWidget *widget); void (* show_all) (GtkWidget *widget); void (* hide_all) (GtkWidget *widget); void (* map) (GtkWidget *widget); void (* unmap) (GtkWidget *widget); void (* realize) (GtkWidget *widget); void (* unrealize) (GtkWidget *widget); void (* draw) (GtkWidget *widget, GdkRectangle *area); void (* draw_focus) (GtkWidget *widget); void (* draw_default) (GtkWidget *widget); void (* size_request) (GtkWidget *widget, GtkRequisition *requisition); void (* size_allocate) (GtkWidget *widget, GtkAllocation *allocation); void (* state_changed) (GtkWidget *widget, guint previous_state); void (* parent_set) (GtkWidget *widget, GtkWidget *previous_parent); void (* style_set) (GtkWidget *widget, GtkStyle *previous_style); /* accelerators */ gint (* install_accelerator) (GtkWidget *widget, const gchar *signal_name, gchar key, guint8 modifiers); void (* remove_accelerator) (GtkWidget *widget, const gchar *signal_name); /* events */ gint (* event) (GtkWidget *widget, GdkEvent *event); gint (* button_press_event) (GtkWidget *widget, GdkEventButton *event); gint (* button_release_event) (GtkWidget *widget, GdkEventButton *event); gint (* motion_notify_event) (GtkWidget *widget, GdkEventMotion *event); gint (* delete_event) (GtkWidget *widget, GdkEventAny *event); gint (* destroy_event) (GtkWidget *widget, GdkEventAny *event); gint (* expose_event) (GtkWidget *widget, GdkEventExpose *event); gint (* key_press_event) (GtkWidget *widget, GdkEventKey *event); gint (* key_release_event) (GtkWidget *widget, GdkEventKey *event); gint (* enter_notify_event) (GtkWidget *widget, GdkEventCrossing *event); gint (* leave_notify_event) (GtkWidget *widget, GdkEventCrossing *event); gint (* configure_event) (GtkWidget *widget, GdkEventConfigure *event); gint (* focus_in_event) (GtkWidget *widget, GdkEventFocus *event); gint (* focus_out_event) (GtkWidget *widget, GdkEventFocus *event); gint (* map_event) (GtkWidget *widget, GdkEventAny *event); gint (* unmap_event) (GtkWidget *widget, GdkEventAny *event); gint (* property_notify_event) (GtkWidget *widget, GdkEventProperty *event); gint (* selection_clear_event) (GtkWidget *widget, GdkEventSelection *event); gint (* selection_request_event) (GtkWidget *widget, GdkEventSelection *event); gint (* selection_notify_event) (GtkWidget *widget, GdkEventSelection *event); gint (* proximity_in_event) (GtkWidget *widget, GdkEventProximity *event); gint (* proximity_out_event) (GtkWidget *widget, GdkEventProximity *event); gint (* drag_begin_event) (GtkWidget *widget, GdkEventDragBegin *event); gint (* drag_request_event) (GtkWidget *widget, GdkEventDragRequest *event); gint (* drag_end_event) (GtkWidget *widget, GdkEvent *event); gint (* drop_enter_event) (GtkWidget *widget, GdkEventDropEnter *event); gint (* drop_leave_event) (GtkWidget *widget, GdkEventDropLeave *event); gint (* drop_data_available_event) (GtkWidget *widget, GdkEventDropDataAvailable *event); gint (* other_event) (GtkWidget *widget, GdkEventOther *event); /* selection */ void (* selection_received) (GtkWidget *widget, GtkSelectionData *selection_data); gint (* client_event) (GtkWidget *widget, GdkEventClient *event); gint (* no_expose_event) (GtkWidget *widget, GdkEventAny *event); }; struct _GtkWidgetAuxInfo { gint16 x; gint16 y; guint16 width; guint16 height; }; struct _GtkWidgetShapeInfo { gint16 offset_x; gint16 offset_y; GdkBitmap *shape_mask; }; guint gtk_widget_get_type (void); GtkWidget* gtk_widget_new (guint type, ...); GtkWidget* gtk_widget_newv (guint type, guint nargs, GtkArg *args); void gtk_widget_ref (GtkWidget *widget); void gtk_widget_unref (GtkWidget *widget); void gtk_widget_destroy (GtkWidget *widget); void gtk_widget_destroyed (GtkWidget *widget, GtkWidget **widget_pointer); void gtk_widget_get (GtkWidget *widget, GtkArg *arg); void gtk_widget_getv (GtkWidget *widget, guint nargs, GtkArg *args); void gtk_widget_set (GtkWidget *widget, ...); void gtk_widget_setv (GtkWidget *widget, guint nargs, GtkArg *args); void gtk_widget_unparent (GtkWidget *widget); void gtk_widget_show (GtkWidget *widget); void gtk_widget_hide (GtkWidget *widget); void gtk_widget_show_all (GtkWidget *widget); void gtk_widget_hide_all (GtkWidget *widget); void gtk_widget_map (GtkWidget *widget); void gtk_widget_unmap (GtkWidget *widget); void gtk_widget_realize (GtkWidget *widget); void gtk_widget_unrealize (GtkWidget *widget); void gtk_widget_queue_draw (GtkWidget *widget); void gtk_widget_queue_resize (GtkWidget *widget); void gtk_widget_draw (GtkWidget *widget, GdkRectangle *area); void gtk_widget_draw_focus (GtkWidget *widget); void gtk_widget_draw_default (GtkWidget *widget); void gtk_widget_draw_children (GtkWidget *widget); void gtk_widget_size_request (GtkWidget *widget, GtkRequisition *requisition); void gtk_widget_size_allocate (GtkWidget *widget, GtkAllocation *allocation); void gtk_widget_install_accelerator (GtkWidget *widget, GtkAcceleratorTable *table, const gchar *signal_name, gchar key, guint8 modifiers); void gtk_widget_remove_accelerator (GtkWidget *widget, GtkAcceleratorTable *table, const gchar *signal_name); gint gtk_widget_event (GtkWidget *widget, GdkEvent *event); void gtk_widget_activate (GtkWidget *widget); void gtk_widget_reparent (GtkWidget *widget, GtkWidget *new_parent); void gtk_widget_popup (GtkWidget *widget, gint x, gint y); gint gtk_widget_intersect (GtkWidget *widget, GdkRectangle *area, GdkRectangle *intersection); gint gtk_widget_basic (GtkWidget *widget); void gtk_widget_grab_focus (GtkWidget *widget); void gtk_widget_grab_default (GtkWidget *widget); void gtk_widget_set_name (GtkWidget *widget, const gchar *name); gchar* gtk_widget_get_name (GtkWidget *widget); void gtk_widget_set_state (GtkWidget *widget, GtkStateType state); void gtk_widget_set_sensitive (GtkWidget *widget, gint sensitive); void gtk_widget_set_parent (GtkWidget *widget, GtkWidget *parent); void gtk_widget_set_parent_window (GtkWidget *widget, GdkWindow *parent_window); GdkWindow *gtk_widget_get_parent_window (GtkWidget *widget); void gtk_widget_set_uposition (GtkWidget *widget, gint x, gint y); void gtk_widget_set_usize (GtkWidget *widget, gint width, gint height); void gtk_widget_set_events (GtkWidget *widget, gint events); void gtk_widget_set_extension_events (GtkWidget *widget, GdkExtensionMode mode); GdkExtensionMode gtk_widget_get_extension_events (GtkWidget *widget); GtkWidget* gtk_widget_get_toplevel (GtkWidget *widget); GtkWidget* gtk_widget_get_ancestor (GtkWidget *widget, GtkType widget_type); GdkColormap* gtk_widget_get_colormap (GtkWidget *widget); GdkVisual* gtk_widget_get_visual (GtkWidget *widget); gint gtk_widget_get_events (GtkWidget *widget); void gtk_widget_get_pointer (GtkWidget *widget, gint *x, gint *y); gint gtk_widget_is_ancestor (GtkWidget *widget, GtkWidget *ancestor); gint gtk_widget_is_child (GtkWidget *widget, GtkWidget *child); /* Widget styles. */ void gtk_widget_set_style (GtkWidget *widget, GtkStyle *style); void gtk_widget_set_rc_style (GtkWidget *widget); void gtk_widget_ensure_style (GtkWidget *widget); GtkStyle* gtk_widget_get_style (GtkWidget *widget); void gtk_widget_restore_default_style (GtkWidget *widget); /* Tell other Gtk applications to use the same default colors. */ void gtk_widget_propagate_default_style (void); /* Push/pop pairs, to change default values upon a widget's creation. * This will override the values that got set by the * gtk_widget_set_default_* () functions. */ void gtk_widget_push_style (GtkStyle *style); void gtk_widget_push_colormap (GdkColormap *cmap); void gtk_widget_push_visual (GdkVisual *visual); void gtk_widget_pop_style (void); void gtk_widget_pop_colormap (void); void gtk_widget_pop_visual (void); /* Set certain default values to be used at widget creation time. */ void gtk_widget_set_default_style (GtkStyle *style); void gtk_widget_set_default_colormap (GdkColormap *colormap); void gtk_widget_set_default_visual (GdkVisual *visual); GtkStyle* gtk_widget_get_default_style (void); GdkColormap* gtk_widget_get_default_colormap (void); GdkVisual* gtk_widget_get_default_visual (void); /* Counterpart to gdk_window_shape_combine_mask. */ void gtk_widget_shape_combine_mask (GtkWidget *widget, GdkBitmap *shape_mask, gint offset_x, gint offset_y); /* When you get a drag_enter event, you can use this to tell Gtk of other * items that are to be dragged as well... */ void gtk_widget_dnd_drag_add (GtkWidget *widget); /* These two functions enable drag and/or drop on a widget, * and also let Gtk know what data types will be accepted (use MIME * type naming, plus tacking "URL:" on the front for link dragging) */ void gtk_widget_dnd_drag_set (GtkWidget *widget, guint8 drag_enable, gchar **type_accept_list, guint numtypes); void gtk_widget_dnd_drop_set (GtkWidget *widget, guint8 drop_enable, gchar **type_accept_list, guint numtypes, guint8 is_destructive_operation); /* Used to reply to a DRAG_REQUEST event - if you don't want to * give the data then pass in NULL for it */ void gtk_widget_dnd_data_set (GtkWidget *widget, GdkEvent *event, gpointer data, gulong data_numbytes); #if defined (GTK_TRACE_OBJECTS) && defined (__GNUC__) # define gtk_widget_ref gtk_object_ref # define gtk_widget_unref gtk_object_unref #endif /* GTK_TRACE_OBJECTS && __GNUC__ */ #ifdef __cplusplus } #endif /* __cplusplus */ #endif /* __GTK_WIDGET_H__ */