/* 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /* * Modified by the GTK+ Team and others 1997-1999. See the AUTHORS * file for a list of people on the GTK+ Team. See the ChangeLog * files for a list of changes. These files are distributed with * GTK+ at ftp://ftp.gtk.org/pub/gtk/. */ #ifndef __GTK_WIDGET_H__ #define __GTK_WIDGET_H__ #include #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. */ typedef 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_RC_STYLE = 1 << 16, GTK_COMPOSITE_CHILD = 1 << 17, GTK_NO_REPARENT = 1 << 18, GTK_APP_PAINTABLE = 1 << 19, GTK_RECEIVES_DEFAULT = 1 << 20, GTK_DOUBLE_BUFFERED = 1 << 21 } GtkWidgetFlags; /* Macro for casting a pointer to a GtkWidget or GtkWidgetClass pointer. * Macros for testing whether `widget' or `klass' are of type GTK_TYPE_WIDGET. */ #define GTK_TYPE_WIDGET (gtk_widget_get_type ()) #define GTK_WIDGET(widget) (GTK_CHECK_CAST ((widget), GTK_TYPE_WIDGET, GtkWidget)) #define GTK_WIDGET_CLASS(klass) (GTK_CHECK_CLASS_CAST ((klass), GTK_TYPE_WIDGET, GtkWidgetClass)) #define GTK_IS_WIDGET(widget) (GTK_CHECK_TYPE ((widget), GTK_TYPE_WIDGET)) #define GTK_IS_WIDGET_CLASS(klass) (GTK_CHECK_CLASS_TYPE ((klass), GTK_TYPE_WIDGET)) #define GTK_WIDGET_GET_CLASS(obj) (GTK_CHECK_GET_CLASS ((obj), GTK_TYPE_WIDGET, 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) != 0) #define GTK_WIDGET_NO_WINDOW(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_NO_WINDOW) != 0) #define GTK_WIDGET_REALIZED(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_REALIZED) != 0) #define GTK_WIDGET_MAPPED(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_MAPPED) != 0) #define GTK_WIDGET_VISIBLE(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_VISIBLE) != 0) #define GTK_WIDGET_DRAWABLE(wid) (GTK_WIDGET_VISIBLE (wid) && GTK_WIDGET_MAPPED (wid)) #define GTK_WIDGET_SENSITIVE(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_SENSITIVE) != 0) #define GTK_WIDGET_PARENT_SENSITIVE(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_PARENT_SENSITIVE) != 0) #define GTK_WIDGET_IS_SENSITIVE(wid) (GTK_WIDGET_SENSITIVE (wid) && \ GTK_WIDGET_PARENT_SENSITIVE (wid)) #define GTK_WIDGET_CAN_FOCUS(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_FOCUS) != 0) #define GTK_WIDGET_HAS_FOCUS(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_FOCUS) != 0) #define GTK_WIDGET_CAN_DEFAULT(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_DEFAULT) != 0) #define GTK_WIDGET_HAS_DEFAULT(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_DEFAULT) != 0) #define GTK_WIDGET_HAS_GRAB(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_GRAB) != 0) #define GTK_WIDGET_RC_STYLE(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_RC_STYLE) != 0) #define GTK_WIDGET_COMPOSITE_CHILD(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_COMPOSITE_CHILD) != 0) #define GTK_WIDGET_APP_PAINTABLE(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_APP_PAINTABLE) != 0) #define GTK_WIDGET_RECEIVES_DEFAULT(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_RECEIVES_DEFAULT) != 0) #define GTK_WIDGET_DOUBLE_BUFFERED(wid) ((GTK_WIDGET_FLAGS (wid) & GTK_DOUBLE_BUFFERED) != 0) /* 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 typedef struct _GtkRequisition GtkRequisition; typedef struct _GdkRectangle GtkAllocation; typedef struct _GtkSelectionData GtkSelectionData; 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 { gint width; gint 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.) The time field gives the timestamp at which the data was sent. */ 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 a widget of this class is activated, * gtk_widget_activate() handles the emission. * Implementation of this signal is optional. */ guint activate_signal; /* This signal is emitted when a widget of this class is added * to a scrolling aware parent, gtk_widget_set_scroll_adjustments() * handles the emission. * Implementation of this signal is optional. */ guint set_scroll_adjustments_signal; /* basics */ void (* show) (GtkWidget *widget); void (* show_all) (GtkWidget *widget); void (* hide) (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, GtkStateType previous_state); void (* parent_set) (GtkWidget *widget, GtkWidget *previous_parent); void (* style_set) (GtkWidget *widget, GtkStyle *previous_style); void (* direction_changed) (GtkWidget *widget, GtkTextDirection previous_direction); /* accelerators */ gint (* add_accelerator) (GtkWidget *widget, guint accel_signal_id, GtkAccelGroup *accel_group, guint accel_key, GdkModifierType accel_mods, GtkAccelFlags accel_flags); void (* remove_accelerator) (GtkWidget *widget, GtkAccelGroup *accel_group, guint accel_key, GdkModifierType accel_mods); /* explicit focus */ void (* grab_focus) (GtkWidget *widget); /* events */ gint (* event) (GtkWidget *widget, GdkEvent *event); gint (* button_press_event) (GtkWidget *widget, GdkEventButton *event); gint (* button_release_event) (GtkWidget *widget, GdkEventButton *event); gint (* scroll_event) (GtkWidget *widget, GdkEventScroll *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 (* visibility_notify_event) (GtkWidget *widget, GdkEventVisibility *event); gint (* client_event) (GtkWidget *widget, GdkEventClient *event); gint (* no_expose_event) (GtkWidget *widget, GdkEventAny *event); /* selection */ void (* selection_get) (GtkWidget *widget, GtkSelectionData *selection_data, guint info, guint time); void (* selection_received) (GtkWidget *widget, GtkSelectionData *selection_data, guint time); /* Source side drag signals */ void (* drag_begin) (GtkWidget *widget, GdkDragContext *context); void (* drag_end) (GtkWidget *widget, GdkDragContext *context); void (* drag_data_get) (GtkWidget *widget, GdkDragContext *context, GtkSelectionData *selection_data, guint info, guint time); void (* drag_data_delete) (GtkWidget *widget, GdkDragContext *context); /* Target side drag signals */ void (* drag_leave) (GtkWidget *widget, GdkDragContext *context, guint time); gboolean (* drag_motion) (GtkWidget *widget, GdkDragContext *context, gint x, gint y, guint time); gboolean (* drag_drop) (GtkWidget *widget, GdkDragContext *context, gint x, gint y, guint time); void (* drag_data_received) (GtkWidget *widget, GdkDragContext *context, gint x, gint y, GtkSelectionData *selection_data, guint info, guint time); /* action signals */ void (* debug_msg) (GtkWidget *widget, const gchar *string); /* Padding for future expandsion */ GtkFunction pad1; GtkFunction pad2; GtkFunction pad3; GtkFunction pad4; }; struct _GtkWidgetAuxInfo { gint16 x; gint16 y; gint16 width; gint16 height; }; struct _GtkWidgetShapeInfo { gint16 offset_x; gint16 offset_y; GdkBitmap *shape_mask; }; GtkType gtk_widget_get_type (void); GtkWidget* gtk_widget_new (GtkType type, const gchar *first_arg_name, ...); GtkWidget* gtk_widget_newv (GtkType type, guint nargs, GtkArg *args); GtkWidget* 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, const gchar *first_arg_name, ...); 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_show_now (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); /* Queuing draws */ void gtk_widget_queue_draw (GtkWidget *widget); void gtk_widget_queue_draw_area (GtkWidget *widget, gint x, gint y, gint width, gint height); void gtk_widget_queue_clear (GtkWidget *widget); void gtk_widget_queue_clear_area (GtkWidget *widget, gint x, gint y, gint width, gint height); 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_size_request (GtkWidget *widget, GtkRequisition *requisition); void gtk_widget_size_allocate (GtkWidget *widget, GtkAllocation *allocation); void gtk_widget_get_child_requisition (GtkWidget *widget, GtkRequisition *requisition); void gtk_widget_add_accelerator (GtkWidget *widget, const gchar *accel_signal, GtkAccelGroup *accel_group, guint accel_key, guint accel_mods, GtkAccelFlags accel_flags); void gtk_widget_remove_accelerator (GtkWidget *widget, GtkAccelGroup *accel_group, guint accel_key, guint accel_mods); void gtk_widget_remove_accelerators (GtkWidget *widget, const gchar *accel_signal, gboolean visible_only); guint gtk_widget_accelerator_signal (GtkWidget *widget, GtkAccelGroup *accel_group, guint accel_key, guint accel_mods); void gtk_widget_lock_accelerators (GtkWidget *widget); void gtk_widget_unlock_accelerators (GtkWidget *widget); gboolean gtk_widget_accelerators_locked (GtkWidget *widget); gint gtk_widget_event (GtkWidget *widget, GdkEvent *event); gboolean gtk_widget_activate (GtkWidget *widget); gboolean gtk_widget_set_scroll_adjustments (GtkWidget *widget, GtkAdjustment *hadjustment, GtkAdjustment *vadjustment); 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); 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, gboolean sensitive); void gtk_widget_set_app_paintable (GtkWidget *widget, gboolean app_paintable); void gtk_widget_set_double_buffered (GtkWidget *widget, gboolean double_buffered); 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_add_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); /* The following functions must not be called on an already * realized widget. Because it is possible that somebody * can call get_colormap() or get_visual() and save the * result, these functions are probably only safe to * call in a widget's init() function. */ void gtk_widget_set_colormap (GtkWidget *widget, GdkColormap *colormap); 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); /* Hide widget and return TRUE. */ gint gtk_widget_hide_on_delete (GtkWidget *widget); /* 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); void gtk_widget_modify_style (GtkWidget *widget, GtkRcStyle *style); PangoContext *gtk_widget_create_pango_context (GtkWidget *widget); PangoContext *gtk_widget_get_pango_context (GtkWidget *widget); PangoLayout *gtk_widget_create_pango_layout (GtkWidget *widget, const gchar *text); /* handle composite names for GTK_COMPOSITE_CHILD widgets, * the returned name is newly allocated. */ void gtk_widget_set_composite_name (GtkWidget *widget, const gchar *name); gchar* gtk_widget_get_composite_name (GtkWidget *widget); /* Descend recursively and set rc-style on all widgets without user styles */ void gtk_widget_reset_rc_styles (GtkWidget *widget); /* 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_composite_child (void); void gtk_widget_pop_composite_child (void); void gtk_widget_pop_style (void); void gtk_widget_pop_colormap (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); GtkStyle* gtk_widget_get_default_style (void); GdkColormap* gtk_widget_get_default_colormap (void); GdkVisual* gtk_widget_get_default_visual (void); /* Functions for setting directionality for widgets */ void gtk_widget_set_direction (GtkWidget *widget, GtkTextDirection dir); GtkTextDirection gtk_widget_get_direction (GtkWidget *widget); void gtk_widget_set_default_direction (GtkTextDirection dir); GtkTextDirection gtk_widget_get_default_direction (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); /* internal function */ void gtk_widget_reset_shapes (GtkWidget *widget); /* Compute a widget's path in the form "GtkWindow.MyLabel", and * return newly alocated strings. */ void gtk_widget_path (GtkWidget *widget, guint *path_length, gchar **path, gchar **path_reversed); void gtk_widget_class_path (GtkWidget *widget, guint *path_length, gchar **path, gchar **path_reversed); #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__ */