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AG_SOCKET(3) Library Functions Manual AG_SOCKET(3) NAME AG_Socket -- agar socket widget SYNOPSIS #include <agar/core.h> #include <agar/gui.h> DESCRIPTION The AG_Socket widget is a place holder for one or more drag-and-drop- pable AG_Icon(3) widgets (or subclasses of it). AG_Socket also pro- vides a boolean `state' binding and a numerical `count' binding. INHERITANCE HIERARCHY AG_Object(3) -> AG_Widget(3) -> AG_Socket. INITIALIZATION AG_Socket * AG_SocketNew(AG_Widget *parent, Uint flags) AG_Socket * AG_SocketFromSurface(AG_Widget *parent, Uint flags, AG_Surface *s) AG_Socket * AG_SocketFromBMP(AG_Widget *parent, Uint flags, const char *file) void AG_SocketInsertFn(AG_Socket *socket, int (*fn)(AG_Socket *, AG_Icon *)) void AG_SocketRemoveFn(AG_Socket *socket, void (*fn)(AG_Socket *, AG_Icon *)) void AG_SocketOverlayFn(AG_Socket *socket, AG_EventFn fn, const char *fmt, ...) void AG_SocketSetPadding(AG_Socket *socket, int left, int right, int top, int bottom) void AG_SocketBgRect(AG_Socket *socket, Uint width, Uint height) void AG_SocketBgCircle(AG_Socket *socket, Uint radius) void AG_SocketBgPixmap(AG_Socket *socket, const AG_Surface *s) void AG_SocketBgPixmapNODUP(AG_Socket *socket, AG_Surface *s) The AG_SocketNew() function allocates, initializes, and attaches a new AG_Socket widget. The AG_SocketFromSurface() and AG_SocketFromBMP() variants also set a background image for the socket, typically used to show the type of icons that can be drag-and-dropped onto the socket. Acceptable flags include: AG_SOCKET_STICKY_STATE Mouse click should toggle the boolean state. AG_SOCKET_HFILL Expand horizontally in parent container. AG_SOCKET_VFILL Expand vertically in parent container. AG_SOCKET_EXPAND Shorthand for AG_SOCKET_HFILL | AG_SOCKET_VFILL. The AG_SocketInsertFn() function configures a callback routine fn() that will be invoked whenever the user tries to drop an icon onto the socket. A pointer to the socket and the icon being dropped will be passed to that function. Typically, this routine will use AG_SocketInsertIcon() to assign the icon to the socket. If fn() re- turns 1, the drag-and-drop item will be destroyed. The AG_SocketRemoveFn() function registers a callback routine that will be invoked before an icon is removed from a socket. The AG_SocketOverlayFn() registers a routine that will be invoked in rendering context to draw items on top of the socket (and any contained icons). The AG_SocketSetPadding() function sets the padding around the socket's icon area in pixels. AG_SocketBgRect() configures the socket to use a rectangular shape of the given dimensions in pixels. AG_SocketBgCircle() arranges for the socket to use a circular shape of the given radius in pixels. AG_SocketBgPixmap() uses (a duplicate of) the given surface as back- ground image. The AG_SocketBgPixmapNODUP() variant uses the surface without copy (potentially unsafe). EVENTS The AG_Socket widget generates the following events: socket-mouseoverlap(int state) Cursor has moved inside or outside socket area. socket-click(int state) User has clicked on the socket area. BINDINGS The AG_Socket widget provides the following bindings. BOOL *state A generic boolean state associated with the socket. INT *count A generic "count" associated with the socket. Typically used when the socket contains a stack of items. EXAMPLES See tests/sockets.c in the Agar source distribution. STRUCTURE DATA For the AG_Socket object: AG_Icon *icon Icon in socket or NULL (read-only). SEE ALSO AG_Button(3), AG_Intro(3), AG_Pixmap(3), AG_Surface(3), AG_Widget(3), AG_Window(3) HISTORY The AG_Socket widget first appeared in Agar 1.0. Agar 1.7 December 21, 2022 AG_SOCKET(3)
NAME | SYNOPSIS | DESCRIPTION | INHERITANCE HIERARCHY | INITIALIZATION | EVENTS | BINDINGS | EXAMPLES | STRUCTURE DATA | SEE ALSO | HISTORY
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