/*	Public domain	*/

#ifndef _AGAR_GUI_PANE_H_
#define _AGAR_GUI_PANE_H_

#include <agar/gui/widget.h>
#include <agar/gui/box.h>

#include <agar/gui/begin.h>

enum ag_pane_type {
	AG_PANE_HORIZ,                      /* div[0..1] = { Left, Right } */
	AG_PANE_VERT,                       /* div[0..1] = { Top, Bottom } */
	AG_PANE_TYPE_LAST
};
enum ag_pane_resize_action {
	AG_PANE_EXPAND_DIV1,                /* Expand left/upper division */
	AG_PANE_EXPAND_DIV2,                /* Expand right/lower division */
	AG_PANE_DIVIDE_EVEN,                /* Divide evenly */
	AG_PANE_DIVIDE_PCT                  /* Divide percent (%) constant */
};

typedef struct ag_pane {
	struct ag_widget wid;               /* AG_Widget -> AG_Pane */
	enum ag_pane_type type;             /* Horizontal or Vertical */
	Uint flags;
#define AG_PANE_HFILL          0x001
#define AG_PANE_VFILL          0x002
#define AG_PANE_DIV1FILL       0x004        /* Expand div1 (default is div2) */
#define AG_PANE_FRAME          0x008        /* Display frames for each division */
#define AG_PANE_UNMOVABLE      0x100        /* Pane is not user-movable */
#define AG_PANE_OVERRIDE_WDIV  0x200        /* Override bar width (ignore zoom) */
#define AG_PANE_EXPAND        (AG_PANE_HFILL | AG_PANE_VFILL)

	AG_Box *_Nonnull div[2];            /* Sub-containers */

	int wMin[2], hMin[2];               /* Minimum geometry */
	int wReq[2], hReq[2];               /* Requisition geometry */
	int dmoving;                        /* Divider is being moved */
	int dx;                             /* Actual divider position */
	int rx;                             /* Requested divider position */
	int rxPct;                          /* Requested position in % */
	int wDiv;                           /* Divider width */

	enum ag_pane_resize_action resizeAction; /* Selected resize action */

	AG_CursorArea *_Nullable ca;        /* Cursor changing area (over bar) */
} AG_Pane;

#define   AGPANE(o)        ((AG_Pane *)(o))
#define  AGcPANE(o)        ((const AG_Pane *)(o))
#define  AG_PANE_ISA(o)    (((AGOBJECT(o)->cid & 0xff000000) >> 24) == 0x1C)
#define  AG_PANE_SELF()    AGPANE(  AG_OBJECT(0,         "AG_Widget:AG_Pane:*") )
#define  AG_PANE_PTR(n)    AGPANE(  AG_OBJECT((n),       "AG_Widget:AG_Pane:*") )
#define  AG_PANE_NAMED(n)  AGPANE(  AG_OBJECT_NAMED((n), "AG_Widget:AG_Pane:*") )
#define AG_cPANE_SELF()   AGcPANE( AG_cOBJECT(0,         "AG_Widget:AG_Pane:*") )
#define AG_cPANE_PTR(n)   AGcPANE( AG_cOBJECT((n),       "AG_Widget:AG_Pane:*") )
#define AG_cPANE_NAMED(n) AGcPANE( AG_cOBJECT_NAMED((n), "AG_Widget:AG_Pane:*") )

#ifdef AG_LEGACY
#define AG_PANE_FORCE_DIV1FILL	0x010
#define AG_PANE_FORCE_DIV2FILL	0x020
#define AG_PANE_DIV		0x040
#define AG_PANE_FORCE_DIV	0x080
#endif

__BEGIN_DECLS
extern AG_WidgetClass agPaneClass;

AG_Pane	*_Nonnull AG_PaneNew(void *_Nullable, enum ag_pane_type, Uint);
AG_Pane	*_Nonnull AG_PaneNewHoriz(void *_Nullable, Uint);
AG_Pane	*_Nonnull AG_PaneNewVert(void *_Nullable, Uint);

void AG_PaneAttachBox(AG_Pane *_Nonnull, int, AG_Box *_Nonnull);
void AG_PaneAttachBoxes(AG_Pane *_Nonnull, AG_Box *_Nonnull, AG_Box *_Nonnull);
void AG_PaneSetDividerWidth(AG_Pane *_Nonnull, int);
void AG_PaneSetDivisionMin(AG_Pane *_Nonnull, int, int,int);
void AG_PaneSetDivisionPacking(AG_Pane *_Nonnull, int, enum ag_box_type);
int  AG_PaneMoveDivider(AG_Pane *_Nonnull, int);
int  AG_PaneMoveDividerPct(AG_Pane *_Nonnull, int);
void AG_PaneResizeAction(AG_Pane *_Nonnull, enum ag_pane_resize_action);
__END_DECLS

#include <agar/gui/close.h>
#endif /* _AGAR_GUI_PANE_H_ */
