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#pragma once
/* Base class for UI widgets. */
#include "metrics.h"
#include <the_Foundation/object.h>
#include <the_Foundation/objectlist.h>
#include <the_Foundation/rect.h>
#include <the_Foundation/string.h>
#include <SDL_events.h>
#define iDeclareWidgetClass(className) \
iDeclareType(className); \
typedef iWidgetClass i##className##Class; \
extern i##className##Class Class_##className;
iDeclareType(Widget)
iBeginDeclareClass(Widget)
iBool (*processEvent) (iWidget *, const SDL_Event *);
void (*draw) (const iWidget *);
iEndDeclareClass(Widget)
enum iWidgetFlag {
hidden_WidgetFlag = iBit(1),
disabled_WidgetFlag = iBit(2),
hover_WidgetFlag = iBit(3), /* eligible for mouse hover */
selected_WidgetFlag = iBit(4),
pressed_WidgetFlag = iBit(5),
alignLeft_WidgetFlag = iBit(6),
alignRight_WidgetFlag = iBit(7),
frameless_WidgetFlag = iBit(8),
drawKey_WidgetFlag = iBit(10),
focusable_WidgetFlag = iBit(11),
keepOnTop_WidgetFlag = iBit(12), /* gets events first; drawn last */
arrangeHorizontal_WidgetFlag = iBit(17), /* arrange children horizontally */
arrangeVertical_WidgetFlag = iBit(18), /* arrange children vertically */
arrangeWidth_WidgetFlag = iBit(19), /* area of children becomes parent size */
arrangeHeight_WidgetFlag = iBit(20), /* area of children becomes parent size */
arrangeSize_WidgetFlag = arrangeWidth_WidgetFlag | arrangeHeight_WidgetFlag,
resizeChildren_WidgetFlag = iBit(21), /* resize children to fill parent size */
expand_WidgetFlag = iBit(22),
fixedWidth_WidgetFlag = iBit(23),
fixedHeight_WidgetFlag = iBit(24),
fixedSize_WidgetFlag = fixedWidth_WidgetFlag | fixedHeight_WidgetFlag,
resizeChildrenToWidestChild_WidgetFlag = iBit(25),
resizeToParentWidth_WidgetFlag = iBit(26),
resizeToParentHeight_WidgetFlag = iBit(27),
moveToParentRightEdge_WidgetFlag = iBit(28),
};
enum iWidgetAddPos {
back_WidgetAddPos,
front_WidgetAddPos,
};
enum iWidgetFocusDir {
forward_WidgetFocusDir,
backward_WidgetFocusDir,
};
struct Impl_Widget {
iObject object;
iString id;
int flags;
iRect rect;
int bgColor;
iObjectList *children;
iWidget * parent;
iBool (*commandHandler)(iWidget *, const char *);
};
iDeclareObjectConstruction(Widget)
iLocalDef iWidget *as_Widget(iAnyObject *d) {
if (d) {
iAssertIsObject(d);
iAssert(isInstance_Object(d, &Class_Widget));
}
return (iWidget *) d;
}
iLocalDef const iWidget *constAs_Widget(const iAnyObject *d) {
if (d) {
iAssertIsObject(d);
iAssert(isInstance_Object(d, &Class_Widget));
}
return (const iWidget *) d;
}
void destroy_Widget (iWidget *); /* widget removed and deleted later */
void destroyPending_Widget(void);
const iString *id_Widget (const iWidget *);
int flags_Widget (const iWidget *);
iRect bounds_Widget (const iWidget *);
iInt2 localCoord_Widget (const iWidget *, iInt2 coord);
iBool contains_Widget (const iWidget *, iInt2 coord);
iAny * findChild_Widget (const iWidget *, const char *id);
iAny * findFocusable_Widget(const iWidget *startFrom, enum iWidgetFocusDir focusDir);
size_t childCount_Widget (const iWidget *);
void draw_Widget (const iWidget *);
iBool isVisible_Widget (const iWidget *);
iBool isDisabled_Widget (const iWidget *);
iBool isFocused_Widget (const iWidget *);
iBool isHover_Widget (const iWidget *);
iBool isSelected_Widget (const iWidget *);
iBool isCommand_Widget (const iWidget *d, const SDL_Event *ev, const char *cmd);
iBool hasParent_Widget (const iWidget *d, const iWidget *someParent);
void setId_Widget (iWidget *, const char *id);
void setFlags_Widget (iWidget *, int flags, iBool set);
void setPos_Widget (iWidget *, iInt2 pos);
void setSize_Widget (iWidget *, iInt2 size);
void setBackgroundColor_Widget (iWidget *, int bgColor);
void setCommandHandler_Widget (iWidget *, iBool (*handler)(iWidget *, const char *));
iAny * addChild_Widget (iWidget *, iAnyObject *child); /* holds a ref */
iAny * addChildPos_Widget (iWidget *, iAnyObject *child, enum iWidgetAddPos addPos);
iAny * addChildFlags_Widget(iWidget *, iAnyObject *child, int childFlags); /* holds a ref */
iAny * removeChild_Widget (iWidget *, iAnyObject *child); /* returns a ref */
iAny * child_Widget (iWidget *, size_t index); /* O(n) */
void arrange_Widget (iWidget *);
iBool dispatchEvent_Widget(iWidget *, const SDL_Event *);
iBool processEvent_Widget (iWidget *, const SDL_Event *);
void postCommand_Widget (const iWidget *, const char *cmd, ...);
void setFocus_Widget (iWidget *);
iWidget *focus_Widget (void);
iWidget *hover_Widget (void);
void unhover_Widget (void);
void setMouseGrab_Widget (iWidget *);
iWidget *mouseGrab_Widget (void);
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