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enum {
Pbackground,
Pborder,
Pmargin,
Ppadding,
Porientation,
Pbordercolour,
Ptext,
Ptextcolour,
Pmax,
};
enum {
nbaseprops = 5
};
enum {
Gcontainer,
Gtextbox,
Gmax,
};
enum {
Horizontal,
Vertical,
};
typedef struct Colour Colour;
typedef struct Spacing Spacing;
typedef union PropVal PropVal;
typedef struct PropSpec PropSpec;
typedef struct Prop Prop;
typedef struct GuiSpec GuiSpec;
typedef struct GuiElement GuiElement;
struct Colour {
Image *image;
ulong code;
};
struct Spacing {
int up;
int right;
int down;
int left;
};
union PropVal {
Colour *colour;
Spacing *spacing;
int orientation;
Rune *text;
};
struct PropSpec {
char *name;
PropVal (*def)(int, int);
char *(*print)(PropVal);
char *(*parse)(char *, PropVal *);
};
struct Prop {
int tag;
PropVal val;
Qid qid;
};
struct GuiSpec {
char *name;
void (*draw)(GuiElement *);
void (*layout)(GuiElement *, Rectangle);
int leafnode;
int nprops;
int *proptags;
};
struct GuiElement {
RWLock lock;
int type;
int id;
Qid qid;
Qid qclone;
Qid qevent;
Qid qtype;
Qid qprops;
int nchildren;
GuiElement **children;
GuiElement *parent;
int nprops;
Prop *props;
Rectangle border;
Rectangle rect;
Rectangle content;
};
extern GuiElement *root;
extern PropSpec propspecs[Pmax];
extern GuiSpec guispecs[Gmax];
extern int baseprops[nbaseprops];
void *emalloc(ulong);
int allspace(char *);
Colour *mkcolour(ulong);
void initgraphics(void);
void layout(GuiElement *, Rectangle);
void updategui(int);
void drawcontainer(GuiElement *);
void drawtextbox(GuiElement *);
void layoutcontainer(GuiElement *, Rectangle);
void layouttextbox(GuiElement *, Rectangle);
PropVal getprop(GuiElement *, int);
void setprop(GuiElement *, int, PropVal);
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