MODULE StdLogos;
(**
project = "BlackBox"
organization = "www.oberon.ch"
contributors = "Oberon microsystems"
version = "System/Rsrc/About"
copyright = "System/Rsrc/About"
license = "Docu/BB-License"
changes = ""
issues = ""
**)
IMPORT Ports, Stores, Views, Controllers, Properties;
CONST
W = 4;
baseSize = 24 * Ports.point;
colBase = 00202020H;
changeColorKey = "#System:ChangeColor";
minVersion = 0; maxVersion = 0;
TYPE
View = POINTER TO RECORD (Views.View)
c: Ports.Color
END;
ChangeSizeOp = POINTER TO RECORD (Stores.Operation)
view: View;
size: INTEGER;
END;
ChangeColorOp = POINTER TO RECORD (Stores.Operation)
view: View;
color: Ports.Color
END;
(* curve painting *)
PROCEDURE Paint (f: Views.Frame; size: INTEGER; col, bgnd: Ports.Color);
VAR i, d, s, g, m, a, b, l, l0, rl, rt, rr, rb: INTEGER; c: Ports.Color;
BEGIN
s := size DIV 10; d := size DIV 2; g := d DIV 8; m := size * W DIV 2;
f.DrawOval(0, s * 2, size * W, size, Ports.fill, col);
f.DrawOval(s * W, s * 11 DIV 4, (size - s) * W, size - s * 3 DIV 4, Ports.fill, bgnd);
a := m; b := m + d; c := 7 * colBase; i := 0;
WHILE i < 4 DO
f.DrawOval(a, 0, b, d, Ports.fill, c);
INC(a, g); DEC(b, g); DEC(c, colBase); INC(i)
END;
f.rider.GetRect(rl, rt, rr, rb);
l0 := rl; l := (f.gx + m + d DIV 2) DIV f.unit;
IF l < rr THEN
f.rider.SetRect(l, rt, rr, rb);
a := m; b := m + d; c := 0; i := 0;
WHILE i < 4 DO
f.DrawOval(a, 0, b, d, Ports.fill, c);
INC(a, g); DEC(b, g); INC(c, colBase); INC(i)
END;
f.rider.SetRect(l0, rt, rr, rb)
END
END Paint;
(* ChangeOp *)
PROCEDURE (op: ChangeSizeOp) Do;
VAR v: View; size, w: INTEGER;
BEGIN
v := op.view;
size := op.size; v.context.GetSize(w, op.size); v.context.SetSize(size * W, size);
Views.Update(v, Views.keepFrames)
END Do;
PROCEDURE (op: ChangeColorOp) Do;
VAR v: View; color: Ports.Color;
BEGIN
v := op.view;
color := op.color; op.color := v.c; v.c := color;
Views.Update(v, Views.keepFrames)
END Do;
(* View *)
PROCEDURE (v: View) Internalize (VAR rd: Stores.Reader);
VAR thisVersion: INTEGER;
BEGIN
v.Internalize^(rd); IF rd.cancelled THEN RETURN END;
rd.ReadVersion(minVersion, maxVersion, thisVersion); IF rd.cancelled THEN RETURN END;
rd.ReadInt(v.c)
END Internalize;
PROCEDURE (v: View) Externalize (VAR wr: Stores.Writer);
BEGIN
v.Externalize^(wr);
wr.WriteVersion(maxVersion);
wr.WriteInt(v.c)
END Externalize;
PROCEDURE (v: View) CopyFromSimpleView (source: Views.View);
BEGIN
WITH source: View DO v.c := source.c END
END CopyFromSimpleView;
PROCEDURE (v: View) Restore (f: Views.Frame; l, t, r, b: INTEGER);
VAR w, h: INTEGER; bgnd: Ports.Color; g: Views.Frame;
BEGIN
g := f;
REPEAT
g := Views.HostOf(g);
bgnd := Views.transparent;
g.view.GetBackground(bgnd)
UNTIL bgnd # Views.transparent;
v.context.GetSize(w, h);
Paint(f, h, v.c, bgnd)
END Restore;
PROCEDURE (v: View) HandleCtrlMsg (f: Views.Frame; VAR msg: Controllers.Message;
VAR focus: Views.View);
BEGIN
WITH msg: Properties.CollectMsg DO
Views.HandlePropMsg(v, msg.poll)
| msg: Properties.EmitMsg DO
Views.HandlePropMsg(v, msg.set)
ELSE (* ignore other messages *)
END
END HandleCtrlMsg;
PROCEDURE (v: View) HandlePropMsg (VAR msg: Properties.Message);
VAR q: Properties.Property; p: Properties.StdProp;
cop: ChangeColorOp;
BEGIN
WITH msg: Properties.SizePref DO
IF (msg.w > Views.undefined) & (msg.h > Views.undefined) THEN
(* constrain proposed size *)
Properties.ProportionalConstraint(W, 1, msg.fixedW, msg.fixedH, msg.w, msg.h)
ELSE
(* return default size *)
msg.w := W * baseSize; msg.h := baseSize
END
| msg: Properties.PollMsg DO
NEW(p); p.known := {Properties.color}; p.valid := p.known;
p.color.val := v.c;
msg.prop := p
| msg: Properties.SetMsg DO
q := msg.prop;
WHILE q # NIL DO
WITH q: Properties.StdProp DO
IF Properties.color IN q.valid THEN
NEW(cop); cop.view := v; cop.color := q.color.val;
Views.Do(v, changeColorKey, cop)
END;
ELSE
END;
q :=q.next
END
ELSE
END
END HandlePropMsg;
PROCEDURE Deposit*;
VAR v: View;
BEGIN
NEW(v); v.c := Ports.grey50; Views.Deposit(v)
END Deposit;
END StdLogos.