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CU Amiga Magazine's Super CD-ROM 11 (1997)(EMAP Images)(GB)(Track 1 of 3)[!][issue 1997-06].iso
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popupelems.mod
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1996-05-07
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Syntax10.Scn.Fnt
StampElems
Alloc
7 May 96
Syntax10b.Scn.Fnt
Syntax10i.Scn.Fnt
FoldElems
MODULE PopupElems; (** MF 27.1.92 /MH/CM/MAH/HM, old Style by Ralf Degner
IMPORT
Modules, Oberon, Input, Display, Viewers, Files, Fonts, Printer,
Texts, MenuViewers, TextFrames, TextPrinter, Bitmaps;
CONST
oldStyle = TRUE; (* use old ETH or new Linz style *) (*<<RD*)
ehm = 4; evm = 3; (*element: horizontal margin, vertical margin*)
mhm = 5; mvm = 2; (*menu: horizontal margin, vertical margin*)
CR = 0DX;
DUnit = TextFrames.Unit; PUnit = TextPrinter.Unit;
MR = 0; MM = 1; ML = 2; cancel = {ML, MM, MR};
white = 0; grey1 = 12; grey2 = 13; grey3 = 14; black = 15;
Elem* = POINTER TO ElemDesc;
ElemDesc* = RECORD(Texts.ElemDesc)
name*: ARRAY 32 OF CHAR;
menu*: Texts.Text;
small*: BOOLEAN; (** TRUE if elem displays itself small *)
beg, end: LONGINT; (*displayed text stretch in menu*)
n, def: INTEGER; (* number of items, default item*)
wid, lsp, dsc: INTEGER (*width, line space, descender of item lines*)
END;
EditFrame = POINTER TO EditFrameDesc;
EditFrameDesc = RECORD (TextFrames.FrameDesc)
elem: Elem
END;
ExecMsg* = RECORD (Texts.ElemMsg)
frame*: Display.Frame;
pos*: LONGINT;
keys*: SET
END;
elemPressed: BOOLEAN; (*TRUE if popup elem should be drawn in pressed mode*)
fullPlot: BOOLEAN; (*FALSE if Popup allready drawn *) (*<<RD*)
buf: Texts.Buffer; (* copy buffer *)
Wr: Texts.Writer;
(* auxiliary *)
PROCEDURE Min (x, y: INTEGER): INTEGER;
BEGIN IF x<y THEN RETURN x ELSE RETURN y END
END Min;
PROCEDURE Max (x, y: INTEGER): INTEGER;
BEGIN IF x>y THEN RETURN x ELSE RETURN y END
END Max;
PROCEDURE CopyText (T: Texts.Text): Texts.Text;
VAR t: Texts.Text; buf: Texts.Buffer; (*Save destroys the global buf*)
BEGIN
NEW(buf); Texts.OpenBuf(buf); Texts.Save(T, 0, T.len, buf);
t := TextFrames.Text(""); Texts.Append(t, buf); RETURN t
END CopyText;
PROCEDURE SetDefaultMenu (E: Elem);
BEGIN
Texts.WriteString(Wr, "right interclick to edit menu");
Texts.WriteLn(Wr); Texts.WriteLn(Wr); Texts.Append(E.menu, Wr.buf)
END SetDefaultMenu;
PROCEDURE Set (VAR r: Texts.Reader; t: Texts.Text; pos: LONGINT; line: INTEGER);
VAR i: INTEGER; ch: CHAR;
BEGIN
Texts.OpenReader(r, t, pos);
FOR i := 0 TO line-1 DO
REPEAT Texts.Read(r, ch) UNTIL ch = CR
END Set;
PROCEDURE Restore (e: Elem);
VAR t: Texts.Text; pos: LONGINT;
BEGIN
t := Texts.ElemBase(e); pos := Texts.ElemPos(e);
t.notify(t, Texts.replace, pos, pos+1)
END Restore;
(* metrics *)
PROCEDURE MeasureElem (E: Elem; fnt: Fonts.Font);
VAR i, wid, dx, x, y, w, h: INTEGER; p: LONGINT;
BEGIN
IF E.small THEN E.H := LONG(TextFrames.menuH-1)*DUnit
ELSE E.H := LONG(fnt.maxY-fnt.minY+2*evm)*DUnit
END;
IF oldStyle & E.small THEN wid:=0 ELSE wid := 2*ehm END; (* no offset for small oldStyle *) (*<<RD*)
i := 0;
WHILE E.name[i] # 0X DO Display.GetChar(fnt.raster, E.name[i], dx, x, y, w, h, p); INC(wid, dx); INC(i) END;
E.W := LONG(wid)*DUnit
END MeasureElem;
PROCEDURE MeasureMenu* (E: Elem);
(*compute E.n, E.def, E.wid, E.lsp, E.dsc*)
VAR r: Texts.Reader; ch, oldCh: CHAR; wid, dx, x, y, w, h: INTEGER; p: LONGINT;
BEGIN
IF E.menu.len = 0 THEN SetDefaultMenu(E) END;
E.wid := 0; E.n := 1; E.lsp := 0; wid := 0; oldCh := 0X; E.def := -1;
Texts.OpenReader(r, E.menu, 0); Texts.Read(r, ch);
WHILE ~r.eot DO
IF ch = CR THEN E.wid := Max(E.wid, wid); wid := 0; INC(E.n)
ELSIF r.elem # NIL THEN
E.lsp := Max(E.lsp, SHORT(r.elem.H DIV TextFrames.Unit));
INC(wid, SHORT(r.elem.W DIV TextFrames.Unit))
ELSE
E.lsp := Max(E.lsp, r.fnt.height); E.dsc := Min(E.dsc, r.fnt.minY);
Display.GetChar(r.fnt.raster, ch, dx, x, y, w, h, p); INC(wid, dx)
END;
oldCh := ch; Texts.Read(r, ch)
END;
IF oldCh = CR THEN DEC(E.n) END;
E.wid := Max(E.wid, wid); INC(E.lsp)
END MeasureMenu;
(* interactive editing of popup menus *)
PROCEDURE HandleEdit (F: Display.Frame; VAR M: Display.FrameMsg);
VAR F1: EditFrame;
BEGIN
TextFrames.Handle(F, M);
WITH F: EditFrame DO
IF M IS Oberon.CopyMsg THEN
NEW(F1);
TextFrames.Open(F1, F.text, F.org);
F1.handle := F.handle; F1.elem := F.elem; M(Oberon.CopyMsg).F := F1
END
END HandleEdit;
PROCEDURE OpenEditor (E: Elem);
VAR V: Viewers.Viewer; F: EditFrame; x, y, i: INTEGER; name: ARRAY 34 OF CHAR;
BEGIN
name[0] := 22X; i := 0; (* 22X = " *)
WHILE E.name[i] # 0X DO name[i+1] := E.name[i]; INC(i) END;
name[i+1] := 22X; name[i+2] := 0X;
Oberon.AllocateUserViewer(Oberon.Mouse.X, x, y);
NEW(F); F.elem := E; TextFrames.Open(F, CopyText(E.menu), 0); F.handle := HandleEdit;
V := MenuViewers.New(TextFrames.NewMenu(name,
"System.Close System.Copy System.Grow PopupElems.Toggle PopupElems.Update "),
F, TextFrames.menuH, x, y)
END OpenEditor;
(* file input/output *)
PROCEDURE Load (VAR R: Files.Rider; E: Elem);
CONST VersionTag = 01X; menuElem = 0;
VAR ch: CHAR; val: LONGINT; options: SET;
BEGIN
Files.Read (R, ch);
IF ch = VersionTag THEN
Files.ReadString (R, E.name);
Files.ReadNum (R, val);
Files.ReadSet (R, options);
IF menuElem IN options THEN E.small:=TRUE ELSE E.small:=FALSE END
ELSE
Files.Set (R, Files.Base (R), Files.Pos (R)-1);
Files.ReadString(R, E.name);
Files.ReadBool(R, E.small)
END;
E.menu := TextFrames.Text(""); Texts.Load(R, E.menu)
END Load
PROCEDURE Store (VAR R: Files.Rider; E: Elem);
BEGIN
Files.WriteString(R, E.name);
Files.WriteBool(R,E.small);
Texts.Store(R, E.menu)
END Store;
(* graphics *)
PROCEDURE PrintElem (E: Elem; X, Y: INTEGER; fnt: Fonts.Font);
VAR W, H: INTEGER;
BEGIN W:=SHORT((E.W-1) DIV PUnit); H:=SHORT(E.H DIV PUnit);
IF E.small THEN Printer.String(X, Y, E.name, fnt.name); Printer.ReplPattern(X, Y-2, W, 1, 2)
ELSE
INC (W, 2 * ehm * DUnit DIV PUnit);
Printer.ReplConst(X, Y, W, 2);
Printer.ReplConst(X, Y+H-2, W, 2);
Printer.ReplConst(X, Y+2, 2, H-4);
Printer.ReplConst(X+W-2, Y+2, 2, H-4);
Printer.String(X + ehm * DUnit DIV PUnit, Y + SHORT(LONG(evm-fnt.minY)*DUnit DIV PUnit),
E.name, fnt.name)
END PrintElem;
PROCEDURE DrawBigElem (pressed: BOOLEAN; X, Y, W, H: INTEGER);
BEGIN
IF oldStyle THEN (*<<RD*)
IF fullPlot THEN
Display.ReplConst(Display.white, X+2, Y, W-2, H-2, Display.replace);
Display.ReplConst(Display.white, X, Y+1, W-1, H-1, Display.replace);
Display.ReplConst(Display.black, X+1, Y+2, W-3, H-3, Display.replace)
ELSE
IF pressed THEN
Display.ReplConst(Display.black, X+2, Y, W-2, 1, Display.replace);
Display.ReplConst(Display.black, X+W-1, Y, 1, H-2, Display.replace)
ELSE
Display.ReplConst(Display.white, X+2, Y, W-2, 1, Display.replace);
Display.ReplConst(Display.white, X+W-1, Y, 1, H-2, Display.replace)
END
END
ELSE
IF pressed THEN
Display.ReplConst(grey1, X, Y, W, H, Display.replace);
Display.ReplConst(grey3, X, Y+2, W-2, H-2, Display.replace);
Display.ReplConst(grey2, X+2, Y+2, W-4, H-4, Display.replace);
Display.Dot(grey3, X, Y+1, Display.replace);
Display.Dot(grey3, X+W-2, Y+H-1, Display.replace)
ELSE
Display.ReplConst(grey3, X, Y, W, H, Display.replace);
Display.ReplConst(grey1, X, Y+2, W-2, H-2, Display.replace);
Display.ReplConst(grey2, X+2, Y+2, W-4, H-4, Display.replace);
Display.Dot(grey1, X, Y+1, Display.replace);
Display.Dot(grey1, X+W-2, Y+H-1, Display.replace)
END
END DrawBigElem;
PROCEDURE DrawSmallElem (pressed: BOOLEAN; X, Y, W, H: INTEGER);
BEGIN
IF oldStyle THEN (*<<RD*)
Display.ReplPattern(Display.white, Display.grey1, X, Y+1, W, 1, Display.invert)
ELSE
IF pressed THEN
Display.ReplConst(white, X, Y, W, H, Display.replace);
Display.ReplConst(grey3, X, Y+1, W-1, H-1, Display.replace);
Display.ReplConst(grey2, X+1, Y+1, W-2, H-2, Display.replace)
ELSE
Display.ReplConst(black, X, Y, W, H, Display.replace);
Display.ReplConst(grey3, X, Y+1, W-1, H-1, Display.replace);
Display.ReplConst(grey2, X, Y+2, W-2, H-2, Display.replace);
Display.ReplConst(white, X, Y+1, 1, H-1, Display.replace);
Display.ReplConst(white, X, Y+H-1, W-1, 1, Display.replace)
END
END DrawSmallElem;
PROCEDURE DrawElem (E: Elem; col: SHORTINT; X, Y: INTEGER; fnt: Fonts.Font);
VAR W, H: INTEGER; i, x, y, w, h, dx: INTEGER; pat: Display.Pattern;
BEGIN
W := SHORT(E.W DIV DUnit); H := SHORT(E.H DIV DUnit);
Oberon.RemoveMarks(X, Y, W, H); (*<<RD*)
IF E.small THEN DrawSmallElem(elemPressed, X, Y, W, H); INC(Y, 3)
ELSE DrawBigElem(elemPressed, X, Y, W, H); INC(Y, evm-fnt.minY)
END;
IF ~(oldStyle & E.small) THEN INC(X, ehm) END; (* no offset for small oldStyle *) (*<<RD*)
IF fullPlot THEN
i := 0;
WHILE E.name[i] # 0X DO
Display.GetChar(fnt.raster, E.name[i], dx, x, y, w, h, pat);
IF oldStyle THEN (*<<RD*)
Display.CopyPattern(col, pat, X+x, Y+y, Display.invert)
ELSE
Display.CopyPattern(col, pat, X+x, Y+y, Display.paint)
END;
INC(X, dx); INC(i)
END
END DrawElem;
PROCEDURE DrawLine (VAR r: Texts.Reader; f: Display.Frame; X, Y: INTEGER);
VAR e: Texts.Elem; ch: CHAR; dx, x, y, w, h: INTEGER; pat: Display.Pattern;
m: TextFrames.DisplayMsg;
BEGIN
LOOP Texts.Read(r, ch);
IF r.eot OR (ch = CR) THEN EXIT
ELSIF r.elem # NIL THEN
e := r.elem; y := r.fnt.minY;
m.prepare := FALSE; m.fnt := r.fnt; m.col := r.col; m.pos := Texts.Pos(r) - 1;
m.frame := f; m.X0 := X; m.Y0 := Y+y; m.elemFrame := NIL;
IF ~oldStyle THEN e.handle(e, m) END; (*<<RD*)
INC(X, SHORT(e.W DIV TextFrames.Unit))
ELSE
Display.GetChar (r.fnt.raster, ch, dx, x, y, w, h, pat);
IF oldStyle THEN (*<<RD*)
Display.CopyPattern(r.col, pat, X+x, Y+y, Display.invert)
ELSE
Display.CopyPattern(r.col, pat, X+x, Y+y, Display.paint)
END;
INC(X, dx)
END
END DrawLine;
PROCEDURE DrawMenu(E: Elem; F: Display.Frame; X, Y, W, H: INTEGER);
VAR R: Texts.Reader; X0, bot: INTEGER;
BEGIN
E.beg := 0;
IF E.n > 1 THEN
IF oldStyle THEN
Display.ReplConst(Display.white, X, Y, W, H, Display.replace);
Display.ReplConst(Display.black, X+1, Y+1, W-2, H-2, Display.replace)
ELSE
Display.ReplConst(black, X, Y, W, H, Display.replace);
Display.ReplConst(grey2, X+1, Y+1, W-2, H-2, Display.replace)
END;
bot := Y + mvm - E.dsc;
X0 := X + mhm; X := X0; Y := Y + H - mvm - E.lsp - E.dsc;
Texts.OpenReader(R, E.menu, 0);
WHILE ~R.eot & (Y >= bot) DO
DrawLine(R, F, X, Y); Y := Y - E.lsp; X := X0
END;
E.end := Texts.Pos(R)
END DrawMenu;
(* actions *)
PROCEDURE ExecCmd (E: Elem; F: Display.Frame; pos: LONGINT; keys: SET);
VAR s: Texts.Scanner; par: Oberon.ParList; res, i, j: INTEGER; ch: CHAR; m: TextFrames.TrackMsg;
BEGIN
Texts.OpenScanner(s, E.menu, pos); Texts.Scan(s);
IF (s.class = Texts.Name) & (s.line = 0) THEN
i := 0; WHILE (i < s.len) & (s.s[i] # ".") DO INC(i) END;
j := i + 1; WHILE (j < s.len) & (s.s[j] # ".") DO INC(j) END;
IF (j >= s.len) & (s.s[i] = ".") THEN
NEW(par); par.frame := F; par.vwr := Viewers.This(F.X, F.Y); par.text := E.menu; par.pos := Texts.Pos(s)-1;
Oberon.Call(s.s, par, ML IN keys, res); (* left interclick -> unload module *)
IF res > 0 THEN
Texts.WriteString(Wr, "Call error: "); Texts.WriteString(Wr, Modules.importing);
IF (res = 1) OR (res = 5) THEN Texts.WriteString(Wr, " not found")
ELSIF res = 2 THEN Texts.WriteString(Wr, " not an obj-file")
ELSIF res = 3 THEN Texts.WriteString(Wr, " imports ");
Texts.WriteString(Wr, Modules.imported); Texts.WriteString(Wr, " with bad key")
ELSIF res = 4 THEN Texts.WriteString(Wr, " not enough memory")
ELSIF res = 5 THEN Texts.WriteString(Wr, " module not found")
ELSIF res = 6 THEN Texts.WriteString(Wr, " command not found")
ELSE Texts.WriteString(Wr, " res = "); Texts.WriteInt(Wr, res, 0)
END
ELSIF res < 0 THEN
INC(i); WHILE i < s.len DO Texts.Write(Wr, s.s[i]); INC(i) END;
Texts.WriteString(Wr, " not found")
END;
IF res # 0 THEN Texts.WriteLn(Wr); Texts.Append(Oberon.Log, Wr.buf) END
END
ELSIF (s.class = Texts.Char) & (s.c = Texts.ElemChar) & (s.line = 0) THEN
Texts.OpenReader(s, E.menu, pos); Texts.Read(s, ch);
m.frame := NIL; m.keys := {MM}; s.elem.handle(s.elem, m)
END ExecCmd;
PROCEDURE SelectMenu (E: Elem; F: Display.Frame; X, Y, W, H, ex, ey, ew, eh: INTEGER; VAR cmd: INTEGER; VAR keysum: SET);
VAR mx, my, top, bot, left, right, newCmd: INTEGER; keys: SET; B: Bitmaps.Bitmap;
PROCEDURE TrackMouse (VAR x, y: INTEGER; VAR keys, keysum: SET);
BEGIN
Input.Mouse(keys, x, y); keysum := keysum+keys;
Oberon.DrawCursor(Oberon.Mouse, Oberon.Arrow, x, y)
END TrackMouse;
PROCEDURE Flip (in: BOOLEAN; cmd: INTEGER);
VAR R: Texts.Reader; x, y, w, h, X0, Y0: INTEGER;
BEGIN
IF (E.n > 1) & (cmd >= 0) THEN
X0 := X+mhm; Y0 := Y+H-(E.lsp*(cmd+1))-E.dsc-mvm;
x := left; y := Y0 + E.dsc - 1; w := right - left + 1; h := E.lsp + 2;
Oberon.RemoveMarks(x, y, w, h); (*<<RD*)
IF oldStyle THEN
Display.ReplConst(Display.black, x, y, w, h, Display.replace);
IF in THEN
Display.ReplConst(Display.white, x+1, y+1, w-2, h-2, Display.invert)
END
ELSE
IF in THEN
Display.ReplConst(black, x, y, w, 1, Display.replace);
Display.ReplConst(black, x+w-1, y, 1, h-1, Display.replace);
Display.ReplConst(white, x, y+1, 1, h-1, Display.replace);
Display.ReplConst(white, x, y+h-1, w, 1, Display.replace);
Display.ReplConst(grey1, x+1, y+1, w-2, h-2, Display.replace)
ELSE
Display.ReplConst(grey2, x, y, w, h, Display.replace)
END
END;
Set(R, E.menu, E.beg, cmd); DrawLine(R, F, X0, Y0)
END
END Flip;
PROCEDURE BwdLine (VAR pos: LONGINT);
VAR r: Texts.Reader; ch: CHAR;
BEGIN
DEC(pos);
REPEAT
DEC(pos); Texts.OpenReader(r, E.menu, pos); Texts.Read(r, ch)
UNTIL (pos = 0) OR (ch = CR);
IF ch = CR THEN INC(pos) END
END BwdLine;
PROCEDURE FwdLine (VAR pos: LONGINT);
VAR r: Texts.Reader; ch: CHAR;
BEGIN
Texts.OpenReader(r, E.menu, pos);
REPEAT Texts.Read(r, ch) UNTIL r.eot OR (ch = CR);
pos := Texts.Pos(r)
END FwdLine;
PROCEDURE ScrollUp;
BEGIN
Flip(FALSE, cmd); cmd := H DIV E.lsp - 1;
Display.CopyBlock(left, bot, W-2, H-2*mvm-E.lsp, left, bot+E.lsp, Display.replace);
FwdLine(E.beg); FwdLine(E.end); Flip(FALSE, cmd)
END ScrollUp;
PROCEDURE ScrollDown;
BEGIN
Flip(FALSE, cmd); cmd := 0;
Display.CopyBlock(left, bot+E.lsp, W-2, H-2*mvm-E.lsp, left, bot, Display.replace);
BwdLine(E.beg); BwdLine(E.end); Flip(FALSE, cmd)
END ScrollDown;
BEGIN
left:=X+1; right:=X+W-2; bot:=Y+mvm; top:=Y+H-mvm;
Oberon.RemoveMarks(X, Y, W, H); Oberon.FadeCursor(Oberon.Mouse);
B := Bitmaps.New(W, H); Bitmaps.CopyBlock(Bitmaps.Disp, B, X, Y, W, H, 0, 0, 0);
DrawMenu(E, F, X, Y, W, H);
Flip(TRUE, cmd);
keysum := {}; newCmd := -1;
REPEAT
TrackMouse(mx, my, keys, keysum);
IF keysum = cancel THEN cmd := -1
ELSIF E.n = 1 THEN (*did not pop up*)
IF (mx >= ex) & (mx <= ex+ew) & (my >= ey) & (my <= ey+eh) THEN cmd := 0 ELSE cmd := -1 END
ELSIF (mx >= left) & (mx <= right) THEN
WHILE (my <= bot) & (E.end < E.menu.len) & (keys # {}) DO ScrollUp; TrackMouse(mx, my, keys, keysum) END;
WHILE (my >= top) & (E.beg > 0) & (keys # {}) DO
Oberon.RemoveMarks(X, Y, W, H); (*<<RD*)
ScrollDown;
TrackMouse(mx, my, keys, keysum)
END;
IF (my > bot) & (my <= top) THEN
newCmd:=(top-my) DIV E.lsp;
IF newCmd # cmd THEN
Flip(FALSE, cmd); Flip(TRUE, newCmd); cmd:=newCmd
END
ELSIF (mx < ex) OR (mx >= ex+ew) OR (my < ey) OR (my >= ey+eh) OR (newCmd >= 0) THEN
Flip(FALSE, cmd); cmd := -1
END
ELSIF (mx < ex) OR (mx >= ex+ew) OR (my < ey) OR (my >= ey+eh) OR (newCmd >= 0) THEN
Flip(FALSE, cmd); cmd := -1
END
UNTIL keys = {};
(*Out.F("keysum = #$", SYSTEM.VAL(LONGINT, keysum));
IF keysum = cancel THEN HALT(99) END;*)
Oberon.FadeCursor(Oberon.Mouse);
Bitmaps.CopyBlock(B, Bitmaps.Disp, 0, 0, W, H, X, Y, 0)
END SelectMenu;
PROCEDURE Popup (E: Elem; col: SHORTINT; X, Y: INTEGER; fnt: Fonts.Font; F: Display.Frame);
VAR W, H, menuX, menuY, menuW, menuH, cmd, i: INTEGER;
r: Texts.Reader; keys: SET; draw: TextFrames.DisplayMsg; exec: ExecMsg;
BEGIN
draw.prepare := FALSE; draw.fnt := fnt; draw.col := col; draw.frame := F;
draw.X0 := X; draw.Y0 := Y;
W := SHORT(E.W DIV DUnit); H := SHORT(E.H DIV DUnit);
menuW := E.wid + 2*mhm; menuH := E.n*E.lsp + 2*mvm;
IF Y - menuH >= 0 THEN menuY := Y - menuH
ELSIF Y + H + menuH <= Display.Height THEN menuY := Y + H
ELSE menuY := 0
END;
IF X + menuW <= Display.Width THEN menuX := X
ELSE menuX := Max(X + W - menuW, 0)
END;
i := Display.Height - 2*mvm;
IF menuH > i THEN menuH := i DIV E.lsp * E.lsp + 2*mvm END;
cmd := Max(E.def, 0);
fullPlot := ~oldStyle; (*<<RD*)
elemPressed := TRUE; E.handle(E, draw);
SelectMenu(E, F, menuX, menuY, menuW, menuH, X, Y, W, H, cmd, keys);
elemPressed := FALSE; E.handle(E, draw);
fullPlot:=TRUE; (*<<RD*)
IF keys = {MM, MR} THEN OpenEditor(E)
ELSIF (keys # cancel) & (cmd > -1) THEN
E.def := cmd;
Set(r, E.menu, E.beg, cmd);
exec.frame := F; exec.pos := Texts.Pos(r); exec.keys := keys; E.handle(E, exec)
END Popup;
(* element *)
PROCEDURE Handle* (E: Texts.Elem; VAR msg: Texts.ElemMsg);
VAR e: Elem;
BEGIN
WITH E: Elem DO
WITH
msg: TextFrames.DisplayMsg DO
IF msg.prepare THEN MeasureElem(E, msg.fnt)
ELSE DrawElem(E, msg.col, msg.X0, msg.Y0, msg.fnt)
END
| msg:TextPrinter.PrintMsg DO
IF ~msg.prepare THEN PrintElem(E, msg.X0, msg.Y0, msg.fnt) END
| msg:Texts.CopyMsg DO
IF msg.e = NIL THEN NEW(e); msg.e := e ELSE e := msg.e(Elem) END;
Texts.CopyElem(E, e);
e.name:=E.name; e.n := E.n; e.wid:=E.wid; e.lsp:=E.lsp; e.dsc:=E.dsc;
e.small := E.small; e.def := E.def;
e.menu:=TextFrames.Text(""); Texts.Save(E.menu, 0, E.menu.len, buf);
Texts.Append(e.menu, buf)
| msg:Texts.IdentifyMsg DO
msg.mod:="PopupElems"; msg.proc:="Alloc"
| msg:Texts.FileMsg DO
IF msg.id=Texts.load THEN Load(msg.r, E); MeasureMenu(E)
ELSIF msg.id=Texts.store THEN Store(msg.r, E)
END
| msg:TextFrames.TrackMsg DO
IF msg.keys = {MM} THEN
Popup(E, msg.col, msg.X0, msg.Y0, msg.fnt, msg.frame); msg.keys := {}
END
| msg: ExecMsg DO ExecCmd(E, msg.frame, msg.pos, msg.keys)
ELSE
END
END Handle;
PROCEDURE Alloc*;
VAR E: Elem;
BEGIN NEW(E); E.handle:=Handle; Texts.new:=E
END Alloc;
PROCEDURE Insert0 (small: BOOLEAN);
VAR E: Elem; S: Texts.Scanner; insert: TextFrames.InsertElemMsg;
BEGIN
NEW(E); Texts.OpenScanner(S, Oberon.Par.text, Oberon.Par.pos); Texts.Scan(S);
IF ~(S.class IN {Texts.Name, Texts.String}) THEN S.s := "Popup" END;
COPY(S.s, E.name); E.small := small;
E.menu := TextFrames.Text(""); SetDefaultMenu(E);
MeasureMenu(E); E.handle := Handle;
insert.e := E; Viewers.Broadcast(insert)
END Insert0;
PROCEDURE Insert*;
BEGIN Insert0(FALSE)
END Insert;
PROCEDURE InsertMenu*;
BEGIN Insert0(TRUE)
END InsertMenu;
PROCEDURE Toggle*;
VAR E: Elem;
BEGIN
IF Oberon.Par.frame = Oberon.Par.vwr.dsc THEN
E := Oberon.Par.frame.next(EditFrame).elem; E.small := ~E.small;
Restore(E)
END Toggle;
PROCEDURE Update*;
VAR F: EditFrame; S: Texts.Scanner; menuText: Texts.Text; E: Elem;
BEGIN
IF Oberon.Par.frame = Oberon.Par.vwr.dsc THEN
F := Oberon.Par.frame.next(EditFrame); E := F.elem;
menuText := Oberon.Par.frame(TextFrames.Frame).text;
Texts.OpenScanner(S, menuText, 0); Texts.Scan(S);
IF ~(S.class IN {Texts.Name, Texts.String}) THEN S.s := "Popup" END;
COPY(S.s, E.name); E.menu := CopyText(F.text);
MeasureMenu(E); Restore(E);
Texts.OpenReader(S, menuText, menuText.len-1); Texts.Read(S, S.c);
IF S.c = "!" THEN Texts.Delete(menuText, menuText.len-1, menuText.len) END
END Update;
BEGIN
elemPressed := FALSE; fullPlot := TRUE;
NEW(buf); Texts.OpenBuf(buf); Texts.OpenWriter(Wr)
END PopupElems.