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-- File: MFT_TextManager.cdl
-- Created: Tue Apr 29 09:14:42 1993
-- Author: Gerard GRAS
-- <gg@photox>
---Copyright: Matra Datavision 1993
class TextManager from MFT inherits TShared from MMgt
---Purpose: defines the common behaviour of the MFT output driver.
-- Warning: Permits to receives draw primitives from the FontManager
-- at DrawText(...) time.
-- This class must be redefined by the user as an application class
-- connected to a user driver.
uses
FontManager from MFT,
PlaneAngle from Quantity,
Length from Quantity
is
-------------------------
-- Category: Constructors
-------------------------
Create returns TextManager from MFT;
---Purpose: Does NOTHING
-------------------------
-- Category: Draw methods
-------------------------
BeginString (me: mutable;
X,Y: Length from Quantity;
anOrientation: PlaneAngle from Quantity;
aWidth,aHeight: Length from Quantity;
aSlant: PlaneAngle from Quantity;
aPaintType: Integer from Standard) is virtual;
---Purpose: Calls when string drawing is started.
-- with a string aspect <aPaintType> :
-- 0 for filled string
-- 1 for stroke string
-- 2 for outline string
-- The origine of the string <X>,<Y>,
-- The orientation of the string <anOrientation>,
-- The medium size of the char <aWidth,aHeight>,
-- The Slant of the char <aSlant>,
BeginChar (me: mutable;
aCharCode: Integer from Standard;
X,Y: Length from Quantity)
returns Boolean from Standard is virtual;
---Purpose: Calls when a char drawing is started
-- and give the relative char start position from the beginning
-- of the string.
-- The application can returns FALSE for skipping the char drawing.
SetCharBoundingBox (me: mutable;
X1,Y1,X2,Y2,X3,Y3,X4,Y4: Length from Quantity)
returns Boolean from Standard is virtual;
---Purpose: Calls to defines the current char bounding-box with :
-- X1,Y1 : the lower left corner of the box,
-- X2,Y2 : the lower right corner of the box,
-- X3,Y3 : the upper right corner of the box,
-- X4,Y4 : the upper left corner of the box.
-- Warning: the char bounding box is not rectangular when the Slant is != 0.
-- The application can returns FALSE for skipping the char drawing.
SetCharEncoding (me: mutable;
anEncoding: CString from Standard)
returns Boolean from Standard is virtual;
---Purpose: Calls to defines the current char encoding.
-- Warning: The application can returns FALSE for skipping the char drawing.
Moveto (me: mutable;
X,Y: Length from Quantity)
returns Boolean from Standard is virtual;
---Purpose: Calls to sets the current string position.
-- The application can returns FALSE for skipping the char drawing.
Lineto (me: mutable;
X,Y: Length from Quantity)
returns Boolean from Standard is virtual;
---Purpose: Calls to drawn to the current string position.
-- The application can returns FALSE for skipping the char drawing.
Curveto (me: mutable;
X1,Y1,X2,Y2,X3,Y3,X4,Y4: Length from Quantity)
returns Boolean from Standard is virtual;
---Purpose: Calls to drawn to the current string position.
-- The application can drawn the curve defined by
-- his descriptor P1,P2,P3,P4 or
-- returns FALSE to let the interpretor compute the curve
-- vectors.
ClosePath (me: mutable) is virtual;
---Purpose: Calls when a char path drawing is ended
EndChar (me: mutable;
X,Y: Length from Quantity)
returns Boolean from Standard is virtual;
---Purpose: Calls when a char drawing is ended
-- and give the relative char ending position from the
-- beginning of the string.
-- The application can returns FALSE for skipping the string
-- drawing.
EndString (me: mutable ) is virtual;
---Purpose: Calls when string drawing is ended (Normally the last call).
-------------------------
-- Category: Private methods
-------------------------
MinMax (myclass;
Xmin,Ymin,Xmax,Ymax: out Length from Quantity)
is private;
---Purpose: Returns the current drawn string min-max.
Encoding (myclass)
returns CString from Standard is private;
---Purpose: Returns the current drawn char encoding.
friends
class FontManager from MFT
end TextManager from MFT;
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