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-
- File: labelclass.doc
- Description: Labelclass documentation.
- Copyright: (C) Copyright 1994-1995 Jaba Development.
- (C) Copyright 1994-1995 Jan van den Baard.
- All Rights Reserved.
-
- ------------------------------------------------------------------------------
-
- TABLE OF CONTENTS
-
- labelclass/--background--
- labelclass/Methods
- labelclass/Attributes
-
- labelclass/--background-- labelclass/--background--
-
- NAME
- Class: labelclass
- Superclass: IMAGECLASS
- Include File: <libraries/bgui.h>
-
- FUNCTION
- To provide a general labeling image. It supports underscoring and
- placement of the label simular to the gadtools gadget labels. It has
- been constructed in a way to make multi-line labels possible in the
- future in a compatible way
-
- labelclass/Methods labelclass/Methods
-
- NEW METHODS
- IM_EXTENT -- This method will ask a labelclass object for the amount
- of pixels the label extends the image bounding box. Normally
- this method is only used by the baseclass which handles labels
- but in some cases you might need this method for yourself. The
- method uses the following custom message structure:
-
- struct impExtent {
- ULONG MethodID; /* IM_EXTENT */
- struct RastPort *impe_RPort;
- struct IBox *impe_Extent;
- struct {
- UWORD *Width;
- UWORD *Height;
- } impe_LabelSize;
- UWORD impe_Flags;
- };
-
- impe_RPort -- This must point to the RastPort in which the
- label is to be rendered. It is copied to an internal
- buffer and on that copy font changes and calculations
- will be made so the RastPort you pass here remains
- unchanged. This must be valid.
-
- impe_Extent -- This field is used to store the label
- extentions. The label extentions are simply the number
- of pixels which the label extends the image bounding
- box in either direction. The Left and Top fields will
- always be smaller than or equal to zero. The Width and
- Height fields will always be equal to or bigger than
- zero. This must be valid.
-
- impe_LabelSize -- In this field the total pixel width and
- height of the label is stored. This must be valid.
-
- impe_Flags -- This field may contain any of the following
- flags:
-
- EXTF_MAXIMUM -- Normally when this method is called
- the returned values are the extentions as they
- are at the moment you call this method. When
- this flag is set the returned values are the
- maximum possible extentions the label can
- have.
-
- CHANGED METHODS
- None.
-
- SEE ALSO
- baseclass.doc
-
- labelclass/Attributes labelclass/Attributes
-
- NAME
- LAB_TextAttr -- ( struct TextAttr * )
-
- FUNCTION
- Set or get the font that is to be used to render the label. Please
- note that the font you pass here is opened with OpenFont() so it must
- be in memory already.
-
- Default is NULL. Applicability is (ISG).
-
- NAME
- LAB_Style -- ( UWORD )
-
- FUNCTION
- Set or get the style as defined in <graphics/text.h> which is used to
- render the font. Note that this style overrides the style of the font
- passed by the LAB_TextAttr attribute.
-
- Default is FS_NORMAL. Applicability is (ISG).
-
- SEE ALSO
- LAB_TextAttr, <graphics/text.h>
-
- NAME
- LAB_Underscore -- ( UBYTE )
-
- FUNCTION
- Set or get the character that marks the character to be underscored.
- Normally the underscored character is used to mark a key which can be
- used to control the gadget. Example:
-
- LAB_Underscore, '@'
-
- Will underscore the 'O' character in the following label:
-
- "@Open"
-
- Default is 0. Applicability is (ISG).
-
- NAME
- LAB_Place -- ( ULONG )
-
- FUNCTION
- Set or get the place relative to the image bounding box at which the
- label is rendered. The following places are possible:
-
- PLACE_IN -- The label is cenetered inside the image bounds.
-
- PLACE_LEFT -- The label is placed left of the image bounds and
- cenetered vertically.
-
- PLACE_RIGHT -- The label is placed right of the image bounds
- and cenetered vertically.
-
- PLACE_ABOVE -- The label is placed above the image bounds and
- centered horizontally.
-
- PLACE_BELOW -- The label is placed below the image bounds and
- centered horizontally.
-
- Default is PLACE_IN. Applicability is (ISG).
-
- NAME
- LAB_Label -- ( STRPTR )
-
- FUNCTION
- Set or get the actual text for the label.
-
- Default is NULL. Applicabillity is (ISG).
-
- NAME
- LAB_Flags -- ( ULONG )
-
- FUNCTION
- Set or get the flag settings of the label. The following flags are
- possible:
-
- LABF_HIGHLIGHT -- Normally the label is rendered in the
- TEXTPEN or FILLTEXTPEN color. When this flag is set
- the label is rendered in the HIGHLIGHTTEXTPEN color.
-
- LABF_HIGH_USCORE -- This is the same as LABF_HIGHLIGHT only
- now the color of the underscoring is affected.
-
- Default is 0. Applicability is (ISG).
-
- SEE ALSO
- LAB_Highlight, LAB_HighUScore, <intuition/screens.h>
-
- NAME
- LAB_Highlight -- ( BOOL )
-
- FUNCTION
- Set or clear the LABF_HIGHLIGHT flag.
-
- Default is FALSE. Applicability is (ISG).
-
- SEE ALSO
- LAB_Flags
-
- NAME
- LAB_HighUScore -- ( BOOL )
-
- FUNCTION
- Set or clear the LABF_HIGH_USCORE flags.
-
- Default is FALSE. Applicability is (ISG).
-
- SEE ALSO
- LAB_Flags
-
- NAME
- LAB_Pen, LAB_DriPen, LAB_SelectedPen, LAB_SelectedDriPen -- ( UWORD )
- ** V39 **
-
- FUNCTION
- To specify the colors of a label. The LAB_xxPen attributes must be
- used to specify the pen number of the used color. The LAB_xxxDriPen
- attributes must be used to specify the DrawInfo pen number to use.
- You can specify two colors. The text color of the label in a normal
- unselected state and the text color of the label in selected state.
-
- Specifying ~0 (-1) for the pens will deactivate the text color and
- the class will fall back to the default coloring sceme.
-
- Defaults are ~0. Applicability is (ISG).
-