Smalltalk/X Webserver

Documentation of class 'FramedBox':

Class: FramedBox

Inheritance
Description
Instance protocol
Examples

Inheritance:

   Object
   |
   +--GraphicsMedium
      |
      +--DisplaySurface
         |
         +--SimpleView
            |
            +--FramedBox

Package:: stx:libwidg

Category:: Views-Layout

Version:: rev: 1.75 date: 2023/07/06 14:35:51; user: cg; file: FramedBox.st directory: libwidg; module: stx stc-classLibrary: libwidg

Description:

a frame around something. The frame may have a label, whose position
is controlled by the labelPosition variable, a symbol which may be one of:
[#topCenter #topLeft #topRight #bottomLeft #bottomCenter #bottomRight #hidden]

The default labelPosition is controlled by the styleSheet variable:
'framedBoxLabelPosition' (usually, #topCenter).

Its also possible, to not show the frame but only the label, by setting
showFrame to false.

The distance from the outer viewBorder to the frame is controlled by
horizontalSpace / verticalSpace. The default is the font's height.

The distance from the frame to the interior area is controlled by
innerHorizontalSpace / innerVerticalSpace. The default is 0.

copyrightCOPYRIGHT (c) 1991 by Claus Gittinger
             All Rights Reserved

This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice.   This software may not
be provided or otherwise made available to, or used by, any
other person.  No title to or ownership of the software is
hereby transferred.

Instance protocol:

accessing

font: aFont: set the frame labelstrings font.
CAVEAT: with the addition of Text objects,
this method is going to be obsoleted by a textStyle
method, which allows specific control over
normalFont/boldFont/italicFont parameters.
frameColor: return the frame's color
frameColor: aColor: set the frame's foreground color
frameLineStyle: more control over the frame:
nil no frame
#all full rectangle
#topLine only a line at the top
frameLineStyle: aSymbolOrNil: more control over the frame:
nil no frame
#all full rectangle
#topLine only a line at the top
frameShown: return true, if frame is shown;
if false, only the label is shown.
OBSOLETE; use #showFrame.
horizontalSpace: return the number of pixels by which the frame is inset horizontally.
The default, nil, lets the box compute the horizontal inset from the
label's font height.
horizontalSpace: aNumber: set the number of pixels by which the frame is inset horizontally.
The default, nil, lets the box compute the horizontal inset from the
label's font height.
innerHorizontalSpace: aNumber: set the number of pixels by which the interior is inset horizontally from the frame.
The default is 0
innerVerticalSpace: aNumber: set the number of pixels by which the interior is inset vertically from the frame.
The default is 0
label: return the frames labelstring
label: aStringOrImage: set the frames labelstring or labelImage
labelPosition: return the labelPosition, which is a symbol describing
the label's position.
labelPosition: aSymbol: define the position of the label;
aSymbol may be one of:
#topLeft, #topCenter, #topRight;
#bottomLeft, #bottomCenter or #bottomRight
#hidden
layout: something: OBSOLETE compatibility interface. Will vanish.
In the meantime, try to figure out what is meant ... a kludge

** This is an obsolete interface - do not use it (it may vanish in future versions) **
setLabel: anImage: set the frames label.
same as #label: for ST-80 GroupBox compatibility
setLabelString: anImage: set the frames label.
same as #label: for ST-80 GroupBox compatibility
showFrame: return if the view shows its frame.
If false, only the label is drawn.
Now that we have frameLineStyle, this is kept for backward compatibility
showFrame: aBoolean: turn on/off showing of the frame -
without a frame, only the label is shown at its position.
(unless the label is nil or #hidden).
Now that we have frameLineStyle, this is kept for backward compatibility
verticalSpace: return the number of pixels by which the frame is inset vertically.
The default, nil, lets the box compute the vertical inset from the
label's font height.
verticalSpace: aNumber: set the number of pixels by which the frame is inset vertically.
The default, nil, lets the box compute the vertical inset from the
label's font height.

accessing-channels

labelChannel: return the labelChannel - or nil.
If not nil, it should provide the actual label via #value
(and may send out change notifications).
If nil, the static label is used.
labelChannel: aValueHolder: set the labelChannel - a valueHolder holding a string
which is shown as my logo.
If not nil, it should provide the actual label via #value
(and may send out change notifications).
If nil, the static label is used.

accessing-color & font

foregroundColor: return the label's foreground color
foregroundColor: aColor: set the frame label's foreground color

change & update

update: what with: aPara from: aModel: the MVC way of changing the label ...

drawing

drawFrame: redraw the frame
redraw: redraw the frame and name if present

event handling

sizeChanged: how from: oldExtentOrNil: my view has changed the size (not the contents)

initialization

fetchDeviceResources: fetch device colors, to avoid reallocation at redraw time
initStyle: setup style specifics.
The default position is top-center, except for ms-windows, where
the text is positioned at top-left
initialize: (comment from inherited method)
initialize all state of the view - usually redefined in subclasses,
but always doing a 'super initialize'. Each class should setup its
locals - and not forget the others.
View setup is separated into two parts, the general setup done here
and the style specific setup in initStyle. Each view should be prepared
for a stylechange by being sent another initStyle with a new style value.
(in this case, it should set all of its style-dependent things, but
leave the state and contents as-is)
release: (comment from inherited method)
remove all dependencies from the receiver

queries

computePreferredExtent: compute the boxes preferredExtent from the components' sizes.
Redefined to add space for the frame to the default extent
viewRectangle: return the inside area
- redefined to save frame from relative computations.

Examples:

simple:

    |top frame1 frame2 frame3|

    top := StandardSystemView new.
    top extent:300@200.

    frame1 := FramedBox origin:0.0@0.0 corner:0.5@0.5 in:top.
    frame1 label:'frame1'.

    frame2 := FramedBox origin:0.5@0.0 corner:1.0@0.5 in:top.
    frame2 label:'frame2'.

    frame3 := FramedBox origin:0.0@0.5 corner:1.0@1.0 in:top.
    frame3 label:'frame3'.

    top open

non-string label:

    |top frame|

    top := StandardSystemView new.
    top extent:300@200.

    frame := FramedBox origin:0.0@0.0 corner:1.0@1.0 in:top.
    frame label:(Image fromFile:'bitmaps/SBrowser.xbm').

    top open

placing something inside:

    |top frame1 frame2 frame3 v1 v2 v3|

    top := StandardSystemView new.
    top extent:300@200.

    frame1 := FramedBox origin:0.0@0.0 corner:0.5@0.5 in:top.
    frame1 label:'frame1'.
    v1 := View origin:0.0@0.0 corner:1.0@1.0 in:frame1.
    v1 viewBackground:(Color yellow);
       level:1.

    frame2 := FramedBox origin:0.5@0.0 corner:1.0@0.5 in:top.
    frame2 label:'frame2'.
    v2 := View origin:0.0@0.0 corner:1.0@1.0 in:frame2.
    v2 viewBackground:(Color red);
       level:1.

    frame3 := FramedBox origin:0.0@0.5 corner:1.0@1.0 in:top.
    frame3 label:'frame3'.
    v3 := View origin:0.0@0.0 corner:1.0@1.0 in:frame3.
    v3 viewBackground:(Color green);
       level:1.

    top open

placing something inside a frame in a dialog:

    |box panel frame1 frame2 frame3 v1 v1b v2 v3|

    box := Dialog new.

    frame1 := FramedBox label:'frame1'.
    panel := HorizontalPanelView origin:0.0@0.0 corner:1.0@1.0 in:frame1.
    v1 := View extent:100@100 in:panel.
    v1 viewBackground:(Color red);
       level:1.
    v1b := View extent:100@100 in:panel.
    v1b viewBackground:(Color yellow);
        level:1.

    box addComponent:frame1.

    frame2 := FramedBox label:'frame2'.
    v2 := View origin:0.0@0.0 corner:1.0@1.0 in:frame2.
    v2 viewBackground:(Color green);
       level:1.
    box addComponent:frame2.

    frame3 := FramedBox label:'frame3'.
    v3 := View origin:0.0@0.0 corner:1.0@1.0 in:frame3.
    v3 viewBackground:(Color blue);
       level:1.
    box addComponent:frame3.

    box addOkButton.
    box stickAtBottomWithVariableHeight:frame3.
    box open

placing something inside a frame in a dialog:

    |box panel frame1 frame2 frame3 v1 v1b v2 v3|

    box := Dialog new.

    frame1 := FramedBox label:'frame1'.
    panel := VerticalPanelView origin:0.0@0.0 corner:1.0@1.0 in:frame1.
    v1 := View extent:100@100 in:panel.
    v1 viewBackground:(Color red);
       level:1.
    v1b := View extent:100@100 in:panel.
    v1b viewBackground:(Color yellow);
        level:1.

    box addComponent:frame1.

    frame2 := FramedBox label:'frame2'.
    v2 := View origin:0.0@0.0 corner:1.0@1.0 in:frame2.
    v2 viewBackground:(Color green);
       level:1.
    box addComponent:frame2.

    frame3 := FramedBox label:'frame3'.
    v3 := View origin:0.0@0.0 corner:1.0@1.0 in:frame3.
    v3 viewBackground:(Color blue);
       level:1.
    box addComponent:frame3.

    box addOkButton.
    box stickAtBottomWithVariableHeight:frame3.
    box open

simple again, default spacings:

    |top frame v|

    top := StandardSystemView new.
    top extent:300@200.

    frame := FramedBox origin:0.0@0.0 corner:0.5@0.5 in:top.
    frame label:'frame'.

    v := View origin:0.0@0.0 corner:1.0@1.0 in:frame.
    v viewBackground:(Color yellow); level:1.

    top open

changing spacings:

    |top frame v|

    top := StandardSystemView new.
    top extent:300@200.

    frame := FramedBox origin:0.0@0.0 corner:0.5@0.5 in:top.
    frame label:'frame'.
    frame horizontalSpace:30.
    frame verticalSpace:20.

    v := View origin:0.0@0.0 corner:1.0@1.0 in:frame.
    v viewBackground:(Color yellow); level:1.

    top open

changing inner spacings:

    |top frame v|

    top := StandardSystemView new.
    top extent:300@200.

    frame := FramedBox origin:0.0@0.0 corner:0.5@0.5 in:top.
    frame label:'frame'.
    frame innerHorizontalSpace:30.
    frame innerVerticalSpace:20.

    v := View origin:0.0@0.0 corner:1.0@1.0 in:frame.
    v viewBackground:(Color yellow); level:1.

    top open

label only (no frame around):

    |top frame v|

    top := StandardSystemView new.
    top extent:300@200.

    frame := FramedBox origin:0.0@0.0 corner:0.5@0.5 in:top.
    frame label:'frame'.
    frame showFrame:false.

    v := View origin:0.0@0.0 corner:1.0@1.0 in:frame.
    v viewBackground:(Color yellow); level:1.

    top open

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