Class: DSVLabelView

• Inheritance
• Description
• Related information
• Class protocol
  • accessing
  • defaults
• Instance protocol
  • accessing
  • drawing
  • enumerating columns
  • event handling
  • focus handling
  • help
  • initialization
  • instance creation
  • queries
  • scrolling
• Private classes

Inheritance:

   Object
   |
   +--GraphicsMedium
      |
      +--DisplaySurface
         |
         +--SimpleView
            |
            +--DSVLabelView

Package:

stx:libwidg2

Category:

Views-DataSet

Version:

rev: 1.86 date: 2019/08/11 01:40:49

user: cg

file: DSVLabelView.st directory: libwidg2

module: stx stc-classLibrary: libwidg2

Author:

Claus Atzkern

Description:

shows the labels assigned to the column descriptions. 
Used as the title-part of a DataSetView.

[Instance variables:]

    dataSet         <DSVColumnView>         column view which shows the columns

    selection       <Integer or nil>        current selected index or nil.

    enabled         <Boolean>               if a press action exists on a column
                                            entry, this action could be enabled or
                                            disabled.

    preferredHeight <Integer>               the preferred height of the labelView

Related information:

    DSVColumnView
    DataSetColumnSpec
    DataSetColumn
    DataSetView

Class protocol:

 tabSpacing

returns the tab spacing

 defaultFont

Instance protocol:

 columns: aListOfColumns

the list of columns changed

 dataSet

 indexOfSortColumn

 opaqueColumnResize

 opaqueColumnResize: aBoolean

 reverseSort

 invalidate

 invalidateItemAt: anIndex

invalidate rectangle assigned to an item at an index

 redrawColumnsInX: x y: y width: w height: h

redraw a rectangle

 redrawEdgesX: x y: yTop width: aWidth height: aHeight

redraw the edges in the range

 redrawX: xArg y: y width: wArg height: h

 columnsDo: aOneArgBlock

evaluate the argument, aOneArgBlock for every column

 buttonMotion: state x: x y: y

mouse-button was moved;
redraw thumb at its new position and, if scroll-mode is asynchronous,
the scroll action is performed

 buttonPress: button x: x y: y

handle a button press event; checks whether the item under the mouse
is selectable. If true, the selection is set to the item.

 buttonRelease: button x: x y: y

handle a button press event; checks whether the item under the mouse
is the selected item. If true, the application is informed.

 fontChanged

invoked after the font has changed

 mouseWheelZoom: amount

 pointerLeave: state

mouse left view - restore cursor.

 sendClickMsgForColumnNr: colNr

inform the receiver of a button release notification

 xVisibleToColNr: x

returns the column number for a physical x position.
Returns nil if x is beyond the last column.

 canTab

 wantsFocusWithButtonPress

never wants the focus - view which keeps the labels

 helpTextAt: aPoint

return the helpText for aPoint (i.e. when mouse-pointer is moved over an item).

 initStyle

self level:0.

 initialize

super level:(self defaultLevel).

 for: aColumnView

initialization

 realize

recompute contents and fit columns to view

 columnIndexOfDescription: aColumnDescription

 computePreferredExtent

(comment from inherited method)
return my computed preferred extent - this is the minimum size I would like to have.
If there are any components, a rectangle enclosing them
is returned. Otherwise, the actual extent is returned.

 enabled

true, if widget is enabled

 enabled: aBoolean

true, if widget is enabled

 indexOfLabel: aLabel

 preferredHeight

 xVisibleOfColNr: colNr

must adjust, because dataset includes its own margin, which might be different from ours

 xVisibleToSelectionIndex: x

returns the column number assigned to a physical x or nil. If
the column exists but is not selectable nil is returned.

 copyFromX: x0 y: y0 toX: x1 y: y1 width: w invalidateX: leftX

Private classes:

    LineDrag