PictureListBox control – PB Docs 150

PictureListBox control

A PictureListBox displays available options or values,
which can include pictures. If more options or values exist than
can display in the PictureListBox at one time or the text exceeds
the width of the PictureListBox, the PictureListBox has one or two
(vertical or horizontal) scroll bars.

PictureListBox controls can contain images in the following
formats:

  • Bitmaps, with the .BMP extension

  • Icons, with the .CUR extension

  • Cursors, with the .ICO extension

  • GIF files, with the .GIF extension,
    but not animated GIF files

  • JPEG files, with .JPEG or .JPG extensions

  • Portable Networks Graphics, with .PNG extension

Properties

PictureListBox property

Datatype

Description

Accelerator

Integer

Specifies the ASCII value of the key
you want to assign as the accelerator key for a control.

AccessibleDescription

String

A description of the control and/or
its purpose for use by accessibility tools such as readers for visually
impaired users.

AccessibleName

String

A label that briefly describes the control,
such as the text in a button or the name of a menu item.

AccessibleRole

AccessibleRole (enumerated)

Describes what kind of user interface
element the control is.

BackColor

Long

Specifies the numeric value of the background
color: -2 to 16,777,215. For more information about color, see the RGB function
in the PowerScript Reference.

Border

Boolean

Specifies whether the control has a border.
Values are:

  • TRUE
    Control has a border.

  • FALSE – Control does
    not have a border.

BorderStyle

BorderStyle (enumerated)

Specifies the style of the border of
the control. Values are:

  • StyleBox!

  • StyleLowered!

  • StyleRaised!

  • StyleShadowBox!

BringToTop

Boolean

Specifies whether PowerBuilder moves
the control to the top of the front-to-back order. Values are:

  • TRUE
    Control moved to top.

  • FALSE – Control not
    moved to top.

ClassDefinition

PowerObject

An object of type PowerObject containing
information about the class definition of the object or control.

DisableNoScroll

Boolean

Specifies behavior of scroll bar. Values
are:

  • TRUE
    The scroll bar is always visible, but is disabled when all the items
    can be accessed without it.

  • FALSE – The scroll
    bar is displayed only if it is necessary (based on the number of
    items and the height of the list box).

DragAuto

Boolean

Specifies whether PowerBuilder puts the
control automatically into Drag mode. Values are:

  • TRUE – When the control
    is clicked, the control is automatically in Drag mode.

  • FALSE – When the control
    is clicked, the control is not automatically in Drag mode. You have
    to manually put the control into Drag mode by using the Drag function.

DragIcon

String

Specifies the name of the stock icon
or the file containing the icon you want to display when the user
drags the control (the ICO file). The default
icon is a box the size of the control.

When the user drags the control, the icon displays when the control
is over an area in which the control can be dropped (a valid drop
area). When the control is over an area that is not a valid drop
area, the No-Drop icon displays.

Enabled

Boolean

Specifies whether the control is enabled
(can be selected). Values are:

  • TRUE
    Control can be selected.

  • FALSE – Control cannot
    be selected.

ExtendedSelect

Boolean

Specifies whether users can select multiple
items in the list box at one time. Values are:

  • TRUE – Users can select
    multiple items by clicking on an item and dragging the mouse up
    or down to select items; using Click or Shift+ Click to
    select a sequential group of items; or using Ctrl+ Click
    on multiple items.

  • FALSE – Users cannot
    select multiple items.

Used with MultiSelect

The MultiSelect property allows users to select multiple items
in a list box by simply clicking on the items. If MultiSelect = true and
ExtendedSelect = true, then the behavior
of ExtendedSelect takes precedence.

FaceName

String

Specifies the name of the typeface in
which the text of the control displays (for example, arial or courier).

FontCharSet

FontCharSet (enumerated)

Specifies the font character set used
for the text in the control. For a complete list of possible values,
see the list of properties for the FontCharSet variable on the Enumerated
tab page of the Browser.

FontFamily

FontFamily (enumerated)

Specifies the font family (type style)
used for the text in the control. Values are:

  • AnyFont!

  • Decorative!

  • Modern!

  • Roman!

  • Script!

  • Swiss!

FontPitch

FontPitch (enumerated)

Specifies the pitch (spacing) of the
font used for the text in the control. Values are:

  • Default!

  • Fixed!

  • Variable!

Height

Integer

Specifies the height of the control,
in PowerBuilder units.

HScrollBar

Boolean

Specifies whether a horizontal scroll
bar displays. Values are:

  • TRUE
    Horizontal scroll bar displays.

  • FALSE – Horizontal
    scroll bar does not display.

Italic

Boolean

Specifies whether the text in the control
is italic. Values are:

  • TRUE
    Text is italic.

  • FALSE – Text is not
    italic.

Item[ ]

String

Specifies the items in the control. Not
updated after initialization.

ItemPictureIndex[ ]

Integer

Specifies the picture index for each
item in the Item property array. Not updated after initialization.

MultiSelect

Boolean

Specifies whether users can select multiple
items in the PictureListBox at one time. Values are:

  • TRUE
    Users can select multiple items.

  • FALSE – Users cannot
    select multiple items.

    Used with ExtendedSelect

    The MultiSelect property allows users to select multiple items
    in a list box by simply clicking on the items. If MultiSelect = true and
    ExtendedSelect = true, then the behavior
    of ExtendedSelect takes precedence.

PictureHeight

Integer

Specifies height of the picture, in pixels.

In a script, this property can be set only when there are
no images in the image list. If the value is 0 at the time the first
image is added, the size of that image is used to set the size of
the rest of the images added.

PictureMaskColor

Long

Specifies the numeric value of the color
to be used to mask user–defined bitmaps added through the
initial picture array or with the AddPicture function.
System-defined bitmaps know their mask color so this color is ignored.
This value is used when a picture is added, and therefore can be
changed between AddPicture calls.

Values can be: -2 to 16,777,215.

For more information about color, see the RGB function
in the PowerScript Reference.

PictureName[ ]

String

Specifies the names of the files containing
the pictures added during initialization. The file extension BMP, ICO, GIF, JPG or JPEG is
required.

Not updated after initialization.

PictureWidth

Integer

Specifies width of the picture, in pixels.

In a script, this property can be set only when there are
no images in the image list. If the value is 0 at the time the first
image is added, the size of that image is used to set the size of
the rest of the images added.

Pointer

String

Specifies the name of the stock pointer
or the file containing the pointer used for the control.

RightToLeft

Boolean

Specifies that characters should be displayed
in right-to-left order. The application must be running on an operating
system that supports right-to-left display. Values are:

  • TRUE
    Characters display in right-to-left order.

  • FALSE – Characters
    display in left-to-right order.

Sorted

Boolean

Specifies whether the items in the PictureListBox
are sorted. Values are:

  • TRUE
    Items are sorted.

  • FALSE – Items are
    not sorted.

TabOrder

Integer

Specifies the tab value of the control
(0 means the user cannot tab to the control).

TabStop[ ]

Integer array

Specifies the positions of the tab stops
in the PictureListBox. The tab stops are in character positions,
and the tab stop delimiter is a space. If you assign a value to
only the first tab stop, TabStop[1], the tab stops
are equally spaced using the number of character positions specified
for the first tab stop. If more than one tab stop is entered, tab
stops are located in the positions specified. You can define 16
tab stops in the control; the default array is TabStop[8],
with a tab stop every eight character positions.

Tag

String

Specifies the tag value assigned to the
control.

TextColor

Long

Specifies the numeric value of the color
used for text: -2 to 16,777,215. For more information about color,
see the RGB function in the PowerScript
Reference
.

TextSize

Integer

Specifies the size of the text in the
control, in points. For backward compatibility, the size is stored
as a negative number; for example, 10-point text size is stored
as -10.

Underline

Boolean

Specifies whether the text in the control
is underlined. Values are:

  • TRUE
    Text is underlined.

  • FALSE – Text is not
    underlined.

Visible

Boolean

Specifies whether the control is visible.
Values are:

  • TRUE
    Control is visible.

  • FALSE – Control is
    not visible.

VScrollBar

Boolean

Specifies whether a vertical scroll bar
is displayed on the right of the PictureListBox. Values are:

  • TRUE
    Vertical scroll bar is displayed.

  • FALSE – Vertical scroll
    bar is not displayed.

Weight

Integer

Specifies the stroke weight of the text
in the control; for example, 400 for normal or 700 for bold.

Width

Integer

Specifies the width of the control, in
PowerBuilder units.

X

Integer

Specifies the X position (the distance
from the left edge of the window), in PowerBuilder units.

Y

Integer

Specifies the Y position (the distance
from the top of the window), in PowerBuilder units.

Events

PictureListBox event

Occurs

Constructor

Immediately before the Open event occurs
in the window

Destructor

Immediately after the Close event occurs
in the window

DoubleClicked

When the control is double-clicked (selected
and activated)

DragDrop

When a dragged control is dropped on
the control

DragEnter

When a dragged control enters the control

DragLeave

When a dragged control leaves the control

DragWithin

When a dragged control is within the
control

GetFocus

Just before the control receives focus
(before it is selected and becomes active)

Help

When the user presses the F1 key or drags
the context help button (question mark) from the title bar to a
menu item or control

LoseFocus

When the control loses focus (becomes
inactive)

Other

When a Control message occurs that is
not a PowerBuilder event

RButtonDown

When the right mouse button is pressed
on the control

SelectionChanged

When an item in the control is selected

Functions

PictureListBox function

Datatype returned

Description

AddItem

Integer

Adds a new item to the end of the PictureListBox.
If the Sorted property of the control is true,
the items are sorted again after the item is added.

The AddItem function does not update the
Item[ ] or ItemPicture[ ] properties
of this control.

AddPicture

Integer

Adds the bitmap, icon, or cursor file
to the main image list. Does not update PictureName[ ].

ClassName

String

Returns the name assigned to the control.

DeleteItem

Integer

Deletes the item indicated by the index
from the PictureListBox.

DeletePicture

Integer

Deletes the specified picture from the
image list. Does not update PictureName[ ].

DeletePictures

Integer

Deletes all the pictures from the image
list. Does not update PictureName[ ].

DirList

Boolean

Populates the PictureListBox with a list
of the files of the specified type that match the specified file
pattern.

DirSelect

Boolean

Returns the current selection for the
control and puts it in the specified variable.

Drag

Integer

Starts or ends the dragging of a control.

FindItem

Integer

Finds the first item in the PictureListBox
(after the specified index) that begins with the specified string.

GetContextService

Integer

Creates a reference to a context-specific
instance of the specified service.

GetParent

PowerObject

Returns a reference to the name of the
parent object.

Hide

Integer

Makes the control invisible.

InsertItem

Integer

Adds a new item to the PictureListBox
before the item indicated by the index. If the Sorted property of
the control is true, the items are sorted again
after the item is added.

Move

Integer

Moves the control to a specified location.

PointerX

Integer

Returns the distance of the pointer from
the left edge of the control.

PointerY

Integer

Returns the distance of the pointer from
the top of the control.

PostEvent

Boolean

Adds an event to the end of the message
queue for the control.

Print

Integer

Prints the control.

Reset

Integer

Removes all items from the control.

Resize

Integer

Changes the size of the control.

SelectedIndex

Integer

Returns the index of the item in the
PictureListBox that is currently selected. If more than one item
is selected, it returns the index of the first selected item.

SelectedItem

String

Returns the text of the first selected
item.

SelectItem

Integer

Finds and highlights an item in the control.
Use Syntax 1 when you know the text of the item but not its position.
Use Syntax 2 when you know the position of the item in the control’s
list or you want to clear the current selection.

SelectItem has no effect on a PictureListBox whose MultiSelect property
is true. Instead, use SetState to
select items without affecting the selected state of other items
in the list.

SetFocus

Integer

Sets focus to the control.

SetPosition

Integer

Specifies the position of the control
in the front-to-back order of the window.

SetRedraw

Integer

Controls automatic redrawing of the control
after each change in its properties.

SetState

Integer

Sets the state (highlighted or not highlighted)
of the item indicated by the specified index. SetState works only
for multiselect controls (that is, those for which the MultiSelect property
is true).

SetTop

Integer

Scrolls the items in the control so that
the item indicated by the specified index is at the top of the control.

Show

Integer

Makes the control visible.

State

Integer

Returns 1 if the item specified by the
specified index is selected (highlighted) and 0 if the item is not
selected.

Text

String

Returns the text of the item in the control
that is identified by the specified index.

Top

Integer

Returns the index number of the item
currently at the top of the control.

TotalItems

Integer

Returns the total number of items in
the control.

TotalSelected

Integer

Returns the total number of items selected
in the control.

TriggerEvent

Integer

Triggers a specified event in the control
and executes the script for the event.

TypeOf

Object

Returns the type of the control.


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