Drawing and Graphics

Using the Drawing Interface

Displaying Bitmaps, Pictures, and Graphics Shapes

13

You can use a view of the

clPictureView

class to display a bitmap, picture, or

graphic shape (polygon). The icon slot in this view can contain a bitmap, a picture
object, or a graphic shape.

Displaying Pictures in a clEditView

13

Use the

clEditView

view class to display and accept text and graphic data in a

view. Views of the

clEditView

class contain no data directly; instead, they have

child views that contain the individual data items. Pictures are contained in child
views of the class

clPictureView

. For details on displaying text, see "Using

Views and Protos for Text Input and Display" (page 8-6).

To add a picture to a

clEditView

, you need to create an appropriate template of

the

clPictureView

class, add the template to the

viewChildren

array, and

then open the view or call

RedoChildren

. You can also use the

AddView

method to add the picture to an existing view, and then mark the view as dirty so
that it will be redrawn.

The template holding the PICT items must contain the following slots:

viewStationery

--which must have the symbol

'pict

viewBounds

--which is a bounds frame; for example,

RelBounds(0,0,40,40)

icon

--which is a bitmap frame, a picture object, or a graphic shape

Displaying Scaled Images of Other Views

13

Use the

clRemoteView

view class to display a scaled image of another view.

This class can be used to show a page preview of a full-page view in a smaller
window, for example.

The view that you want to display inside the remote view should be specified as the
single child of the remote view. This child is always hidden, and is used internally
by the remote view to construct the scaled image.

A

clRemoteView

should never have more than one view, the scaled view,

otherwise the results are undefined and subject to change.

Here is an example of a view definition of the

clRemoteView

class:

myRemoteView := {...

viewclass: clRemoteView,
viewBounds: {left: 75, top: 203, right: 178,

bottom: 322},

viewFlags: vVisible+vReadOnly,