OhioScreen Class |
Encapsulates the host presentation space. The presentation space is a virtual screen
which contains all the characters and attributes that would be seen on a traditional
emulator screen. The OhioScreen object provides methods that manipulate text, search
the screen, send keystrokes to the host, and work with the cursor. The raw presentation
space data is maintained in a series of planes. The text plane contains the actual
characters in the presentation space. The color plane contains color characteristics.
The field plane contains the field attributes. The extended plane contains the extended
field attributes. The cursor is an offset into the virtual screen buffer and ranges
from 0 to the last character of the screen buffer.
Inheritance HierarchyNamespace: Flex.Hal.Ohio
Assembly: Flex.Hal.Ohio (in Flex.Hal.Ohio.dll) Version: 4.1.4031.1525
SyntaxThe OhioScreen type exposes the following members.
Properties| Name | Description | |
|---|---|---|
 | Columns |
Gets the number of columns in the presentation space.
|
| Cursor |
Gets or sets the location of the cursor in the presentation space.
|
| Fields |
Gets the OhioFields object associated with this presentation space.
This provides another way to access the data in the virtual screen.
|
| OIA |
Gets the OhioOIA object associated with this presentation space.
This object can be used to query the status of the operator information area.
|
| Rows |
Gets the number of rows in the presentation space.
|
| String |
Gets the entire text plane of the virtual screen as a string. All null characters
and Field Attribute characters are returned as blank space characters.
|
Methods| Name | Description | |
|---|---|---|
 | FindString |
Searches the text plane for the target string and returns it's position.
|
| GetData |
Returns an array containing the data from the Text, Color, Field or Extended plane
of the virtual screen.
|
| PutString |
Places a text string in the virtual screen at the location specified. The string
will overlay only unprotected fields and any parts of the string which fall into
protected fields will be discarded.
|
| SendAidAsync |
Sends an OhioKey to the virtual screen.
|
| SendKeysAsync |
Sends a string of keystrokes to the virtual screen. This method acts as if keystrokes
were being typed from the keyboard of a terminal. The keystrokes will be sent to the
location given. If no location is provided or the location is out of screen scope,
the keystrokes will be sent to the current cursor location.
|
| WaitForCursorAsync |
Waits for the cursor to appear at the position.
|
| WaitForCursorColumnAsync |
Waits for cursor to appear at the column position. Useful for VT sessions.
|
| WaitForNoXAsync |
Waits for the X () or X SYSTEM to be removed from the OIA line.
|
| WaitForStrAsync |
Waits for text to appear at specific virtual screen location.
|
| WaitForStrRecvAsync |
Waits for text to be received from the host.
|
See Also