Read/Write Access (horizontal and vertical connection)
Meaning
![](../../../Pictures/Shape-Reference/Block-Diagram/rw-access-hor.jpg) |
The Read / Write Access
is used to indicate that an agent is able to
read from or write to a storage or channel.
In this case A reads from S
and writes to the channel, whereas B reads
from the channel.
This shape layouts automatically when connected with both ends. It will choose a vertical or horizontal layout and connect to the appropriate connection points.
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Utilization
Control Points
![](../../../Pictures/Shape-Reference/Block-Diagram/rw-access-hor-control-points.jpg) |
A ) |
- moves the position of the explaining text
- appears only when text has been entered
- to enter text double click the shape or start typing while the shape is selected
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B1, B2) |
connection points of the arrow
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C ) |
allows to move the arrow along the axis
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Context Menu
Depending on the layout, whether the Read/Write Access is horizontally or vertically, you can set the alignment.
Accordingly there is always only one of the following shown in the context menu.
![](../../../Pictures/Shape-Reference/Block-Diagram/context-menu-align-vertical.png) |
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Align Top - The shape will be aligned at the top end-point. |
Align Center - The shape will be aligned at the center (always shown by the dotted line). |
Align Bottom - The shape will be aligned at the bottom end-point. |
![](../../../Pictures/Shape-Reference/Block-Diagram/rw-access-hor-context-menu.png)
![](../../../Pictures/Shape-Reference/Block-Diagram/context-menu-align-horizontal.png) |
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Align Left - The shape will be aligned at the left end-point. |
Align Center - The shape will be aligned at the center (always shown by the dotted line). |
Align Right - The shape will be aligned at the right end-point. |
![](../../../Pictures/Shape-Reference/Block-Diagram/rw-access-vert-context-menu.png)
The shape can be automatically (this is the default setting) or manually layouted. To control this, use the context menu as well:
![](../../../Pictures/Shape-Reference/ER-Diagram/context-menu-layout.png) |
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Make Horizontal - If automatic layout is turned off, you can manually set the shape to horizontal. |
Make Vertical - If automatic layout is turned off, you can manually set the shape to vertical. |
Automatic Layout - The shape will layout itself either horizontally or vertically and choose appropriate connection points
of the shapes it is connected to. This depends on the position of the other shapes. |
![](../../../Pictures/Shape-Reference/Block-Diagram/context-menu-layout-rw-access-example.png)
Hints
Easy Layouting
![](../../../Pictures/Shape-Reference/Block-Diagram/rw-access-hor-hint1.jpg) |
The arrow will always stick to the horizontal/vertical axis. If the two connection points that span the arrows are moved the arrow will try to follow. The connection points determine only the horizontal/vertical position of the access arrow. It can be positioned freely along the vertical/horizontal axis. To do so simply drag the control point in the very center of the arrow. The green dotted line indicates the vertical/horizontal center of the end points and the drag point will snap to the center line.
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See also
Read / Write Access (direct connection)
Read/Write L,S Access (horizontal)
Modifying Access (horizontal and vertical connection)
Modifying Access (direct connection)