NCSA

The WhiteBoard


The Habanero Whiteboard is capable of displaying three image formats, .gif, .jpg, and .ppm. It also has a variety of tools available to draw on an image during a collaborative session. To select a tool, simply click on its icon and the tool will remain active until you click on another tool. 

WhiteBoard
 
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The Color Palette

The Whiteboard is equipped with a palette of twelve colors that you can use to select a color. When you select a color, it appears in the main color select box next to the color selector. Simply click on the color that you want to draw with, and then start drawing.

The Color Selector

If the colors in the default palette are not exactly the right color, you can use the color selector to change colors. First, select a color from the default palette. Now, you can alter the color by moving the red, green, and blue sliders in the col or selector. As you move the sliders, the color in the main color box changes to reflect the current color.

Note! Primitives that are already drawn are not effected by color changes. That means you can have more than the original twelve colors in a Whiteboard drawing.

Freehand

This primitive is used to draw a freehand line on the whiteboard. Position your cursor over the image where you want to draw and click the mouse button. Continue holding down the mouse button and move the mouse to draw on the image. Let up on the mouse button to stop drawing.

Straight Line

The straight-line primitive is used to draw a straight line on the whiteboard. Click the mouse button where you want to start drawing the line. This is the anchor point of the line. If you keep holding down the mouse button and move the mouse arou nd, you'll see a straight line with one end anchored on the image. Move the mouse to where you want the second point, and let up on the mouse button to finish drawing the line.

Pointer

The pointer primitive is used to draw a cross hair on the image to indicate a point of interest. Clicking once on the image will draw a small cross hair on the image.

Text

The text primitive is used to write text onto your image. Click the mouse where you want to start writing text. Then, type the words you want to place onto the image. After you are finished typing, press the "return" (or "enter") key to transmit the text to the other collaborators.

Rectangle

The rectangle primitive is used to draw rectangles on the screen. This is useful for highlighting large areas of an image. Click at the point where you want to start drawing the rectangle. Keep the mouse button pressed and move the mouse to draw the rectangle. Releasing the mouse button will complete the primitive.

Filled Rectangle

The filled rectangle primitive is used to draw filled rectangles on the screen. Click at the point where you want to start drawing the rectangle. Keep the mouse button pressed and move the mouse to draw the filled rectangle. Releasing the mouse button will complete the primitive.

Oval

The oval primitive is used to draw ovals on the screen. This is useful for highlighting large areas of an image. Click at the point where you want to start drawing the oval. Keep the mouse button pressed and move the mouse to draw the oval. Releas ing the mouse button will complete the primitive.

Filled Oval

The filled oval primitive is used to draw filled oval on the screen. Click at the point where you want to start drawing the filled oval. Keep the mouse button pressed and move the mouse to draw the filled oval. Releasing the mouse button will complete the primitive.

Bring To Top

This operational tool is used to bring a drawing primitive (such as the rectangle or text) to the top of the primitive "pile".

Push to Bottom
This operational tool is used to push a drawing primitive (such as a rectangle or text) to the bottom of the primitive "pile".

Delete

This operational tool is used to remove a specific drawing primitive from the Whiteboard. Once deleted, there is no way to recover the drawn primitive.

Move

This operational tool is used move a primitive located on the Whiteboard to a new location. For example, if you've already drawn a primitive on the whiteboard and need more exact placement, use this tool to move the primitive to it's new location.

Tack

This operational tool is used to tack a drawing primitive to the whiteboard. Click on the primitive you wish to tack to the whiteboard. Tacking a primitive to the whiteboard makes it immovable by other session participants. To "untack" a primitive, simply click on it again. This makes it movable by other participants again.

 


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