The QtiPlot Handbook
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# Line Options

This dialog allows modification of lines or arroww which have been created with either the Draw Arrow command from the Graph Menu or the Ctrl-Alt-A. The dialog can also be opened by double clicking on an arrow or line, or by right clicking a selected arrow or line and then selecting Properties... from the resulting pop-up menu.

The first tab of the dialog allows changing the color, line type and line width. Line width is set in pixels. It is possible to define a default style for all new lines by clicking the Set Default button.

Figure 5-12. The Arrow Options Dialog: First Tab

The Arrow Head tab is used to modify arrow head shape. Length is in pixels and the angle is in degrees. It is also possible to define a default style for arrow heads using the Set Default button.

Figure 5-13. The Arrow Options Dialog: Second Tab

The Geometry tab is used to specify the starting and ending points of the selected line/arrow. The coordinates can be set as a function of the scale values displayed on the left (Y) and bottom (X) axes, or in pixels, by choosing the desired method from the Unit pull-down list. Pixel coordinates are relative to the top-left corner of the layer which contains the line.

Figure 5-14. The Geometry Dialog: Third Tab

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