iReport Ultimate Guide - Nimsoft Library

iReport Ultimate GuideFigure 13-37 Specifying the value expression for an angular dialEnter an expression based on your data that evaluates to a numeric value. The example in Figure 13-37 shows only a constantvalue but demonstrates how the expression must return an object of the expected type.The Angular Dial tab also includes properties that determine how this particular dial will appear; for example, color, radius,and rear extension of the pointer. The simple view lets you set these properties statically, or you can click Show AdvancedOptions to enter expressions that will set the all properties dynamically based on your data.The Widget Data tab for the linear pointer gives you a list of pointers, and the dialog to add or modify a pointer is similar tothat of a dial, only with different properties.Figure 13-38 Specifying the value expression for a linear pointerFor most types of gauges, you can define color ranges for the dials or pointer. A color range defines an area of the chart basedon a minimum and a maximum value. Use the Color Range tab in the Widget Properties window to define one or more colorranges on your gauge. Figure 13-39 shows an angular dial with two dials (needles) and two color ranges.268