Difference between revisions of "Conditional Visibility"
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==Changing the Visibility of Newly Created Objects== | ==Changing the Visibility of Newly Created Objects== | ||
In the [[File:Menu-options.svg|link=|16px]] [[Properties Dialog]], you can enter a condition for the visibility of an object on tab ''Advanced''. | In the [[File:Menu-options.svg|link=|16px]] [[Properties Dialog]], you can enter a condition for the visibility of an object on tab ''Advanced''. | ||
− | {{note|You can select the logic operators (e.g. ≠, ≥, ˄, ‖) from list to the right of the input field in order to create your conditional statements.}} | + | {{note|You can select the [[Boolean values#Operations|logic operators]] (e.g. ≠, ≥, ˄, ‖) from list to the right of the input field in order to create your conditional statements.}} |
{{example| | {{example| | ||
* If a is a slider, then the conditional statement a < 2 means that the corresponding object is only shown in the [[File:Menu view graphics.svg|link=|16px]] ''Graphics View'' if the slider value is less than 2. | * If a is a slider, then the conditional statement a < 2 means that the corresponding object is only shown in the [[File:Menu view graphics.svg|link=|16px]] ''Graphics View'' if the slider value is less than 2. |
Latest revision as of 11:59, 18 August 2022
Apart from just showing or hiding certain objects you can also have their visibility status depend on a certain condition. For example, you would like an object to appear on screen if you check a checkbox positioned in the Graphics View or if a slider is changed to a certain value.
Conditionally Show or Hide Existing Objects
You can use the Check Box Tool in order to create a checkbox that controls the visibility of one or more existing objects on screen.
Alternatively, you could also create a Boolean variable (e.g. b = true
) using the Input Bar and make it visible as a checkbox in the Graphics View by changing its visibility status (e.g. use Show / Hide Object Tool or the Context Menu). A checkbox therefore is a visible Boolean variable.
In order to use this Boolean variable as a condition for the visibility of certain objects, you need to follow the steps described below.
Changing the Visibility of Newly Created Objects
In the Properties Dialog, you can enter a condition for the visibility of an object on tab Advanced.
- If a is a slider, then the conditional statement a < 2 means that the corresponding object is only shown in the Graphics View if the slider value is less than 2.
- If b is a Boolean variable, you can use b as a conditional statement. The corresponding object is shown whenever the value of b is true and is hidden when the value of b is false.
- If g and h are two lines and you would like a text to be shown whenever these lines are parallel, then you could use g ‖ h as a conditional statement for the text.