GUI enabling/disabling of controls: Difference between revisions
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n.b. Open stack handlers would be prudent to initialise the default value and button states if this were to be saved for standalone execution. |
n.b. Open stack handlers would be prudent to initialise the default value and button states if this were to be saved for standalone execution. |
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=={{header|Maple}}== |
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For this problem, you will need to open up Maple, go to the Components tab on the left, and insert a Text Area, and 2 Buttons. By right clicking each button, and clicking Component Properties, change one to Increase, and the other to Decrease. Then, click on 'Edit Content Changed Action". In the one labeled increase, type: |
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<lang Maple> |
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Increase(); |
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</lang> |
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In the one labeled Decrease, type: |
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<lang Maple> |
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Decrease(); |
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</lang> |
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Then, by clicking the 2 gears and opening up the start-up commands, enter this: |
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<lang Maple> |
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macro(SP=DocumentTools:-SetProperty, GP=DocumentTools:-GetProperty); |
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with(Maplets[Elements]): |
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SP("Text",value,0); |
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Increase:=proc() |
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SP("Text",value,parse(GP("Text",value))+1); |
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if parse(GP("Text",value))>=10 then |
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SP("Button0", enabled, false); |
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else |
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SP("Button0", enabled, true); |
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end if; |
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if parse(GP("Text",value))<=0 then |
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SP("Button1", enabled, false); |
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else |
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SP("Button1", enabled, true); |
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end if; |
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end proc; |
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Decrease:=proc() |
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SP("Text",value,parse(GP("Text",value))-1); |
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if parse(GP("Text",value))<=0 then |
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SP("Button1", enabled, false); |
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else |
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SP("Button1", enabled, true); |
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end if; |
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if parse(GP("Text",value))>=10 then |
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SP("Button0", enabled, false); |
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else |
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SP("Button0", enabled, true); |
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end if; |
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end proc; |
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</lang> |
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=={{header|Mathematica}}== |
=={{header|Mathematica}}== |
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