Graham,
For the first action:
Declaration:
// allows user to set the value of the friction coefficient
IBOutlet NSSlider *_frictionSlider;
// displays friction coefficient chosen by the user
IBOutlet NSTextField *_frictionDisplay;
// allows user to set the mass
IBOutlet NSSlider *_massSlider;
// displays the mass chosen by the user
IBOutlet NSTextField *_massDisplay;
// allows the user to set the amount of forces applied to the ball
IBOutlet NSSlider *_forceAppliedSlider;
// displays the amount of force the user wishes to apply
IBOutlet NSTextField *_forceAppliedDisplay;
}
When the sliders are moved:
-(IBAction)changeParameters:(id)sender
{
// user adjusts slider for mass
if([sender tag] == RBS_MassSliderTag)
{
[_massDisplay setFloatValue:[_massSlider floatValue]];
NSLog(@"Mass in changeParameters: %f\n", [_massSlider floatValue]);
}
// user adjusts slider for friction
else if([sender tag] == RBS_FrictionSliderTag)
{
[_frictionDisplay setFloatValue:[_frictionSlider floatValue]];
}
// user adjusts slider for force applied
else
{
[_forceAppliedDisplay setFloatValue:[_forceAppliedSlider floatValue]];
}
}
When the start button is pressed:
// friction
[_simulationView setFrictionCoefficient:[_frictionSlider floatValue]];
// mass
NSLog(@"Mass in startSimulation: %f\n", [_massSlider floatValue]);
[_simulationView setMass:[_massSlider floatValue]];
On Jun 1, 2014, at 8:37 PM, Graham Cox
<[email protected]<mailto:[email protected]>> wrote:
On 2 Jun 2014, at 10:28 am, Peters, Brandon
<[email protected]<mailto:[email protected]>> wrote:
have a slider used to adjust a value. When the slider is moved, an action is
triggered to display the value in a panel. When a start button is pressed,
another action is triggered, and within that action the value of the slider is
ascertained. I have discovered than when calling the second action, the value
of the slider is zero, unlike the value when called from the first action. Is
this expected behavior? How can get the slider to retain its value from the
first called action? Thanks.
This isn't the expected behaviour; sliders and all controls have a value that
they remember constantly. How are you referring to the slider in the second
action? Using an outlet? Is it connected?
Show your code - something else is wrong.
--Graham
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