Component removal with fade effect

Question

Hello,

I need to create a component that is loaded into memory and unloaded using a fading effect.

To load the component, there is no problem, I declared it, with the "Opacity" property set to 0, and used an Int32Effect from 0 to 255 to make it appear while charged into the memory.

My problem is the other way around, before deleting it from memory, I reused my effect (from 255 to 0 this time), but the component is always deleted before the effect is even done.

I tried with the postsignal process to wait for the effect, but in that case, I have the following error message:

[8.11.2018  9:16:19] Runtime Core::Group.Remove (2:3) : Chora exception: 'No view to remove'.

Here is my code for the component removal:

  // If the element is loaded and should not be, then we delete it
else if(!ActiveDisplay && this.Screen_Logo != null)
{
  var slot EffectEnding = this.Effect_ScrOpacity.OnFinished;

    // We set & activate the opacity effect
  this.Effect_ScrOpacity.Outlet = ^this.Screen_Logo.Opacity;
  this.Effect_ScrOpacity.OnFinished = this.Slot_ScrLogoOpacityOff;
  this.Effect_ScrOpacity.Value1 = this.iOpacityMax;
  this.Effect_ScrOpacity.Value2 = this.iOpacityMin;
  this.Effect_ScrOpacity.Enabled = true;

  postsignal EffectEnding;

  //  // The removal of the screen itself will be launched at the end of the effect
    // We remove the logo screen from memory
  Remove(this.Screen_Logo);
  this.Screen_Logo = null;
}

Thank you for the help,

Krzysztof,

Answer 1

Hello Krzysztof,

from the above source code you start the effect and immediately after this step you remove the component without waiting for the end of the effect. My suggestion: from your actual implementation delete the following two rows and put them inside the slot method Slot_ScrLogoOpacityOff:

Remove(this.Screen_Logo);
this.Screen_Logo = null;

Accordingly, the component is deleted not before the effect is finished.

Hopefully it helps you further.

Best regards

Paul Banach