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added possible element wobble

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This commit is contained in:
Ellpeck 2019-08-20 21:35:53 +02:00
parent 407f214f29
commit 72b473dc1d
2 changed files with 35 additions and 6 deletions
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24
Demos/UiDemo.cs
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@ -134,6 +134,13 @@ namespace Demos {
root.AddChild(new Paragraph(Anchor.AutoLeft, 1, paragraph => "Slider is at " + (slider.CurrentValue * 100).Floor() + "%") {PositionOffset = new Vector2(0, 1)});
root.AddChild(slider);
// This button uses a coroutine from my Coroutine NuGet package (which is included with MLEM.Startup)
// but the important thing it does is change its visual scale and offset (check the method below for more info)
root.AddChild(new Button(Anchor.AutoCenter, new Vector2(0.5F, 10), "Wobble", "This button wobbles around visually when clicked, but this doesn't affect its actual size and positioning") {
OnClicked = (element, button) => CoroutineHandler.Start(this.WobbleButton(element)),
PositionOffset = new Vector2(0, 1)
});
// Below are some querying examples that help you find certain elements easily
var children = root.GetChildren();
@ -152,6 +159,23 @@ namespace Demos {
Console.WriteLine($"The root has {autoWidthChildren.Count()} auto-width children, {autoWidthButtons.Count()} of which are buttons");
}
// This method is used by the wobbling button (see above)
// Note that this particular example makes use of the Coroutine package
private IEnumerator<Wait> WobbleButton(Element button) {
var counter = 0F;
while (counter < 10) {
// The imporant bit is that it changes its added display scale and offset, allowing the button to still maintain the
// correct position and scaling for both anchoring and interacting purposes, but to show any kind of animation visually
// This could be useful, for example, to create a little feedback effect to clicking it where it changes size for a second
button.AddedDisplayScale = new Vector2((float) Math.Sin(counter));
button.AddedDisplayOffset = new Vector2((float) Math.Sin(counter / 2) * 4, 0);
counter += 0.1F;
yield return new WaitSeconds(0.01F);
}
button.AddedDisplayScale = Vector2.Zero;
button.AddedDisplayOffset = Vector2.Zero;
}
protected override void DoDraw(GameTime gameTime) {
this.GraphicsDevice.Clear(Color.CornflowerBlue);
base.DoDraw(gameTime);

15
MLEM.Ui/Elements/Element.cs
View file

@ -74,6 +74,10 @@ namespace MLEM.Ui.Elements {
}
}
public Point ScaledChildPadding => this.childPadding.Multiply(this.Scale);
public Vector2 AddedDisplayOffset;
public Point ScaledDisplayOffset => (this.AddedDisplayOffset * this.Scale).ToPoint();
public Vector2 AddedDisplayScale;
public Point ScaledDisplayScale => (this.AddedDisplayScale * this.Scale).ToPoint();
public MouseClickCallback OnClicked;
public GenericCallback OnSelected;
@ -123,7 +127,8 @@ namespace MLEM.Ui.Elements {
public Rectangle DisplayArea {
get {
var padded = this.Area;
padded.Location += this.ScaledPadding;
padded.Inflate(this.ScaledDisplayScale.X, this.ScaledDisplayScale.Y);
padded.Location += this.ScaledPadding + this.ScaledDisplayOffset;
padded.Width -= this.ScaledPadding.X * 2;
padded.Height -= this.ScaledPadding.Y * 2;
return padded;
@ -358,23 +363,23 @@ namespace MLEM.Ui.Elements {
public IEnumerable<Element> GetChildren(Func<Element, bool> condition = null, bool regardChildrensChildren = false) {
foreach (var child in this.Children) {
if (condition == null || condition(child))
yield return child;
if (regardChildrensChildren) {
foreach (var cc in child.GetChildren(condition, true))
yield return cc;
}
if (condition == null || condition(child))
yield return child;
}
}
public IEnumerable<T> GetChildren<T>(Func<T, bool> condition = null, bool regardChildrensChildren = false) where T : Element {
foreach (var child in this.Children) {
if (child is T t && (condition == null || condition(t)))
yield return t;
if (regardChildrensChildren) {
foreach (var cc in child.GetChildren(condition, true))
yield return cc;
}
if (child is T t && (condition == null || condition(t)))
yield return t;
}
}