/// <summary>
/// Recalculates/Reposition the big/small cicles on resizing
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void RelativeLayout1_SizeChanged(object sender, EventArgs e)
{
if (_rl1.Width <= 0 || _rl1.Height <= 0)
{
return;
}
var minRadi = Math.Min(_rl1.Width * 2, _rl1.Height);
var L = minRadi * RatioBig;
var l = minRadi * RatioSmall;
var x1 = (_rl1.Width - L) / 2;
var y1 = (_rl1.Height - L) / 2;
var c1 = BoundsConstraint.FromExpression((Expression <Func <Rectangle> >)(() => new Rectangle(x1, y1, L, L)));
RelativeLayout.SetBoundsConstraint(_circleView, c1);
var x2 = (_rl1.Width - l) / 2;
var y2 = (_rl1.Height - L) / 2 - l + OverlapSize;
var c2 = BoundsConstraint.FromExpression((Expression <Func <Rectangle> >)(() => new Rectangle(x2, y2, l, l)));
RelativeLayout.SetBoundsConstraint(_circleUp, c2);
var x3 = (_rl1.Width - l) / 2;
var y3 = (_rl1.Height + L) / 2 - OverlapSize;
var c3 = BoundsConstraint.FromExpression((Expression <Func <Rectangle> >)(() => new Rectangle(x3, y3, l, l)));
RelativeLayout.SetBoundsConstraint(_circleDown, c3);
_rl1.ForceLayout();
}
/// <summary>
/// Update the UI controls position/size when the page layout/size changes
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnRootViewSizeChanged(object sender, EventArgs e)
{
var w = RLRoot.Width * 3 / 10;
var h = w;
if (w <= 0)
{
return;
}
var x1 = (RLRoot.Width - w) / 2;
var y1 = RLRoot.Height / 3 - h;
var c1 = BoundsConstraint.FromExpression((Expression <Func <Rectangle> >)(() => new Rectangle(x1, y1, w, h)));
RelativeLayout.SetBoundsConstraint(BtnPumpSession, c1);
var x2 = RLRoot.Width / 1.7 - w - w / 2;
var y2 = RLRoot.Height / 2 - h / 1.1;
var c2 = BoundsConstraint.FromExpression((Expression <Func <Rectangle> >)(() => new Rectangle(x2, y2, w, h)));
RelativeLayout.SetBoundsConstraint(BtnFeedSession, c2);
var x3 = RLRoot.Width / 2.3 + w / 2;
var y3 = RLRoot.Height / 2 - h / 1.1;
var c3 = BoundsConstraint.FromExpression((Expression <Func <Rectangle> >)(() => new Rectangle(x3, y3, w, h)));
RelativeLayout.SetBoundsConstraint(BtnNurseSession, c3);
RLRoot.ForceLayout();
}
/// <summary>
/// Update the UI controls position/size when the page layout/size changes
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ONRL1_SizeChanged(object sender, EventArgs e)
{
var W = _rl1.Width * 2.93 / 10;
var H = W;
if (W <= 0)
{
return;
}
var x1 = (_rl1.Width - W) / 2;
var y1 = 16;
var c1 = BoundsConstraint.FromExpression((Expression <Func <Rectangle> >)(() => new Rectangle(x1, y1, W, H)));
RelativeLayout.SetBoundsConstraint(BtnPumpSession, c1);
var w = _rl1.Width * 2.56 / 10;
var h = w;
var x2 = x1 - w - 14;
var y2 = y1 + H / 2 + 12;
var c2 = BoundsConstraint.FromExpression((Expression <Func <Rectangle> >)(() => new Rectangle(x2, y2, w, h)));
RelativeLayout.SetBoundsConstraint(BtnFeedSession, c2);
var x3 = x1 + W + 14;
var y3 = y2;
var c3 = BoundsConstraint.FromExpression((Expression <Func <Rectangle> >)(() => new Rectangle(x3, y3, w, h)));
RelativeLayout.SetBoundsConstraint(BtnNurseSession, c3);
_rl1.ForceLayout();
}
private void SetDisplayEditButton(bool bWidthVisible)
{
if (bWidthVisible)
{
double dX = (this.Width / 2) + ((Kataview.X + Kataview.WidthRequest) / 2) - Editsentence.Width;
double dY = (this.Height / 2) + ((Kataview.Y + Kataview.HeightRequest) / 2) - Editsentence.Height;
RelativeLayout.SetBoundsConstraint(Editsentence,
BoundsConstraint.FromExpression(
() => new Rectangle(
dX,
dY,
Editsentence.Width,
Editsentence.Height),
null));
}
else
{
double dX = (this.Width / 2) + ((Kataview.X + Kataview.WidthRequest) / 2) - Editsentence.Width;
double dY = (this.Height / 2) + ((Kataview.Y + Kataview.HeightRequest) / 2) - (Editsentence.Height) - 5;
RelativeLayout.SetBoundsConstraint(Editsentence,
BoundsConstraint.FromExpression(
() => new Rectangle(
dX,
dY,
Editsentence.Width,
Editsentence.Height),
null));
}
}
//TODO Implement shape classes (Rectangle done)
static void Initialize()
{
deltaClock = new Clock();
_window.MouseButtonPressed += Input.onMousePressed;
_window.MouseButtonReleased += Input.onMouseRelease;
_window.MouseMoved += Input.onMouseMove;
_window.Closed += Input.onWindowClose;
deltaClock.Restart();
windowBounds = new BoundsConstraint(new Rect(0, 0, 800, 600), 0.3f);
Vector2f[] rect = { new Vector2f(25, 25), new Vector2f(125, 25), new Vector2f(125, 125), new Vector2f(25, 125) };
Vector2f[] triangle = { new Vector2f(25, 25), new Vector2f(25, 125), new Vector2f(125, 125) };
Test = new Rectangle(rect.Select(x => new PointMass(x)).ToArray());
Test2 = new Triangle(triangle.Select(x => new PointMass(x)).ToArray());
//TODO Attempt multithreading constraint solving
/*
* PointMass TestOne = new PointMass(new Vector2f(25, 25));
* PointMass TestTwo = new PointMass(new Vector2f(125, 25));
* PointMass TestThree = new PointMass(new Vector2f(125, 125));
* PointMass TestFour = new PointMass(new Vector2f(25, 125));
*
*
* PointMass TestThree = new PointMass(new Vector2f(225, 200));
*
* PointMass TestFour = new PointMass(new Vector2f(150, 400));
* PointMass TestFive = new PointMass(new Vector2f(300, 400));
* PointMass TestSix = new PointMass(new Vector2f(225, 200));
* PointMass TestSeven = new PointMass(mousePos);
*
*
* RodConstraint TestRod2 = new RodConstraint(TestTwo, TestThree, 100);
* RodConstraint TestRod3 = new RodConstraint(TestThree, TestOne, 100);
* RodConstraint TestRod4 = new RodConstraint(TestFour, TestFive, 50);
* RodConstraint TestRod5 = new RodConstraint(TestFive, TestSix, 50);
* RodConstraint TestRod6 = new RodConstraint(TestSix, TestFour, 50);
* RodConstraint TestRod7 = new RodConstraint(TestSeven, TestOne, 50);
*
*
* RodConstraint TestRod = new RodConstraint(TestOne, TestTwo, 100);
* RodConstraint TestRod2 = new RodConstraint(TestTwo, TestThree, 100);
* RodConstraint TestRod3 = new RodConstraint(TestThree, TestFour, 100);
* RodConstraint TestRod4 = new RodConstraint(TestFour, TestOne, 100);
* double hypotenuse = Math.Sqrt((100 * 100) * 2);
* RodConstraint TestRod5 = new RodConstraint(TestOne, TestThree, hypotenuse);
* RodConstraint TestRod6 = new RodConstraint(TestFour, TestTwo, hypotenuse);
*/
Constraint.drawAll(true);
//PointMass.drawAll(true);
}
public void Add(View view, Expression <Func <Rectangle> > bounds)
{
if (bounds == null)
{
throw new ArgumentNullException(nameof(bounds));
}
SetBoundsConstraint(view, BoundsConstraint.FromExpression(bounds, fromExpression: true));
base.Add(view);
}
/*
* Hack for rezising and changing position of elements,
* as it's not an operation supported by default
*
* Be sure to call ForceLayout() on the view's parent after rezising element
*/
public void UpdateLayout(double x, double y, double w, double h)
{
var constraint = BoundsConstraint.FromExpression(() => new Rectangle(x, y, w, h), new View[0]);
SetBoundsConstraint(this, constraint);
if (Parent != null && Parent is RelativeLayout)
{
(Parent as RelativeLayout).ForceLayout();
}
}
protected override void OnAdded(View view)
{
BoundsConstraint boundsConstraint = GetBoundsConstraint(view);
if (boundsConstraint == null || !boundsConstraint.CreatedFromExpression)
{
// user probably added the view through the strict Add method.
CreateBoundsFromConstraints(view, GetXConstraint(view), GetYConstraint(view), GetWidthConstraint(view), GetHeightConstraint(view));
}
_childrenInSolveOrder = null;
base.OnAdded(view);
}
static Rectangle SolveView(View view)
{
BoundsConstraint boundsConstraint = GetBoundsConstraint(view);
if (boundsConstraint == null)
{
throw new Exception("BoundsConstraint should not be null at this point");
}
var result = boundsConstraint.Compute();
return(result);
}
public virtual void AddSubview(View view, double x, double y, double w, double h)
{
if (view.Parent == null)
{
Children.Add(view, GetConstraint(x), GetConstraint(y), GetConstraint(w), GetConstraint(h, ConstraintProperty_Height));
}
else
{
var constraint = BoundsConstraint.FromExpression(() => new Rectangle(x, y, w, h), new View[0]);
SetBoundsConstraint(view, constraint);
if (view.Parent is RelativeLayout)
{
(view.Parent as RelativeLayout).ForceLayout();
}
}
}
private void SetLocationArrow(bool bVisible)
{
if (bVisible)
{
IsVisibleBottomArrow(false);
SetDisplayEditButton(true);
RelativeLayout.SetBoundsConstraint(upPrePayImage,
BoundsConstraint.FromExpression(
() => new Rectangle(
relLayout.X + 10,
((relLayout.Height - upPrePayImage.Height) - 10),//(relLayout.Height / 2 - upPrePayImage.Height / 2),
upPrePayImage.Width,
upPrePayImage.Height),
null));
RelativeLayout.SetBoundsConstraint(upNextplayImage,
BoundsConstraint.FromExpression(
() => new Rectangle(
((relLayout.Width - upNextplayImage.Width) - 10),
((relLayout.Height - upPrePayImage.Height) - 10),//(relLayout.Height / 2 - upPrePayImage.Height / 2),
upNextplayImage.Width,
upNextplayImage.Height),
null));
}
else
{
IsVisibleBottomArrow(true);
SetDisplayEditButton(false);
}
RelativeLayout.SetBoundsConstraint(playImage,
BoundsConstraint.FromExpression(
() => new Rectangle(
((relLayout.Width - playImage.Width) - 1.5), //((relLayout.Width - playImage.Width) - 10),
(relLayout.Y + 1.5), //relLayout.Y,//relLayout.Y + 10,
playImage.Width,
playImage.Height),
null));
}
/*
* private async Task SlideIn()
* {
* await this.FadeTo(0);
* var animate = new Animation();
* var slidein = new Animation(callback: ax => this.TranslationY = ax,
* start: Height,
* end: 0,
* easing: Easing.SpringOut);
* animate.Add(0, 1, slidein);
* animate.Commit(this, "SlideIn", length: 1000);
* await this.FadeTo(1);
* }
*
* private async Task SlideOut()
* {
* await this.FadeTo(1);
* var animate = new Animation();
* var slideout = new Animation(callback: ax => this.TranslationY = ax,
* start: 0,
* end: -Height,
* easing: Easing.SpringIn);
* animate.Add(0, 1, slideout);
* animate.Commit(this, "SlideOut", length: 1000);
* await this.FadeTo(0);
* }
*/
protected override void OnSizeAllocated(double width, double height)
{
base.OnSizeAllocated(width, height);
if (width <= 0 || height <= 0)
{
return;
}
RelativeLayout.SetBoundsConstraint(btnTextRecord,
BoundsConstraint.FromExpression(
() => new Rectangle(
relLayout.X + 10,
((relLayout.Height - btnTextRecord.Height) - 10),
btnTextRecord.Width,
btnTextRecord.Height),
null));
this.UpdateChildrenLayout();
}
bool CanSolveView(View view, Dictionary <View, bool> solveTable)
{
BoundsConstraint boundsConstraint = GetBoundsConstraint(view);
var parents = new List <View>();
if (boundsConstraint == null)
{
throw new Exception("BoundsConstraint should not be null at this point");
}
parents.AddRange(boundsConstraint.RelativeTo);
// expressions probably referenced the base layout somewhere
while (parents.Remove(this)) // because winphone does not have RemoveAll...
{
;
}
if (!parents.Any())
{
return(true);
}
for (var i = 0; i < parents.Count; i++)
{
View p = parents[i];
bool solvable;
if (!solveTable.TryGetValue(p, out solvable))
{
throw new InvalidOperationException("Views that have relationships to or from them must be kept in the RelativeLayout.");
}
if (!solvable)
{
return(false);
}
}
return(true);
}
public void Add(View view, Expression <Func <double> > x = null, Expression <Func <double> > y = null, Expression <Func <double> > width = null, Expression <Func <double> > height = null)
{
Func <double> xCompiled = x != null?x.Compile() : () => 0;
Func <double> yCompiled = y != null?y.Compile() : () => 0;
Func <double> widthCompiled = width != null?width.Compile() : () => view.Measure(Parent.Width, Parent.Height, MeasureFlags.IncludeMargins).Request.Width;
Func <double> heightCompiled = height != null?height.Compile() : () => view.Measure(Parent.Width, Parent.Height, MeasureFlags.IncludeMargins).Request.Height;
var parents = new List <View>();
parents.AddRange(ExpressionSearch.Default.FindObjects <View>(x));
parents.AddRange(ExpressionSearch.Default.FindObjects <View>(y));
parents.AddRange(ExpressionSearch.Default.FindObjects <View>(width));
parents.AddRange(ExpressionSearch.Default.FindObjects <View>(height));
BoundsConstraint bounds = BoundsConstraint.FromExpression(() => new Rectangle(xCompiled(), yCompiled(), widthCompiled(), heightCompiled()), fromExpression: true, parents: parents.Distinct().ToArray());
SetBoundsConstraint(view, bounds);
base.Add(view);
}
public App()
{
var label = new Label {
Text = "Test",
HorizontalTextAlignment = TextAlignment.Center,
VerticalTextAlignment = TextAlignment.Center,
BackgroundColor = Color.Silver
};
var layout = new RelativeLayout();
layout.Children.Add(label,
Constraint.Constant(50),
Constraint.Constant(100),
Constraint.Constant(260),
Constraint.Constant(30));
MainPage = new ContentPage {
Content = layout
};
var fwd = true;
layout.Animate("bounce",
(delta) => {
var d = fwd ? delta : 1.0 - delta;
var y = 100.0 + (50.0 * d);
var c = BoundsConstraint.FromExpression((Expression <Func <Rectangle> >)(() => new Rectangle(50, y, 260, 30)), new View [0]);
RelativeLayout.SetBoundsConstraint(label, c);
layout.ForceLayout();
}, 16, 800, Easing.SinInOut, (f, b) => {
// reset direction
fwd = !fwd;
}, () => {
// keep bouncing
return(true);
});
}
public static TBindable SetBoundsConstraint <TBindable>(this TBindable bindable, BoundsConstraint value) where TBindable : BindableObject => bindable.Set(RelativeLayout.BoundsConstraintProperty, value);
public static void UpdateLayout(this View view, double x, double y, double w, double h)
{
var constraint = BoundsConstraint.FromExpression(() => new Rectangle(x, y, w, h), new View[0]);
RelativeLayout.SetBoundsConstraint(view, constraint);
}
/// <summary> /// Sets the bounds constraint of element in RelativeLayout /// </summary> /// <param name="bindable">Bindable.</param> /// <param name="value">Value.</param> public static void SetBoundsConstraint(BindableObject bindable, BoundsConstraint value) => Xamarin.Forms.RelativeLayout.SetBoundsConstraint(bindable, value);
/// <summary>
/// Alternative method for defining constraints within a <see cref="RelativeLayout"/> using <see cref="ExposedConstraint"/>
/// </summary>
/// <param name="relativeLayout"><see cref="RelativeLayout"/> to add the <paramref name="view"/> to.</param>
/// <param name="xConstraint">X constraint.</param>
/// <param name="yConstraint">Y constraint.</param>
/// <param name="widthConstraint">Width constraint.</param>
/// <param name="heightConstraint">Height constraint.</param>
public static void SetConstraints(this View view, RelativeLayout relativeLayout,
ExposedConstraint xConstraint = null, ExposedConstraint yConstraint = null,
ExposedConstraint widthConstraint = null, ExposedConstraint heightConstraint = null)
{
var parents = new List <View>();
Func <double> x;
if (xConstraint != null)
{
x = () => xConstraint.Compute(relativeLayout);
if (xConstraint.RelativeTo != null)
{
parents.AddRange(xConstraint.RelativeTo);
}
}
else
{
x = () => 0;
}
Func <double> y;
if (yConstraint != null)
{
y = () => yConstraint.Compute(relativeLayout);
if (yConstraint.RelativeTo != null)
{
parents.AddRange(yConstraint.RelativeTo);
}
}
else
{
y = () => 0;
}
Func <double> width;
if (widthConstraint != null)
{
width = () => widthConstraint.Compute(relativeLayout);
if (widthConstraint.RelativeTo != null)
{
parents.AddRange(widthConstraint.RelativeTo);
}
}
else
{
width = () => view.Measure(relativeLayout.Width, relativeLayout.Height, MeasureFlags.IncludeMargins).Request.Width;
}
Func <double> height;
if (heightConstraint != null)
{
height = () => heightConstraint.Compute(relativeLayout);
if (heightConstraint.RelativeTo != null)
{
parents.AddRange(heightConstraint.RelativeTo);
}
}
else
{
height = () => view.Measure(relativeLayout.Width, relativeLayout.Height, MeasureFlags.IncludeMargins).Request.Height;
}
BoundsConstraint bounds = BoundsConstraint.FromExpression(() => new Rectangle(x(), y(), width(), height()), parents.Distinct().ToArray());
RelativeLayout.SetBoundsConstraint(view, bounds);
}
public static void SetBoundsConstraint(BindableObject bindable, BoundsConstraint value)
{
bindable.SetValue(BoundsConstraintProperty, value);
}
void CreateBoundsFromConstraints(View view, Constraint xConstraint, Constraint yConstraint, Constraint widthConstraint, Constraint heightConstraint)
{
var parents = new List <View>();
Func <double> x;
if (xConstraint != null)
{
x = () => xConstraint.Compute(this);
if (xConstraint.RelativeTo != null)
{
parents.AddRange(xConstraint.RelativeTo);
}
}
else
{
x = () => 0;
}
Func <double> y;
if (yConstraint != null)
{
y = () => yConstraint.Compute(this);
if (yConstraint.RelativeTo != null)
{
parents.AddRange(yConstraint.RelativeTo);
}
}
else
{
y = () => 0;
}
Func <double> width;
Func <double> height = null;
if (widthConstraint != null)
{
width = () => widthConstraint.Compute(this);
if (widthConstraint.RelativeTo != null)
{
parents.AddRange(widthConstraint.RelativeTo);
}
}
else
{
width = () => view.Measure(Width, heightConstraint != null ? height() : Height, MeasureFlags.IncludeMargins).Request.Width;
}
if (heightConstraint != null)
{
height = () => heightConstraint.Compute(this);
if (heightConstraint.RelativeTo != null)
{
parents.AddRange(heightConstraint.RelativeTo);
}
}
else
{
height = () => view.Measure(widthConstraint != null ? width() : Width, Height, MeasureFlags.IncludeMargins).Request.Height;
}
BoundsConstraint bounds = BoundsConstraint.FromExpression(() => new Rectangle(x(), y(), width(), height()), parents.Distinct().ToArray());
SetBoundsConstraint(view, bounds);
}
