I make group of rectangles with different opacity value and add these rectangles to Grid in WindowsPhone:
var grid=new Grid();
grid.Width = grid.Height = 200;
var rectanglesCount=55;
var rectangleSizeStep = grid.Height / rectanglesCount;
var opacityStep = 1.0 / rectanglesCount
var rectangleSize = grid.Height;
var opacity = 0.0;
for (int i = 0; i <= rectanglesCount; i++)
{
Rectangle rect = new Rectangle();
rect.Height = rect.Width = rectangleSize;
rect.VerticalAlignment = VerticalAlignment.Center;
rect.HorizontalAlignment = HorizontalAlignment.Center;
rect.Fill = new SolidColorBrush(Colors.Yellow);
rect.Opacity = opacity;
opacity += opacityStep;
rectangleSize -= rectangleSizeStep;
grid.Children.Add(rect);
}
I can see in grid following picture:
After I try to save this group of rectangles to WriteableBitmap and show as Image:
var img=new Image();
var wrBit = new WriteableBitmap(grid, null);
img.Source=wrBit;
And I see picture:
What happend with opacity on top and left edges?
How to correctly save group of Rectangles?
Need to use Canvas instead Grid control for group of rectangles:
var canvas=new Canvas();
canvas.Width = canvas.Height = 200;
var rectanglesCount=55;
var rectangleSizeStep = canvas.Height / rectanglesCount;
var opacityStep = 1.0 / rectanglesCount
var rectangleSize = canvas.Height;
var opacity = 0.0;
var rectMargin = 0.0;
for (int i = 0; i <= rectanglesCount; i++)
{
Rectangle rect = new Rectangle();
rect.Height = rect.Width = rectangleSize;
rect.Margin=new Thickness(rectMargin,rectMargin,0,0);
rectMargin += rectangleSizeStep/2;
rect.Fill = new SolidColorBrush(Colors.Yellow);
rect.Opacity = opacity;
opacity += opacityStep;
rectangleSize -= rectangleSizeStep;
canvas.Children.Add(rect);
}
and save Canvas as WriteableBitmap:
var img=new Image();
var wrBit = new WriteableBitmap(canvas, null);
img.Source=wrBit;
Problem was solved!
Related
I have an application that breaks the image when the screen size changes
Below is the screen
Where can the mistake be? What can cause this situation? I do not even know where to look because it is not a permanent error only once and once is gone
This is how I load items with a line and number per view:
<ItemsControl ItemsSource="{Binding ConnectorsGridsHorizontal, Mode=TwoWay}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<Grid />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
Function drawing 1 element:
public Grid DrawConnector1(Thickness margin, int nr, bool rotate, bool rightSide)
{
Grid grid = new Grid();
grid.Margin = margin;
grid.HorizontalAlignment = HorizontalAlignment.Left;
grid.Width = S10;
grid.Height = 128;
grid.VerticalAlignment = System.Windows.VerticalAlignment.Center;
Line line = new Line();
line.X1 = S10HALF;
line.X2 = S10HALF;
line.Y1 = 0;
line.Y2 = 128;
line.StrokeDashArray = new System.Windows.Media.DoubleCollection() { 4, 2, 1, 2 };
line.Stroke = System.Windows.Media.Brushes.Green;
line.StrokeThickness = 4;
grid.Children.Add(line);
Grid inGrid = new Grid();
inGrid.Width = S10;
inGrid.Height = HF;
inGrid.Background = System.Windows.Media.Brushes.Black;
grid.Children.Add(inGrid);
Border br = new Border();
br.BorderThickness = new Thickness(0);
br.CornerRadius = new CornerRadius(10);
br.Background = System.Windows.Media.Brushes.White;
br.Margin = new Thickness(-10, -10, -10, -10);
br.Width = 20;
br.Height = 20;
br.VerticalAlignment = rightSide ? VerticalAlignment.Top : VerticalAlignment.Bottom;
br.RenderSize = new System.Windows.Size(br.ActualWidth + 1, br.ActualHeight + 1);
if (SelectedConnector + 1 == nr) br.Background = System.Windows.Media.Brushes.Green;
else br.Background = System.Windows.Media.Brushes.White;
if (DisableGreenMark) br.Background = System.Windows.Media.Brushes.White;
TextBlock txtBlock = new TextBlock();
txtBlock.FontSize = 16;
txtBlock.Text = nr.ToString();
txtBlock.Foreground = new SolidColorBrush(Colors.Black);
txtBlock.VerticalAlignment = VerticalAlignment.Center;
txtBlock.HorizontalAlignment = HorizontalAlignment.Center;
br.Child = txtBlock;
grid.Children.Add(br);
Binding b = new Binding("S60_20");
b.Mode = BindingMode.Default;
grid.SetBinding(Canvas.TopProperty, b);
return grid;
}
GIF:
I'm also using SnapsToDevicePixels="true"
To start with, try doing this:
br.HorizontalAlignment = HorizontalAlignment.Stretch;
br.Margin = new Thickness(0, 0, 0, 0);
Do not use margin with a negative value
Stretch will provide you with an element extension
Side cut is probably caused by too narrow a strip for the element:
You have:
grid.Width = S10;
line.X1 = S10HALF;
line.X2 = S10HALF;
This indicates that you have the width set to probably 10
and Here you have set to 20
br.Width = 20;
br.Height = 20;
I also suggest changing here:
grid.Width = S10 * 2;
line.X1 = S10HALF * 2;
line.X2 = S10HALF * 2;
I'm trying to print a Image in Landscape mode in Silverlight.
I found a great example here. Where most of the code comes from. The code worked perfectly as expected. When I changed the Line to an Image it failed.
Code
Canvas OuterCanvas = new Canvas();
/* a container for everything that will print */
Border OuterBorder = new Border()
{
BorderThickness = new Thickness(3),
BorderBrush = new SolidColorBrush(Colors.Red),
Margin = new Thickness(10)
};
double Width = e.PrintableArea.Width - OuterBorder.Margin.Left - OuterBorder.Margin.Right;
double Height = e.PrintableArea.Height - OuterBorder.Margin.Top - OuterBorder.Margin.Bottom;
/* NOTE: We're trying to force landscape, so swop the width and height */
OuterBorder.Width = Height;
OuterBorder.Height = Width;
/* on portrait, this line goes down (leave the printer settings, we're trying to force landscape) */
Line Line = new Line()
{
X1 = OuterBorder.Width / 2,
Y1 = 0,
X2 = OuterBorder.Width / 2,
Y2 = OuterBorder.Height,
Stroke = new SolidColorBrush(Colors.Blue),
StrokeThickness = 3
};
//
// Here is where I changed the Line to an Image
//
OuterBorder.Child = imageElementInXaml; //Line;
OuterCanvas.Children.Add(OuterBorder);
/* rotate 90 degrees, and move into place */
var transformGroup = new TransformGroup();
transformGroup.Children.Add(new RotateTransform() { Angle = 90 });
transformGroup.Children.Add(new TranslateTransform() { X = e.PrintableArea.Width });
OuterBorder.RenderTransform = transformGroup;
e.PageVisual = OuterCanvas;
e.HasMorePages = false;
I know that a Border can only contain 1 element in which I have done so, and when I printed the image on its own without trying to make it landscape this worked too. So why wont it work when I simply replace the Line with the image Element
So since posting this I found some code (cant remember where now) that has helped me get the printing working. Its not as clean as I would have liked but it works.
void pd_PrintPage(object sender, PrintPageEventArgs e)
{
Image image = new Image();
image.Source = imgPlayer.Source;
//This is important
image.Stretch = Stretch.Uniform;
// Find the full size of the page
Size pageSize = new Size(e.PrintableArea.Width + e.PageMargins.Left + e.PageMargins.Right, e.PrintableArea.Height + e.PageMargins.Top + e.PageMargins.Bottom);
var MARGIN= 10;
// Get additional margins to bring the total to MARGIN (= 96)
Thickness additionalMargin = new Thickness
{
Left = Math.Max(0, MARGIN - e.PageMargins.Left),
Top = Math.Max(0, MARGIN - e.PageMargins.Top),
Right = Math.Max(0, MARGIN - e.PageMargins.Right),
Bottom = Math.Max(0, MARGIN - e.PageMargins.Bottom)
};
// Find the area for display purposes
Size displayArea = new Size(e.PrintableArea.Width - additionalMargin.Left - additionalMargin.Right, e.PrintableArea.Height - additionalMargin.Top - additionalMargin.Bottom);
bool pageIsLandscape = displayArea.Width > displayArea.Height;
bool imageIsLandscape = image.ActualWidth > image.ActualHeight;
double displayAspectRatio = displayArea.Width / displayArea.Height;
double imageAspectRatio = (double)image.ActualWidth / image.ActualHeight;
double scaleX = Math.Min(1, imageAspectRatio / displayAspectRatio);
double scaleY = Math.Min(1, displayAspectRatio / imageAspectRatio);
// Calculate the transform matrix
MatrixTransform transform = new MatrixTransform();
if (pageIsLandscape == imageIsLandscape)
{
// Pure scaling
transform.Matrix = new Matrix(scaleX, 0, 0, scaleY, 0, 0);
}
else
{
// Scaling with rotation
scaleX *= pageIsLandscape ? displayAspectRatio : 1 / displayAspectRatio;
scaleY *= pageIsLandscape ? displayAspectRatio : 1 / displayAspectRatio;
transform.Matrix = new Matrix(0, scaleX, -scaleY, 0, 0, 0);
}
Image image2 = new Image
{
Source = image.Source,
Stretch = Stretch.Fill,
Width = displayArea.Width,
Height = displayArea.Height,
RenderTransform = transform,
RenderTransformOrigin = new Point(0.5, 0.5),
HorizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment = VerticalAlignment.Center,
Margin = additionalMargin,
};
Border border = new Border
{
Child = image,
};
e.PageVisual = border;
}
I want to animate retangle with using AnimationPoint.
How can i do it?
P.S.
I searhed in google, but did not find what i need.
I try this :
private void drawRect()
{
var d = new Grid();
var moveTranc = new TranslateTransform() { X = 1,Y = 1 };
var e2 = new Rectangle()
{
Stroke = new SolidColorBrush(System.Windows.Media.Color.FromArgb(255, 0, 200, 0)),
RenderTransform = moveTranc,
RadiusX = 100,
RadiusY = 100,
RenderTransformOrigin = new Point(0.5f,0.5f),
};
var pointAnimation = new PointAnimation()
{
Duration = new Duration(TimeSpan.FromSeconds(2)),
From = new Point(e2.RadiusX,e2.RadiusY),
To = new Point(450,450)
};
var storyBoard = new Storyboard();
storyBoard.RepeatBehavior = RepeatBehavior.Forever;
storyBoard.Children.Add(pointAnimation);
Storyboard.SetTarget(pointAnimation, e2);
Storyboard.SetTargetProperty(pointAnimation, new PropertyPath("(UIElement.RenderTransform).(TranslateTransform.X).(TranslateTransform.Y)"));
d.Children.Add(e2);
ContentPanel.Children.Add(d);
storyBoard.Begin();
}
I found any variant of animating rectangle with using double animation
Rectangle myRectangle;
Storyboard sb;
//creating rectangle
myRectangle = new Rectangle();
myRectangle.Width = 200;
myRectangle.Height = 200;
Color myColor = Color.FromArgb(255, 255, 0, 0);
SolidColorBrush myBrush = new SolidColorBrush();
myBrush.Color = myColor;
myRectangle.Fill = myBrush;
// Create the transform
TranslateTransform moveTransform = new TranslateTransform();
moveTransform.X = 0;
moveTransform.Y = 0;
myRectangle.RenderTransform = moveTransform;
// Add the rectangle to the tree.
if (!LayoutRoot.Children.Contains(myRectangle)) LayoutRoot.Children.Add(myRectangle);
// Create a duration of 2 seconds.
Duration duration = new Duration(TimeSpan.FromSeconds(1.0));
// Create two DoubleAnimations and set their properties.
DoubleAnimation myDoubleAnimationX = new DoubleAnimation();
sb = new Storyboard();
sb.Duration = duration;
sb.Children.Add(myDoubleAnimationX);
Storyboard.SetTarget(myDoubleAnimationX, moveTransform);
Storyboard.SetTargetProperty(myDoubleAnimationX, new PropertyPath("X"));
DoubleAnimation myDoubleAnimationY = new DoubleAnimation();
sb.Children.Add(myDoubleAnimationY);
Storyboard.SetTarget(myDoubleAnimationY, moveTransform);
Storyboard.SetTargetProperty(myDoubleAnimationY, new PropertyPath("Y"));
myDoubleAnimationX.To = 0;
myDoubleAnimationX.From = 340;
myDoubleAnimationY.To = 0;
myDoubleAnimationY.From = 340;
// Make the Storyboard a resource.
if (!LayoutRoot.Resources.Contains("unique_id")) LayoutRoot.Resources.Add("unique_id", sb);
sb.Begin();
So, Basically I'm trying to draw a line between the center of 2 ellipses
And I think this should do it:
Path myPath = new Path();
myPath.Stroke = System.Windows.Media.Brushes.Black;
myPath.StrokeThickness = 4;
myPath.HorizontalAlignment = HorizontalAlignment.Left;
myPath.VerticalAlignment = VerticalAlignment.Center;
EllipseGeometry myEllipseGeometry = new EllipseGeometry();
myEllipseGeometry.Center = new System.Windows.Point((xQuard * 10) + 100, yQuard * 10);
myEllipseGeometry.RadiusX = 2;
myEllipseGeometry.RadiusY = 2;
myPath.Data = myEllipseGeometry;
GraphPanel.Children.Add(myPath);
//if it's not the first point...
if (prevA != 0.0)
{
Path iLine = new Path();
iLine.Stroke = Brushes.Black;
iLine.StrokeThickness = 4;
iLine.HorizontalAlignment = HorizontalAlignment.Left;
myPath.VerticalAlignment = VerticalAlignment.Center;
LineGeometry iLineGeometry = new LineGeometry();
iLineGeometry.StartPoint = myEllipseGeometry.Center;
iLineGeometry.EndPoint = new System.Windows.Point(prevA, prevB);
iLine.Data = iLineGeometry;
GraphPanel.Children.Add(iLine);
}
//Set the previous point(s)
prevA = (xQuard * 10) + 100;
prevB = yQuard * 10;
Now as you can see, I've set the Line's StartPoint = to the first ellipse start point
And Yet....
Why is the Line's start point in the picture not the center of the point on the left?
I think you mean iLine.VerticalAlignment instead of myPath.VerticalAlignment the second time, right?
It won't change the position, the position is fixed at runtime even though i change the value 50 below:
System.Windows.Shapes.Rectangle myRectangle = new System.Windows.Shapes.Rectangle();
mainGrid.Children.Add(myRectangle);
Canvas.SetLeft(myRectangle, 50);
Canvas.SetTop(myRectangle, 50);
myRectangle.Height = 100;
myRectangle.Width = 100;
myRectangle.Stroke = System.Windows.Media.Brushes.LightSteelBlue;
here are the 2 solutions for your problem
1) with a canvas
var myRectangle = new System.Windows.Shapes.Rectangle();
var mainCanvas = new Canvas();
mainGrid.Children.Add(mainCanvas);
mainCanvas.Children.Add(myRectangle);
Canvas.SetLeft(myRectangle, 50);
Canvas.SetTop(myRectangle, 50);
myRectangle.Height = 100;
myRectangle.Width = 100;
myRectangle.Stroke = System.Windows.Media.Brushes.LightSteelBlue;
2) only with your grid
var myRectangle = new System.Windows.Shapes.Rectangle();
mainGrid.Children.Add(myRectangle);
myRectangle.Margin = new Thickness(50, 50, 0, 0);
myRectangle.HorizontalAlignment = HorizontalAlignment.Left;
myRectangle.VerticalAlignment = VerticalAlignment.Top;
myRectangle.Height = 100;
myRectangle.Width = 100;
myRectangle.Stroke = System.Windows.Media.Brushes.LightSteelBlue;