I am working on a Chart Control,
I need to implement the Chart Snapshot feature for capturing a vector based image in high quality of Curves and Texts, in any requested size.
Can anyone suggest me any solution or a pointer to resolve this problem.
Any kind of help in deeply appreciated.
If you have to save your image in a vector format you can using tracing. Potrace is an open source bitmap-to-vector tracer library (but considers that bitmap tracing is imperfect). Also considers that wpf is linked closely with XAML, a vector graphics markup languages, so you may want convert raster graphics to XAML (though Charles Petzold you can't embed a bitmap in a XAML file)
If you need to draw a vector image you can use the Shape element that provides a base class for shape elements, such as Ellipse, Polygon, and Rectangle; and add the shape as Panel child. If you are dealing with thousands of shape I suggest to use the DrawingVisual class, a visual object that can be used to render vector graphics on the screen, and its RenderOpen method.
To zoom you have to work with transformations, in particular ScaleTrasnform and apply the transformation to your panel or to your shapes.
Hope this help.
You can take a look at XamlToy but I have not already try it.
http://xamltoys.codeplex.com/
Related
I have created a box in X3D but i want to curve the top right and left corners of the box.
Any ideas on how? At the moment i have the code for the box only.
I cannot find much on the net about simple shape manipulation.
Thanks
You can't do it manually, directly in X3D.
You have to use a software like Blender or 3DS Max to create non-primitive shapes (more complex shapes than cubes, spheres, cylinders and so on.) There you have all kinds of functions that would change your object and then you can export it in several formats, including X3D.
Take a look at the attached pic, I need to mimic the grey irregular polygon header at the top of the form. If it wasn't for the angled portion on the right-hand side, it would be straightforward. What is the best method to create it? Can this be created in XAML? Should I use an image? Any pointers are greatly appreciated.
This can easily be done via the standard drawing capabilities in XAML. See Shapes and Basic Drawing for details on making custom shapes.
As you can see in the link, I have two elements: first is image element which is taken from camera (using EmguCV) and the other one is viewport3d which renders 3d object. I also include 2d object (see the rectangle).
When I run my program I see this.
Yes indeed, the object (hand) will be ordered in front of the image.
The question is how to order 2d/3d object behind the hand object? Is it possible to do it using single camera? Just like this one.
Thanks in advance for your answers.
There are two ways of doing it.
Use kinect depth map to find the distance of hand from camera.
Do image processing to detect hand and it's distance.
I think it will be difficult to directly blend WPF UI with camera image.
Try RenderTargetBitmap
http://msdn.microsoft.com/en-us/library/system.windows.media.imaging.rendertargetbitmap.aspx
I am not a real designer and I would like to know if anyone have an idea how can I build the following visual :
The idea is to get 2 rings where inside I will draw secific number of pie represented as "Interactive shape or button". Base on the number of shape, they should cover the whole circle.
In addition to that, I need to be able to interact with each pie shape, and inside and oustide edge of those shape should be a perfect arc based on the circle diameter.
As I am not a perfect designer, how can I represent this visual ?
I was thinking of using a custom panel but then how to draw each panel shape in order that they gets perfect inside and ouside arc and offer interactivity with each of them ?
Thanks for your help
I would appreciate samples as well
Theres actually a Silverlight tutorial on making something exactly like this.
If you didnt want to use that, you could always do it in javascript. Here's an example using Rapheal js
I would recommend looking into WPF Geometry and how you can create custom controls (such as the Circular Gauge Custom Control over on CodeProject) using said Geometry.
I've never created a control quite like what your suggesting, but I would image you would define some form of area that can contain children and style it so that it forms the circular shape you want. Then, adding interactive regions should be as simple as adding controls to standard containers.
Here's a link to a "generic radial panel that can be used to host any items" which subclasses Panel.
I am developing a Maps like application using WPF. I have ~10,000 PathGeometry, Shapes added to the canvas. I have added ScaleTransform and TranslateTransform for zooming and panning controls.
The problem I'm facing is, when I zoom or pan, there is slight lag. Is there a way to organize the data so that I handle only the Shapes that are visible?
Any hints on making it more efficient will be helpful and appreciated.
What kind f stuff are you putting on the canvas? If using pathGeometry, are you enclosing them in Path class? If so, Path has FrameworkElement in its superclass hierarchy, which is responsible for massive performance loss.
Take a look at my question here. Although it is about Shape class, but the reason of performance degradation is the same, FrameworkElement.
If you are doing so, the solution is to use PathGeometry instead, and enclose it in DrawingContext of a DrawingVisual using DrawingContext.DrawGeometry() method.
Here are some links that should help.
Path Geometry
DrawingContext.DrawGeometry()
Optimizing Performance: 2D Graphics and Imaging
And draw the shapes yourself, using combination of lines, and other things provided by classes derived from Geometry class (ArcGeometry, PathGeometry etc).
This should help.
If you want the ultimate in performance for immediate drawing in WPF, then check out WriteableBitmapEx. This is an excellent open source library, which I recently contributed to. it provides GDI-like drawing capabilities on WriteableBitmap and is compatible with Windows Phone, WPF and Silverlight. The API is simple, you get blitting, polygons, lines and simple shapes etc... You won't get datatemplates and gradient brushes however.