I was wondering if there is any possible way to position a background image on a button in C# windows forms? I am using Visual Studio 2013, and I noticed that you can use the BackgroundImageLayout but that is very limited. I would like to move the background image around by pixel position, or relative to the button. Kind of like this:
I have been on google for a while now with no luck. If anyone could point me in the right direction, or show my an article to read it would be greatly appreciated. Thank you.
You could use the Paint event (or subclass Button to override OnPaint) to draw the image yourself:
private void myButton_Paint(object sender, PaintEventArgs e)
{
e.Graphics.DrawImage(myImage, myButton.ClientRectangle);
}
You could then use the TextAlign and Padding properties to control the location of the text.
Note that you should not assign the image to the Button's Image or BackgroundImage properties, otherwise .NET will also render the image.
Related
I am working on an assignment right now and was asked to create an app to select an area on image with ability to magnify a part of the image around cursor.
Right now I stuck on the magnifier part. There is a Magnifier control in WPF, but how about UWP? Has anyone had any experience creating magnifier in UWP?
SO far I've found this, but UWP has different API's:
http://csharphelper.com/blog/2015/06/zoom-and-crop-a-picture-in-c/
My logic is:
1. Draw circle around the cursor and re-draw it every time the cursor moves.
2. Take a screenshot (render) specified area around it
3. Magnify the are
4. Fill the circle with the magnified image (Bitmap)
Any tips or suggestions would be much appreciated. Thank you
Draw circle around the cursor and re-draw it every time the cursor moves.
You could register the PointerMoved event for your panel(e.g, Canvas) and get current pointer by using the following method:
private void Canvas_PointerMoved(object sender, PointerRoutedEventArgs e)
{
var pointer = e.GetCurrentPoint(sender as UIElement);
}
And then, you could add a Ellipse on it and set its position by current pointer.
Take a screenshot (render) specified area around it
You could use RenderTargetBitmap class APIs to render specific area.
Magnify the are
You could resize the rendertargetbitmap. Check this thread How to Resize the RenderTargetBitmap.
Fill the circle with the magnified image (Bitmap)
After you get the final rendertargetbitmap, you could use it to make a ImageBrush, then you could specify this ImageBrush to the Ellipse's Fill property like the following:
ellipse.Fill = new ImageBrush() { ImageSource = renderTargetBitmap};
I set background image to form in my project C# winform, but when set Form property to
RightToLeft=Yes and RightToLeftLayout=True
then disappear my background image.
Does anyone help me?
You can paint the image manually, by overriding the OnPaintBackground method of your form:
protected override void OnPaintBackground(PaintEventArgs e)
{
e.Graphics.DrawImage(Properties.Resources.SampleImage,
new Rectangle(Point.Empty, this.ClientSize));
}
By using background image, you have to know that it is not supported by RightToLeftLayout so you cannot use it directly in this case, but that doesn't mean that you can't implement it manually.
MSDN Reference
Owner draw is not supported when RightToLeftLayout is set to Yes. The owner draw events will still occur, but the behavior of any code you author in these events is not defined. Additionally, BackgroundImage, Opacity, TransparencyKey, and the painting events are not supported.
Referece:
[http://msdn.microsoft.com/en-us/library/system.windows.forms.form.righttoleftlayout(v=vs.110).aspx][1]
Look this:
http://msdn.microsoft.com/query/dev12.query?appId=Dev12IDEF1&l=ZH-CN&k=k(System.Windows.Forms.Form.RightToLeftLayout)%3bk(TargetFrameworkMoniker-.NETFramework%2cVersion%3dv4.5)%3bk(DevLang-csharp)&rd=true
http://msdn.microsoft.com/en-us/library/system.windows.forms.control.backgroundimage(v=vs.110).aspx
If you set RightToLeftLayout=True ,you'll not use backgroundimage.
I am developing an application in which user can select an image in a picture box.
After that he can right click on the image and add a user control which will again display an Image along with some text. This user control can be added any number of times.
User can also re-position the user controls as per need.
All this functionality has been implemented and is working fine.
Now, the requirement is to save the Image along with the user control.
Above you can see the complete image which needs to be saved. Back image is the picture box image and the user control (small images with text).
When user will click on save button the image should get saved on his disk as a single image.
This is a windows application developed in C#.
I want to know that whether this functionality can be achieved or not. If yes, then please guide me in the right direction.
If you create a copy of the bitmap then with the Graphics.DrawImage() you can draw those images onto it. You need to calculate the position of those controls.
Look here for DrawImage: http://msdn.microsoft.com/en-us/library/42807xh1.aspx
example:
Bitmap copy = new Bitmap(OriginalBitmap);
Graphics g = Graphics.FromImage(copy);
g.DrawImage(arrowBitmap, new Point(..));
copy.Save(...);
A very simple and straight forward solution exists, has been thought of by Microsoft and includes these steps:
Instead of PictureBox use a Panel and instead of using the Image property of the PictureBox use the BackgroundImage property of the Panel
note: By using also the BackgroundImageLayout property you can quite easily instruct the Panel to stretch, center or zoom the image (I'm presuming the default value which is tile is not a good option in your case)
Instead of placing the other user controls at higher Z order but alongside the previous PictureBox place them inside the Panel
Use the Control.DrawToBitmap method like so:
private void button1_Click(object sender, EventArgs e) {
var bmp = new Bitmap(this.panel1.Width, this.panel1.Height);
this.panel1.DrawToBitmap(bmp, new Rectangle(Point.Empty, bmp.Size));
bmp.Save(#"D:\test.png", ImageFormat.Png);
}
That will result in your controls begin rendered along with the picture:
Furthermore, and if your scenario allows it, you could simply use the DrawToBitmap method with any control which contains all of the actors you wish to render, for instance the actual Form.
I am writting a pin-up board in C# where I need to be able to drag around pieces of paper (notes) on the board. I have made the notes as customcontrols since I needed to be able to write on them as well. The background of the customcontrol (a note) is an image of a piece of paper. When I don't use a backgroundimage, for the board itself, everything works as intended. I am able to drag around the notes (customcontrols with a backgroundimage) just fine - no flickering. When I use a backgroundimage on the board (which I want to do, since a plain color background doesn't cut it for me), I am not able to drag the notes around smoothly anymore. When I start dragging the note disappears and is first redrawn when I stop moving the mouse.
I am using the following code on the panel (in its constructor) where I drag around notes, but it has only sorted out my initial screen flickering issue.
SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw | ControlStyles.UserPaint, true);
The image file used for the background is imported into the projects resources. I have tried to load the image file into a bitmap object and used this object as the backgroundimage of the panel, but that didn't change anything.
Below a link to an image of how a note should look when being dragged:
http://i.stack.imgur.com/9LnKj.jpg
Below an image of how the note actually looks when I start dragging it around:
http://i.stack.imgur.com/x0Lf1.png
Please ask if you need more details to be able to help me solve my issue. Any help and suggestions on what the problem might be is very appreciated! Thanks in advance.
Edit: The size of the note on the second image is dependent on how far I drag it from its initial point. I am able to get the note to disappear completely when I drag it further than the size of it. It gets redrawn when I stop moving the mouse.
Edit: I use the following code for moving around the notes:
private void NoteControl_MouseMove(object sender, MouseEventArgs e)
{
if (_dragme)
{
System.Drawing.Point newLocation = e.Location - mouseOffset;
this.Left += newLocation.X;
this.Top += newLocation.Y;
}
}
Since I have not been able to solve my issue with the custom control disappearing when getting dragged on an imaged background I have decided to create an asp.net version of my project rather than a windows form application. This also prevent the issue with cross platform compatibility. The dragging is now accomplished using jQuery
i am currently learning on webcam based qr code decoder i have taken an example from https://zxingnet.svn.codeplex.com/svn/trunk/Clients/AForgeDemo/ . i have manage to get it working however i have a problem which baffle me. it is regarding to the picture box in my GUI.
the image above is before i press the start/ continue button. the image after is as below
is there any setting in the picture box property which could prevent the picturebox from expanding or do i need to type a source code to. it would be great if anyone could highlight what i need to do to prevent the expending of the picture box. thank you
Set the MaximumSize property of the picture box to however big you want it to be. You can also set MinimumSize while you're at it.
Hey Try This Code on click of Start Button
private void Button1_Click(System.Object sender, System.EventArgs e)
{
// Set the SizeMode property to the StretchImage value. This
// will enlarge the image as needed to fit into
// the PictureBox.
PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
}
Hope it will helps you
Seems like you have to set PictureBox.SizeMode to everithing else than AutoSize.