I have a picturebox with some transparency. I found out I can use picturebox.Parent to set the parent image, but it only works when Parent is another picturebox. But what if i want form's background image to be picturebox's parent?
pictureBox1.Parent = PictureBox2; //works fine (of course if there is a pbox2)
pictureBox1.Parent = Form1; //??? magic goes here
If I understood well, you want that your background would be transparent. If so, use:
pictureBox1.BackColor = Color.Transparent;
Are you trying to use an image with transparency as the background to your form? If so, you can't do that you have to use a transparency key.
what you are trying to do above works this way but I don't know what that would accomplish...
Form1 theForm = new Form1();
pictureBox1.Parent = theForm;
Related
I am very new to c# and windows form.
What I am trying is to add a PictureBox to a windows form and display an animated .gif image before I display the data in the form.
Here is the code for the PictureBox :
private System.Windows.Forms.PictureBox pictureBox1;
//
// pictureBox1
//
this.pictureBox1.BackColor = System.Drawing.SystemColors.AppWorkspace;
this.pictureBox1.Image = ((System.Drawing.Image)(resources.GetObject("pictureBox1.Image")));
this.pictureBox1.Location = new System.Drawing.Point(374, 442);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(16, 16);
this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize;
this.pictureBox1.TabIndex = 19;
this.pictureBox1.TabStop = false;
this.pictureBox1.Visible = false;
Now, on a button click the gif image should be loaded in the picture box . The code for that goes like this :
private void scanButton_Click(object sender, EventArgs e)
{
pictureBox1.Visible = true;
pictureBox1.Refresh();
}
Now, when I click the button "Scan Button", the image becomes visible,but the animation is not working.
Please can anyone help me what is happening here ?
Thanks!
For your .gif animation to work, your main (UI) thread should be free. If you are performing any process on main thread then you will not get animation effect.
From your question, it seems like you are performing Scanning operation on click of button. That may be the problem.
To get rid of this problem, you will have to make sure that your main thread is free and any operation (like Scanning) should be on separate thread.
Just assign the path to the image in ImageLocation.
pictureBox1.ImageLocation = "C:\\throbber.gif";
The PictureBox will understand that it's an animated image and play it. Disabling the PictureBox or the Form will stop the animation from playing.
If you really need to use picture box you can iterate over a collection of images. But i strongly recommend using WebBrowser (mind it is basically IE)
This should help you with all animations using windows forms
Simple animation using C#/Windows Forms
How can I retrieve a form's stretched image? When I use MyForm.BackgroundImage it gives me the original image, but not the stretched image that is being displayed on the form.
If I cannot get the image, can I recreate the resulting image from BackgroundImageLayout = Stretch?
Why I want to do this:
I have a control that does not allow transparency. In order to fake transparency I take the background image and create an image for the section that the control covers. This works well until I set the BackGroundImageLayout to anything other than none.
Any help is greatly appreciated, thanks.
You can retrieve/re-create the stretched form background image like so:
private Bitmap getFormBackgroundImage()
{
Bitmap bmp = new Bitmap(this.ClientSize.Width, this.ClientSize.Height);
using (Graphics g = Graphics.FromImage(bmp))
{
g.DrawImage(this.BackgroundImage,
new Rectangle(0, 0, bmp.Width, bmp.Height));
}
return bmp;
}
Then you can crop a portion of it to use as the child control's background.
Try this :
a) Set the background image of the form (Base Control).
this.BackgroundImage = <image>;
b) Create a child control and drop it over over your base control.
c) Set the dock of your child control to Fill.
this.childControl.Dock = DockStyle.Fill;
d) In the base control constructor , set the background image for the child control as the image of the base control. Like this:
childControl.BackgroundImage = this.BackgroundImage;
e) Set the background image layout of the child control to strech.
childControl.BackgroundImageLayout = ImageLayout.Stretch;
This would make your child control appear as transparent. Hope it solves your problem.
Am creating a windows application (win form). I want to create a UI something like the attached image.
Am using a form (called CalendarForm),that will contains the right side controls (blue background portion)
The issue now am facing is, when am using MDI and setting CalendarForm as a child. Then I am not able to sent the opacity to show the MDI parent form background.
Am using below mentioned code in MDIForm_Load method
this.WindowState = FormWindowState.Maximized;
CalendarForm calForm = new CalendarForm();
calForm.BackColor = Color.FromArgb(33, 66, 131);
calForm.Opacity = 0.5d;
calForm.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
calForm.MdiParent = this;
calForm.Show();
Is there any way to achieve my requirement ?
Using this Custom Month Calendar created by Patrik Bohman ,we can make the calendar background transparent.
To make a WinForm transparent you could use the opacity property
calForm.Opacity = 0.5;
I want to draw the Labels on PictureBoxes but should be transparent background .
This is my code : `
Labels[i].Location = new Point(0, 0);
Labels[i].Size = new Size(13, 13);
Labels[i].BackColor = Color.Transparent;
Labels[i].ForeColor = Color.Blue;
Invoke(new MethodInvoker(delegate { Panels.Controls.Add(Pictures[i]); }));
Invoke(new MethodInvoker(delegate { Panels.Controls.Add(Labels[i]); }));
I'am drawing my Pictures fine, Labels too ... But I get the Labels under the Pictures (I can see each label when I drag the Picture out of his place)
so I want to know , how I can put them in Front with Transparent BackGround . thank you
`
i think you should use something like z-index
Try calling Panels.Controls[Labels[i].Name].BringToFront(); in your delegate. This should bring each label in front of the pictures since they've already been added to the panel at that point.
I suppose you've already googled for this but here's a good link about winforms transparency.
I used to write many winforms applications that used very ugly skins with transparent labels. As I can remember there was some glitches when used jpg as a background picture and if picture loaded after the label has been drawn.
Anyway, I suggest overriding onPaint and onDraw methods as you can see in the link.
Transparency is only with respect to the container. For this to work you have to add the Label to the PictureBox. Change Panels to the name of the PictureBox you are working with in the Controls.Add() line.
I would like to have a form in which the controls on the form are fully visible but the form itself is invisible. If I change the form's Opacity, this makes both the form and the controls on it semi-transparent, so this doesn't work.
I can't do this by setting the form's TransparencyKey, since I have a PictureBox on the form. If the image in the PictureBox happens to contain pixels that match the TransparencyKey, they appear as openings in the form, which I don't want.
TransparencyKey is the only way to get this. Pick the right color. Color.Fuchsia has a long tradition of being the color of choice, going back to the early days of Win32 development. Assault your eye with it to see its merits.
With the caveat that I've never used it, just ran across it once, thought "neat!" and moved on...
Look into System.Drawing.Drawing2D.GraphicsPath and setting the form's Region property. I added two buttons to the basic Windows forms application:
public Form1()
{
InitializeComponent();
Rectangle r1 = new Rectangle(button1.Location, button1.Size);
Rectangle r2 = new Rectangle(button2.Location, button2.Size);
GraphicsPath gp = new GraphicsPath();
gp.AddRectangle(r1);
gp.AddRectangle(r2);
this.Region = new Region(gp);
}
I've approximated the shape of the button with a rectangle; with this code, you can see the form background color at the buttons' corners. You'll need to work out the enclosing path for each of your controls and add them to the path individually. You'll need to take into account any offset introduced by the form title bar or border style.
Update: I did some investigation and have a couple of possible approaches for the problem:
Using the GraphicsPath method, set pictureBox.Visible to False if there is no image loaded.
When you load an image into the picture box, analyze the image to get a list of all the colors in it, then randomly generate one that isn't. Set the form's BackColor and TransparencyKey properties to match this new color, Hans Passant's answer.