I work on MDIParent with background image after i move a child from in it the background image crush like this
how can i solve this issue in C# winforms??
The MDIClient Control is the object used, in Multiple-Document Interface, as the Container for all child Forms.
This Control has a BackGroundImage property. You can set an Image object using this property, instead of using the [MDIParent].BackGroundImage. This would actually solve the Image tearing problem.
But, you can't set a specific Layout property. See the Docs about the MDIClient BackgroundImageLayout:
This property is not relevant to this class.
You can set this property, but it's ignored: the default ImageLayout.Tile is used instead.
A different Layout can be set, assigning the Image object to the MDIParent BackGroundImage and specifying a BackGroundImageLayout. This will change the Layout, but it will also cause the tearing effect you are reporting.
A possible solution is to draw the Image object on the MDIClient surface, using it's Paint() event as usual.
This will solve the tearing effect. Not the flickering; this can be noticed when you resize the MDIParent Form (well, MDI applications are not resized that often, maybe maximized and normalized).
Some flickering can be seen when the background Image is not covered by a child Form.
A small adjustment to the Image specs is required: setting its DPI resolution = to the MDIParent reported device context DPI, otherwise the Image size will not match the default size (it's affected by the DPI resolution).
See this post for a description:
Image is not drawn at the correct spot.
An example:
(Here, I assume the background Image is loaded from the Project resources)
public partial class MDIParent : Form
{
private MdiClient mdiBackground = null;
private Bitmap BackGroundImage = null;
public MDIParent()
{
InitializeComponent();
//Specify an existing Resources' Image
BackGroundImage = new Bitmap(Properties.Resources.[Some Res Image] as Bitmap);
BackGroundImage.SetResolution(this.DeviceDpi, this.DeviceDpi);
}
private void Form1_Load(object sender, EventArgs e)
{
mdiBackground = this.Controls.OfType<MdiClient>().First();
mdiBackground.Paint += (s, evt) => {
evt.Graphics.DrawImage(BackGroundImage,
(mdiBackground.Width - BackGroundImage.Width) / 2.0F,
(mdiBackground.Height - BackGroundImage.Height) / 2.0F);
};
//Show some child Forms on start-up
}
private void Form1_Resize(object sender, EventArgs e)
{
if (this.mdiBackground != null) mdiBackground.Invalidate();
}
private void MDIParent_FormClosed(object sender, FormClosedEventArgs e)
{
if (BackGroundImage != null) BackGroundImage.Dispose();
}
}
Related
When doubleclicking the picturebox object contained within this windows form, an enlarged version of the image will appear, stored in a secondary windows form.
The issue is that the form size will be different depending on the dimensions of the original image. Sometimes the image will take up a portion of the screen or even take up the entire screen. It would be ideal to make the popup image a consistent size.
The secondary windows form is set to be 500 by 500 pixels. What is the best way to correct the following function so that the secondary image appears at a consistent 500 by 500 pixels? Additionally, would it be possible to scale the image to a set amount to prevent the form from taking up the entire screen?
private void IdPictureBox_DoubleClick(object sender, EventArgs e)
{
var image = IdPictureBox.Image;
if (image != null)
{
PopUpImage pui = new PopUpImage();
pui.BackgroundImage = IdPictureBox.Image;
pui.Size = IdPictureBox.Image.Size;
pui.Show();
}
}
Made the following changes.
private void IdPictureBox_DoubleClick(object sender, EventArgs e)
{
var image = IdPictureBox.Image;
if (image != null)
{
PopUpImage pui = new PopUpImage();
pui.BackgroundImage = IdPictureBox.Image;
pui.BackgroundImageLayout = ImageLayout.Stretch;
pui.Show();
}
}
I would like a transparent overlapped non-clipped image. I have one PictureBox overlapping another, as shown in this SO thread.
The solution, which makes sense, sets the parent of the top image to the bottom image. The top image is then set to have a transparent background. The technique works perfectly, just setting the parent of the top image to that of the bottom clips the top image to the area of the bottom image.
Top Image Parent Property NOT Set to the Bottom Image
Now, here is what happens if the top image parent property gets set to the bottom image.
I do not want the top image clipped.
I would volunteer the entire Visual Studio 2019 (VS2019) project, but not sure how to post it.
Here is the code:
using System;
using System.Drawing;
using System.Windows.Forms;
namespace ImageOverlap
{
public partial class FrmMain : Form
{
public FrmMain()
{
InitializeComponent();
}
private void FrmMain_Load(object sender, EventArgs e)
{
this.ImgTop.Parent = this.ImgBottom;
this.ImgTop.BackColor = Color.Transparent;
//this.ImgTop.BringToFront();
this.ChangeX.Value = 430;
this.ChangeY.Value = 15;
}
private void ChangeX_ValueChanged(object sender, EventArgs e)
{
this.ImgTop.Left = (int)this.ChangeX.Value;
}
private void ChangeY_ValueChanged(object sender, EventArgs e)
{
this.ImgTop.Top = (int)this.ChangeY.Value;
}
}
}
I put 2 NumericUpDown controls to better adjust the position of the finger pointer.
The call to method BringToFront() can be deleted, as does nothing, just above as mentioned in a couple of answers and used for testing.
UPDATE
I do NOT want to stretch the bottom image. I want to see the form background.
I also realize that the hand pointer is out of bounds of the bottom (parent) image. As such, the hand pointers gets clipped, cut off.
I want to the entirety of the top image to show, just the part of the top image, which overlaps the bottom image to be transparent.
Using what has got to be the world's best app, Paint.Net, here is what I want, also in a nice reusable code format.
My thought towards a solution is at the moment to make a programmatic copy of the hand pointer and overlay that using onto the form just clipping the left portion, which overlaps the bottom image. I think this idea might work, will post as answer if it works.
This answer can probably be optimized and made more reusable, but it works.
I created a copy of the top control. I then used this updated code, which includes a reusable method.
using System;
using System.Drawing;
using System.Windows.Forms;
namespace ImageOverlap
{
public partial class FrmMain : Form
{
public FrmMain()
{
InitializeComponent();
}
private void FrmMain_Load(object sender, EventArgs e)
{
this.ImgTop.Parent = this.ImgBottom;
this.ImgTop.BackColor = Color.Transparent;
this.ImgTop.BringToFront();
this.ChangeX.Value = 430;
this.ChangeY.Value = 15;
}
private void ChangeX_ValueChanged(object sender, EventArgs e)
{
this.SetOverlayImageLocation((int)this.ChangeX.Value, this.ImgTop.Top);
}
private void ChangeY_ValueChanged(object sender, EventArgs e)
{
this.SetOverlayImageLocation(this.ImgTop.Left, (int)this.ChangeY.Value);
}
private void SetOverlayImageLocation(int newX, int newY)
{
this.ImgTop.Left = newX;
this.ImgTop.Top = newY;
Point ptImageAtParent = new Point(this.ImgTop.Left + this.ImgBottom.Left, this.ImgTop.Top + this.ImgBottom.Top);
this.ImgTopCopy.Location = ptImageAtParent;
this.ImgTopCopy.SendToBack();
}
}
}
I am thinking that .Net probably has a nice method/property to get the point relative to the parent. I did that in a brute force method. I then set the copy to the back. The location of the copy is set relative to the parent. The trick is that the copy has the parent property set to the main control.
Here is the runtime visual that I got, no Paint.Net involved; looks identical, which is the objective.
The nice part is that the NumericUpDown controls work flawlessly moving the combined image, which to the user appears as one image.
You want the entire image render on bottom image, if yes it means your problem is calculation of top image position.
this.ImgTop.Parent = this.ImgBottom;
this.ImgTop.BackColor = Color.Transparent;
this.ImgTop.BringToFront();
this.ImgTop.Top = 0;
this.ImgTop.Left = ImgBottom.Width - ImgTop.Width;
I see your replay to Reza, sorry for misunderstood. you set the parent of top image to bottom image. the control can't do any more actions outside of parent area after this. if you want to do that you can dynamically split your image into to separate image controls, one of theme inside the bottom image and another outside and control position of both of theme or implement own control maybe by the help of polygons.
I have a form acting as a sidebar, that will always be locked in position, and width. However, if I were to resize the MDI Container, this form should also grow to fit the Parent form length-ways.
For example, if I were to use a method in the Parent form like so:
private void ParentForm_SizeChanged(object sender, EventArgs e)
{
FormWindowState LastWindowState = FormWindowState.Normal;
if (this.WindowState != LastWindowState)
{
if (this.WindowState == FormWindowState.Maximized)
ResizeChildForm(this);
}
}
And then in the Child form, if I have the property Locked = true; will I have to disable that, resize the form, then enable that again? I.e.
private void ResizeChildForm(ParentForm)
{
this.Locked = false;
//resize form
this.Locked = true;
}
Or can I just change the size of the form without having to change that property?
To answer your question,
can I just change the size of the form without having to change that property?
Yes you can, see this link for more details.
Note from the article :
Locking controls prevents them from being dragged to a new size or location on the design surface. However, you can still change the size or location of controls by means of the Properties window or in code.
I have a form that i set it's Opacity as 50% like this:
this.Opacity = 0.5D; <--this==Form
My problem is that everything that on the form is with an Opacity of 50%
I have two buttons on the form and I want them without Opacity.
I know that this.Opacity included all Controls and for some reason the graphics too
My question is, How to Exclude the Opacity of the controls?
Example Image:
Thanks!
Since Control doesn't have Opacity property and plus that, most of the controls doesn't support transparent colors, then a working solution can be this:
Create a Form called MainForm and place all the controls you're going to be excluded.
1.1 Set both of BackColor and TransparencyKey properties of MainForm to the same color, e.g Color.Red
Create another form named TransparentForm and place all controls that must become transparent. Set ShowInTaskbar property to False.
In the MainForm Load event show the TransparentForm and send it to back.
private void MainForm_Load(object sender, EventArgs e)
{
TransparentForm form = new TransparentForm();
form.Opacity = 0.5D;
form.Show();
form.SendToBack();
}
The position of controls in both form must be such that, when combined, it shows the proper user interface.
Crate a C# project and add 3 forms named
MAIN
BACKGOUND
Child
and add the following code for "MAIN" form load event;
private void MAIN_Load(object sender, EventArgs e)
{
Child frm1 = new Child();
BACKGOUND frm2 = new BACKGOUND();
frm2 .WindowState = System.Windows.Forms.FormWindowState.Maximized;
frm2.Opacity = 0.5;
frm2.Show();
frm1.ShowDialog();
frm2.Close();
}
I'm trying to create a button in my .NET 4.0 Winforms app in Visual Studio 2010 that is ONLY an image. I have a window that is borderless and has a background image that makes up my custom skin for this application. For the close/minimize buttons in the top right of the window, I wanted to create 2 simple buttons that are images only that look like the typical Windows close/minimize buttons.
I may be going about this design wrong, so if I am please let me know. So far I've determined that I need to create a subclass for Button that only renders the image. The final implementation needs to render different images for each button state (normal, hover, clicked, etc). Here is what I have so far:
public class ImageButton : Button
{
Pen pen = new Pen( Color.Red, 1.0f );
public ImageButton()
{
SetClientSizeCore( BackgroundImage.Width, BackgroundImage.Height );
}
protected override void OnPaint( PaintEventArgs e )
{
e.Graphics.DrawImage( BackgroundImage, 0, 0 );
//e.Graphics.DrawRectangle( pen, ClientRectangle );
//Rectangle bounds = new Rectangle( 0, 0, Width, Height );
//ButtonRenderer.DrawButton( e.Graphics, bounds, PushButtonState.Normal );
//base.OnPaint(pevent);
}
protected override void OnPaintBackground( PaintEventArgs e )
{
// Do nothing
}
}
At this point, assuming this design is appropriate, I need to know how to call SetClientSizeCore() appropriately. Calling it in the constructor raises an exception. I assume this is because the control hasn't had a chance to initialize yet. I'm not sure what function to override that will allow me to change the size of my button to fit the image after it has been initialized by .NET. Any ideas on this?
In the constructor, BackgroundImage is null.
You need to set the size when BackgroundImage is changed by overriding the property.
You should also shadow the Size property and add [DesignerSerializationVisibilty(DesignerSerializationVisibility.Hidden)] to prevent the size from being saved by the designer.
Wait until the BackgroundImage property is assigned so you'll know what size you need. Override the property like this:
public override Image BackgroundImage {
get { return base.BackgroundImage; }
set {
base.BackgroundImage = value;
if (value != null) this.Size = value.Size;
}
}
If you want to use ImageButtons, I'd recommend using BunifuUI as it has ImageButtons.
If you don't want to use BunifuUI, you can use a PictureBox as it also has a click event. Example:
private void pictureBox1_Click(object Sender, EventArgs e) {
webBrowser1.Navigate("https://www.google.com");
}