CODEWITHSUNDEEP
c#.netwinforms
blak3r
blak3r

Reputation: 16546

ToolStripMenuItem Background Image disappears on Mouse Over (.net winforms)

I've set a BackgroundImage on my ToolStripMenuItem that is part of a ContextMenuItem.

When I mouse over it, the background image disappears. The blue "highlight" box shows up over it (at least I think that's what's happening).

How can I display a background image when the mouse is over it?

I tried setting the image in an MouseEnter event but no luck.

Upvotes: 2

Views: 2525

Answers (3)

Rolwin Crasta
Rolwin Crasta

Reputation: 4349

public class customRenderer : ToolStripProfessionalRenderer
{
    protected override void OnRenderButtonBackground(ToolStripItemRenderEventArgs e)
    {
        // check if the object being rendered is actually a ToolStripButton
        if (e.Item is ToolStripButton)
        {
            ToolStripButton button = e.Item as ToolStripButton;

            // only render checked items differently
            if (button.Checked || button.Selected)
            {
               //do work here
            }
            else
                base.OnRenderButtonBackground(e);
        }
        // if this object is not a ToolStripButton, use the normal render event
        else
            base.OnRenderButtonBackground(e);
    }

    protected override void OnRenderItemBackground(ToolStripItemRenderEventArgs e)
    {
        //do checking here like above
        base.OnRenderItemBackground(e);
    }

}

this worked for me

Upvotes: 0

terrybozzio
terrybozzio

Reputation: 4532

Make a class deriving from ToolStripProfessionalRenderer

public class customRenderer : ToolStripProfessionalRenderer
    {
        protected override void OnRenderButtonBackground(ToolStripItemRenderEventArgs e)
        {
            // check if the object being rendered is actually a ToolStripButton
            if (e.Item is ToolStripButton)
            {
                ToolStripButton button = e.Item as ToolStripButton;

                // only render checked items differently
                if (button.Checked || button.Selected)
                {
                   //do work here
                }
                else
                    base.OnRenderButtonBackground(e);
            }
            // if this object is not a ToolStripButton, use the normal render event
            else
                base.OnRenderButtonBackground(e);
        }

        protected override void OnRenderItemBackground(ToolStripItemRenderEventArgs e)
        {
            //do checking here like above
            base.OnRenderItemBackground(e);
        }

    }

set the renderes of controls you have on form constructor - works for all from toolstrip(toolstrippbackground,toolstripbutton,contexmenustrip,etc) i just overrided OnRenderButtonBackground because you mention this,you can override other methods of ToolStripProfessionalRenderer

toolStrip1.Renderer = new customRenderer();//if you have this and want to override any behaviour
            menuStrip1.Renderer = new customRenderer();//if you have this and want to override any behaviour
            contextMenuStrip1.Renderer = new customRenderer();//if you have this and want to override any behaviour

Upvotes: 3

blak3r
blak3r

Reputation: 16546

To do this you need to use a custom renderer.

Set Renderer on the ContextMenuStrip

contextMenuStrip1.Renderer = new BackgroundImageRenderer();

Add this "Renderer Class"

Customize the variables as appropriate.

private class BackgroundImageRenderer : ToolStripProfessionalRenderer
{
    protected override void OnRenderMenuItemBackground(ToolStripItemRenderEventArgs e)
    {
        if (!e.Item.Selected)
        {
            base.OnRenderMenuItemBackground(e);
        }
        else
        {
            if (e.Item.Name == "theNameOfMyToolStripMenuItem")
            {
                Image backgroundImage = global::YourProject.Properties.Resources.ImageFileName;
                e.Graphics.DrawImage(backgroundImage, 0, 0, e.Item.Width, e.Item.Height);
            }
            else {
                base.OnRenderMenuItemBackground(e);
            }
        }
    }
}

Upvotes: 3

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