C# Discussion Boards - CodeProject

31-Jul-09 6:58

Hey there

I'm experiencing a little problem over here... In NotePad, when the scrollbars are visible I can use my middle mouse button to scroll horizontally or vertically, but when I create my own Text Editor in C#, this does not work. I can see for a split second the circular scroller thing appear but then it dissappears right away. Does anybody know a way to fix this?

Xmen Real 31-Jul-09 7:01

31-Jul-09 7:01

make sure textbox has focus as well as middle mouse is not pressed

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Baeltazor31-Jul-09 7:07

31-Jul-09 7:07

Thank you for your reply. I think I understand what you meant. I just went and made a change. I added textBox1.Focus(); to the code when I create the TextBox. but it still doesn't work. Do you know what causes this problem?

Regards,
Jason Pezzimenti.

If you liked the answer that I have provided, then please click the 'Good Answer' link on the bottom-right of this post. Thank you.

Xmen Real 31-Jul-09 7:09

31-Jul-09 7:09

use RichTextBox instead

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Baeltazor31-Jul-09 7:10

31-Jul-09 7:10

Ah, the good ol' RTB... My Arch Nemesis. The thing that would never save as PlainText. lol Thanks Smile | :)

Regards,
Jason Pezzimenti.

If you liked the answer that I have provided, then please click the 'Good Answer' link on the bottom-right of this post. Thank you.

Xmen Real 31-Jul-09 7:16

31-Jul-09 7:16

well, If I need to have large text with scrolling then textbox will be that the last thing I would think of.

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Baeltazor31-Jul-09 7:21

YDreams ImageMapDemo 2.0 Code Behind Issue

31-Jul-09 7:21

Yeah, that's understandable. Thanks for your help Xmen W.K. Smile | :)

I'll go and whip out my good old RTB and see what I can do Big Grin | :-D

dmgroup198431-Jul-09 6:47

dmgroup1984

31-Jul-09 6:47

Hello

I have an ImageMap created using YDreams ImageMapDemo 2.0. I'm using this control for the rollover image effect with circle and polygons hotspots. My issue is I can't seem to figure out how to write the correct C# code for each hotspot. I am able to get one hotspot to have the rollover effect but not the other 4. Can someone please help me out with the code behind. I am very very new with C+. Anyone's help would be much appreciated. Been banging my head for 2 months.

Thanks in advanced

Dale

Form code

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>

<%@ Register Assembly="YDreams.Web.UI.WebControls" Namespace="YDreams.Web.UI.WebControls"
    TagPrefix="ydreams" %>
    
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script type="text/javascript">
    
      function pageLoad() {
      }
    
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:ScriptManager ID="ScriptManager1" runat="server" />
    </div>
    <div>
        <ydreams:ImageMap ID="ImageMap1" ImageUrl="methodology_circle_green.gif" OnClick="ImageMap1_Click" runat="server">
            <ydreams:CircleHotSpot CenterX="210" CenterY="45" Description="Click to test post back..."
                HotSpotMode="Navigate" Radius="41" ToolTip="Post back" Id="AssessCircle" />
            <ydreams:CircleHotSpot CenterX="310" CenterY="120" Description="Click to test post back..."
                HotSpotMode="Navigate" Radius="41" ToolTip="Post back" Id="AnalyzeCircle" />
            <ydreams:CircleHotSpot CenterX="270" CenterY="240" Description="Click to test post back..."
                HotSpotMode="Navigate" Radius="41" ToolTip="Post back" Id="ArchitectCircle" />
            <ydreams:CircleHotSpot CenterX="145" CenterY="240" Description="Click to test post back..."
                HotSpotMode="Navigate" Radius="41" ToolTip="Post back" Id="AssembleCircle" />
            <ydreams:CircleHotSpot CenterX="103" CenterY="120" Description="Click to test post back..."
                HotSpotMode="Navigate" Radius="41" ToolTip="Post back" Id="AssimilateCircle" />
        </ydreams:ImageMap>
        <asp:Label ID="Label1" runat="server" Text=""></asp:Label>
    </div>
    </form>
</body>
</html>

Code Behind

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text;

public partial class Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        YDreams.Web.UI.WebControls.HotSpot AssessCircle = new YDreams.Web.UI.WebControls.CircleHotSpot(210, 45, 41);
        {
            ImageMap1.HotSpots.Add(AssessCircle);
            {
                // add OnMouseOver and OnMouseOut event handlers to the blue polygon hot spot
                YDreams.Web.UI.WebControls.CircleHotSpot circleHotSpot = (YDreams.Web.UI.WebControls.CircleHotSpot)this.ImageMap1.HotSpots["AssessCircle"];
                if (circleHotSpot != null)
                {
                    circleHotSpot.Attributes.Add("onMouseOver", "javascript:DisplayImage(image2);");
                    circleHotSpot.Attributes.Add("onMouseOut", "javascript:DisplayImage(image1);");
                }

                // add the script called by the event handlers
                string script = @"
                    var image1 = new Image(413, 285);
                    image1.src = 'methodology_circle_green.gif';
                    var image2 = new Image(413, 285);
                    image2.src = 'methodology_circle_blue_assess.gif';

                    function DisplayImage(image) {
	                    var theImage = document.images['ImageMap1'];
	                    if (!theImage) {
	                        theImage = document.getElementById('ImageMap1');	
	                    }
                        theImage.src = image.src;
                        return true;
                    }
                ";

                this.ClientScript.RegisterClientScriptBlock(this.GetType(), "DisplayImage", script, true);
            }
        }
        
        YDreams.Web.UI.WebControls.HotSpot AnalyzeCircle = new YDreams.Web.UI.WebControls.CircleHotSpot(310, 120, 41);
        {
            ImageMap1.HotSpots.Add(AnalyzeCircle);
            {
                // add OnMouseOver and OnMouseOut event handlers to the blue polygon hot spot
                YDreams.Web.UI.WebControls.CircleHotSpot circleHotSpot = (YDreams.Web.UI.WebControls.CircleHotSpot)this.ImageMap1.HotSpots["AnalyzeCircle"];
                if (circleHotSpot != null)
                {
                    circleHotSpot.Attributes.Add("onMouseOver", "javascript:DisplayImage(image2);");
                    circleHotSpot.Attributes.Add("onMouseOut", "javascript:DisplayImage(image1);");
                }

                // add the script called by the event handlers
                string script = @"
                    var image1 = new Image(413, 285);
                    image1.src = 'methodology_circle_green.gif';
                    var image2 = new Image(413, 285);
                    image2.src = 'methodology_circle_blue_analyze.gif';

                    function DisplayImage(image) {
	                    var theImage = document.images['ImageMap1'];
	                    if (!theImage) {
	                        theImage = document.getElementById('ImageMap1');	
	                    }
                        theImage.src = image.src;
                        return true;
                    }
                ";

                this.ClientScript.RegisterClientScriptBlock(this.GetType(), "DisplayImage", script, true);
            }
        }
    }
    protected void ImageMap1_Click(object sender, YDreams.Web.UI.WebControls.ImageMapClickEventArgs args)
    {
        YDreams.Web.UI.WebControls.HotSpot hotSpot = args.HotSpot;
        int x = args.X;
        int y = args.Y;

        // set the text of the label
        this.Label1.Text = string.Format("Clicked on hot spot \"{0}\" at image coordinates ({1}, {2})", hotSpot.Id, x, y);
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        this.Label1.Text = string.Empty;
    }

}

Re: YDreams ImageMapDemo 2.0 Code Behind Issue

Henry Minute31-Jul-09 9:28

Henry Minute

31-Jul-09 9:28

It would seem to me that you should be asking this, or at least you stand a better chance of an answer, if you had asked it in the Web Development or ASP Forums

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”

Re: YDreams ImageMapDemo 2.0 Code Behind Issue

dmgroup198431-Jul-09 11:38

dmgroup1984

31-Jul-09 11:38

Will do. Thanks

Changing the text colour (foreColor) of a DateTimePicker?

MWRivera31-Jul-09 6:44

Re: Changing the text colour (foreColor) of a DateTimePicker?

31-Jul-09 6:44

Hi All,

I've been able to change the colour of a dateTimePicker inherited field by overriding the backColor method and looking for the WM_ERASEBKGND message in wncProc.
I also want to change the font colour of the dateTimePicker. I thought I could do this by overriding the foreColor method similar to how I did for the backColor. I can't find the message/hex bumber to look for within wncProc.

Is there any such message for ForeColor? Any help/ideas on this would be great.

Thanks,
Mel

Ruben Herman27-Aug-10 23:24

Ruben Herman

27-Aug-10 23:24

I've got the same problem. Does anyone knows how to change the forecolor?

Changing the colour of the inside of a checkbox?

MWRivera31-Jul-09 6:34

Re: Changing the colour of the inside of a checkbox?

31-Jul-09 6:34

Hi All,

I have disabled a checkbox however when it's disabled I don't want it to be grayed out I want it to have it's enabled appearance. So instead of gray I whan it to be white.

Unlike TextBoxes when I use the following code the surrounding area of the checkbox and it's text change colour instead of the inside of the checkbox:

oCheckBox.BackColor = Color.White;

Does anyone know how I would go about doing this?

Thanks,
Mel

Xmen Real 31-Jul-09 6:53

Re: Changing the colour of the inside of a checkbox?

31-Jul-09 6:53

I dont think its possible unless you draw your own image on it but thats not good way. However, you can make your own CB using a Button and a Label. Change button background image or color on MouseEnter, MouseLeave, MouseDown and MouseUp.

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MWRivera31-Jul-09 8:04

Re: Changing the colour of the inside of a checkbox?

31-Jul-09 8:04

Hi xman

thanks for the idea. Are you suggesting that I make the button appear to look like a checkbox and go from there?

Thanks,
Mel

Xmen Real 31-Jul-09 8:21

Re: Changing the colour of the inside of a checkbox?

31-Jul-09 8:21

yupp, search for checkbox images or just capture 'em from screen...

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MWRivera31-Jul-09 8:23

Re: Changing the colour of the inside of a checkbox?

31-Jul-09 8:23

Ok, thanks for the idea.

Baeltazor31-Jul-09 7:25

Re: Changing the colour of the inside of a checkbox?

31-Jul-09 7:25

Um. I just created a project and added a checkbox to the form and set Enabled to FALSE. Then I changed the Form's backcolor to white and the checkbox backcolor also changed to white? This doesn't happen on your computer? What version of Vis' Studio are you using?

Regards,
Jason Pezzimenti.

If you liked the answer that I have provided, then please click the 'Good Answer' link on the bottom-right of this post. Thank you.

MWRivera31-Jul-09 8:00

Re: Changing the colour of the inside of a checkbox?

31-Jul-09 8:00

Hi Jason,

Thanks for your reply. I'm using VS 2005. What version are you using?

When I set

oCheckBox.Enabled = false;

and then

oCheckBox.BackColor = Color.White;

it makes the surrounding area behind the checkbox whiteish.

Baeltazor31-Jul-09 15:36

Re: Changing the colour of the inside of a checkbox?

31-Jul-09 15:36

Sorry for the late response MWRivera, I fell asleep.

I'm using VS 2008 Express Edition.

MWRivera wrote:
When I set
oCheckBox.Enabled = false;
and then
oCheckBox.BackColor = Color.White;
it makes the surrounding area behind the checkbox whiteish.

...Are you saying that you have solved your problem? I'm a little confused. In your original post you stated that you want it to be white. I hope you have solved it. Smile | :)

I do have a question though, is your checkbox ontop of another control, picturebox? Or is it just on the form background?

Regards,
Jason Pezzimenti.

MWRivera4-Aug-09 5:16

Re: Changing the colour of the inside of a checkbox?

4-Aug-09 5:16

Hi Jason,

No I heven't solved the problem I was just running through the details of what I have and the output I get, which isn't the desired output.

I guess VS 2008 solved this issue seems though you are getting different results.

No the checkbox isn't on top of any other coltrol or picturebox, it's just put onto a form.

Thanks,
Mel

MWRivera4-Aug-09 6:46

Re: Changing the colour of the inside of a checkbox?

4-Aug-09 6:46

Hi there,

I just want to let you know that I did find a work around. Not the best but it's alot more what I was looking for. It uses the OnClick event and when the form isn't in edit mode the checkBox is put back to it's origional state. I've included an example below to make it clearer:

oCheckBox.Click += new System.EventHandler(oCheckBox_OnClick);

private void oCheckBox_OnClick (object sender, System.EventArgs e)
        {

            if (!EditMode)
            {
                if (oCheckBox.Checked)
                    oCheckBox.Checked = false;
                else
                    oCheckBox.Checked = true;
            }

        }

If you have any feedback it would be very welcome.

Thanks again,
Mel

Henry Minute31-Jul-09 9:35

Henry Minute

31-Jul-09 9:35

The other day I was stooging around on the web and I found WindowsClient.NET[^], take a look at the first item.

I don't know if it will solve your problem because I have not looked at it myself yet, but it must be worth a look? Smile | :)

Re: Changing the colour of the inside of a checkbox?

MWRivera31-Jul-09 10:25