Overriding a ComboBox

[RSH]

I tried an implementation of overriding a ComboBox control. I am simply
trying to avoid it repainting, but I can't seem to get it to work. What am I
doing wrong?

Please help.

Thanks,
Ron



using System;

using System.Collecti ons.Generic;

using System.Componen tModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows. Forms;

using System.Text.Reg ularExpressions ;

using System.Collecti ons;

using System.Drawing. Drawing2D;

namespace GeneralTesting

{

public partial class frmMain : Form

{

MyCustomComboBo x TB1 = new MyCustomComboBo x();
public frmMain()

{

InitializeCompo nent();

TB1.FormattingE nabled = true;

TB1.Location = new System.Drawing. Point(13, 214);

TB1.Name = "TB1";

TB1.Size = new System.Drawing. Size(385, 21);

TB1.TabIndex = 1;

TB1.SelectedInd exChanged += new
System.EventHan dler(this.TB1_S electedIndexCha nged_1);

this.Controls.A dd(TB1);

DataClass DC = new

}

private void TB1_SelectedInd exChanged_1(obj ect sender, EventArgs e)

{

richTextBox1.Te xt += ((Employee)TB1. SelectedItem).T oString() + "\n";

TB1.Items.Remov e((Employee)TB1 .SelectedItem);

}

private void button1_Click(o bject sender, EventArgs e)

{

if (TB1.Enabled == true)

{

TB1.Enabled = false;

}

else

{

TB1.Enabled = true;

}

}

class MyCustomComboBo x : ComboBox

{

protected override void OnPaint(PaintEv entArgs e)

{

// ...

MessageBox.Show ("TRIGGERED OnPaint");

}

protected override void OnPaintBackgrou nd(PaintEventAr gs e)

{

// .. I suspect you may be more interested in

// .. override its background painting.

MessageBox.Show ("TRIGGERED OnPaintBackgrou nd");

}

}

}

}

[Nicholas Paldino [.NET/C# MVP]]

RSH,

If you keep it from repainting, then it will not display properly. Why
do you want to prevent it from repainting?
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"RSH" <wa************ *@yahoo.com> wrote in message
news:u0******** ******@TK2MSFTN GP11.phx.gbl...

I tried an implementation of overriding a ComboBox control. I am simply
trying to avoid it repainting, but I can't seem to get it to work. What am
I doing wrong?

Please help.

Thanks,
Ron



using System;

using System.Collecti ons.Generic;

using System.Componen tModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows. Forms;

using System.Text.Reg ularExpressions ;

using System.Collecti ons;

using System.Drawing. Drawing2D;

namespace GeneralTesting

{

public partial class frmMain : Form

{

MyCustomComboBo x TB1 = new MyCustomComboBo x();
public frmMain()

{

InitializeCompo nent();

TB1.FormattingE nabled = true;

TB1.Location = new System.Drawing. Point(13, 214);

TB1.Name = "TB1";

TB1.Size = new System.Drawing. Size(385, 21);

TB1.TabIndex = 1;

TB1.SelectedInd exChanged += new
System.EventHan dler(this.TB1_S electedIndexCha nged_1);

this.Controls.A dd(TB1);

DataClass DC = new

}

private void TB1_SelectedInd exChanged_1(obj ect sender, EventArgs e)

{

richTextBox1.Te xt += ((Employee)TB1. SelectedItem).T oString() + "\n";

TB1.Items.Remov e((Employee)TB1 .SelectedItem);

}

private void button1_Click(o bject sender, EventArgs e)

{

if (TB1.Enabled == true)

{

TB1.Enabled = false;

}

else

{

TB1.Enabled = true;

}

}

class MyCustomComboBo x : ComboBox

{

protected override void OnPaint(PaintEv entArgs e)

{

// ...

MessageBox.Show ("TRIGGERED OnPaint");

}

protected override void OnPaintBackgrou nd(PaintEventAr gs e)

{

// .. I suspect you may be more interested in

// .. override its background painting.

MessageBox.Show ("TRIGGERED OnPaintBackgrou nd");

}

}

}

}

[Rocky]

comboBox1.DrawM ode = DrawMode.OwnerD rawFixed;
comboBox1.DrawM ode = DrawMode.OwnerD rawVariable;

You must handle the Draw Item event.

"RSH" <wa************ *@yahoo.com> wrote in message
news:u0******** ******@TK2MSFTN GP11.phx.gbl...

I tried an implementation of overriding a ComboBox control. I am simply
trying to avoid it repainting, but I can't seem to get it to work. What am
I doing wrong?

Please help.

Thanks,
Ron



using System;

using System.Collecti ons.Generic;

using System.Componen tModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows. Forms;

using System.Text.Reg ularExpressions ;

using System.Collecti ons;

using System.Drawing. Drawing2D;

namespace GeneralTesting

{

public partial class frmMain : Form

{

MyCustomComboBo x TB1 = new MyCustomComboBo x();
public frmMain()

{

InitializeCompo nent();

TB1.FormattingE nabled = true;

TB1.Location = new System.Drawing. Point(13, 214);

TB1.Name = "TB1";

TB1.Size = new System.Drawing. Size(385, 21);

TB1.TabIndex = 1;

TB1.SelectedInd exChanged += new
System.EventHan dler(this.TB1_S electedIndexCha nged_1);

this.Controls.A dd(TB1);

DataClass DC = new

}

private void TB1_SelectedInd exChanged_1(obj ect sender, EventArgs e)

{

richTextBox1.Te xt += ((Employee)TB1. SelectedItem).T oString() + "\n";

TB1.Items.Remov e((Employee)TB1 .SelectedItem);

}

private void button1_Click(o bject sender, EventArgs e)

{

if (TB1.Enabled == true)

{

TB1.Enabled = false;

}

else

{

TB1.Enabled = true;

}

}

class MyCustomComboBo x : ComboBox

{

protected override void OnPaint(PaintEv entArgs e)

{

// ...

MessageBox.Show ("TRIGGERED OnPaint");

}

protected override void OnPaintBackgrou nd(PaintEventAr gs e)

{

// .. I suspect you may be more interested in

// .. override its background painting.

MessageBox.Show ("TRIGGERED OnPaintBackgrou nd");

}

}

}

}

[RSH]

Well its all part of an elaborate plot...you see if you set the Enabled
property of a combobox to false it automatically sets the background to the
standard Windows color without the possibility of setting it to anything
else. And I have a form that uses a gradient background from deep grey to
light grey and the controls look like crap with their beige color when they
are disabled so I am trying to figure out a way to prevent it from
happening. it was suggested the I override the paint method of the control.

My problem is that nothing is happening. The messageboxes are never being
triggered. If I put a contructor in place with a message box the object is
definitately getting created because the messagebox shows when the
contructor is called...but still either of the paint methods are being
called.

Thanks,
Ron
"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> wrote in
message news:uy******** ******@TK2MSFTN GP14.phx.gbl...

RSH,

If you keep it from repainting, then it will not display properly. Why
do you want to prevent it from repainting?
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"RSH" <wa************ *@yahoo.com> wrote in message
news:u0******** ******@TK2MSFTN GP11.phx.gbl...

I tried an implementation of overriding a ComboBox control. I am simply
trying to avoid it repainting, but I can't seem to get it to work. What
am I doing wrong?

Please help.

Thanks,
Ron



using System;

using System.Collecti ons.Generic;

using System.Componen tModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows. Forms;

using System.Text.Reg ularExpressions ;

using System.Collecti ons;

using System.Drawing. Drawing2D;

namespace GeneralTesting

{

public partial class frmMain : Form

{

MyCustomComboBo x TB1 = new MyCustomComboBo x();
public frmMain()

{

InitializeCompo nent();

TB1.FormattingE nabled = true;

TB1.Location = new System.Drawing. Point(13, 214);

TB1.Name = "TB1";

TB1.Size = new System.Drawing. Size(385, 21);

TB1.TabIndex = 1;

TB1.SelectedInd exChanged += new
System.EventHan dler(this.TB1_S electedIndexCha nged_1);

this.Controls.A dd(TB1);

DataClass DC = new

}

private void TB1_SelectedInd exChanged_1(obj ect sender, EventArgs e)

{

richTextBox1.Te xt += ((Employee)TB1. SelectedItem).T oString() + "\n";

TB1.Items.Remov e((Employee)TB1 .SelectedItem);

}

private void button1_Click(o bject sender, EventArgs e)

{

if (TB1.Enabled == true)

{

TB1.Enabled = false;

}

else

{

TB1.Enabled = true;

}

}

class MyCustomComboBo x : ComboBox

{

protected override void OnPaint(PaintEv entArgs e)

{

// ...

MessageBox.Show ("TRIGGERED OnPaint");

}

protected override void OnPaintBackgrou nd(PaintEventAr gs e)

{

// .. I suspect you may be more interested in

// .. override its background painting.

MessageBox.Show ("TRIGGERED OnPaintBackgrou nd");

}

}

}

}

[RSH]

This only effects the list items that are listed, not the colors when the
control is set to Enabled = False.
"Rocky" <no*****@nowher e.com> wrote in message
news:O7******** ******@TK2MSFTN GP12.phx.gbl...

comboBox1.DrawM ode = DrawMode.OwnerD rawFixed;
comboBox1.DrawM ode = DrawMode.OwnerD rawVariable;

You must handle the Draw Item event.

"RSH" <wa************ *@yahoo.com> wrote in message
news:u0******** ******@TK2MSFTN GP11.phx.gbl...

I tried an implementation of overriding a ComboBox control. I am simply
trying to avoid it repainting, but I can't seem to get it to work. What
am I doing wrong?

Please help.

Thanks,
Ron



using System;

using System.Collecti ons.Generic;

using System.Componen tModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows. Forms;

using System.Text.Reg ularExpressions ;

using System.Collecti ons;

using System.Drawing. Drawing2D;

namespace GeneralTesting

{

public partial class frmMain : Form

{

MyCustomComboBo x TB1 = new MyCustomComboBo x();
public frmMain()

{

InitializeCompo nent();

TB1.FormattingE nabled = true;

TB1.Location = new System.Drawing. Point(13, 214);

TB1.Name = "TB1";

TB1.Size = new System.Drawing. Size(385, 21);

TB1.TabIndex = 1;

TB1.SelectedInd exChanged += new
System.EventHan dler(this.TB1_S electedIndexCha nged_1);

this.Controls.A dd(TB1);

DataClass DC = new

}

private void TB1_SelectedInd exChanged_1(obj ect sender, EventArgs e)

{

richTextBox1.Te xt += ((Employee)TB1. SelectedItem).T oString() + "\n";

TB1.Items.Remov e((Employee)TB1 .SelectedItem);

}

private void button1_Click(o bject sender, EventArgs e)

{

if (TB1.Enabled == true)

{

TB1.Enabled = false;

}

else

{

TB1.Enabled = true;

}

}

class MyCustomComboBo x : ComboBox

{

protected override void OnPaint(PaintEv entArgs e)

{

// ...

MessageBox.Show ("TRIGGERED OnPaint");

}

protected override void OnPaintBackgrou nd(PaintEventAr gs e)

{

// .. I suspect you may be more interested in

// .. override its background painting.

MessageBox.Show ("TRIGGERED OnPaintBackgrou nd");

}

}

}

}