Dependency Property - Textbox HorizontalAlignment

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Dear sir,

I am new to WPF, I try to developing a simple panel. In the panel arranging the textbox and textblock to Left, Right and Centre.

How can i get the Textbox HorizontalAlignment is Left or Right and Verticalaignment is top or bottom from the XAML code

my code :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Controls;
using System.Windows;

namespace MySimplePanel
{
    public class MySimplePanelClass : Panel
    {
        protected override Size MeasureOverride(Size availableSize)
        {
            Size maxSize = new Size();
            foreach (UIElement child in this.Children)
            {
                child.Measure(availableSize);
                maxSize.Height = Math.Max(child.DesiredSize.Height, maxSize.Height);
                maxSize.Width = Math.Max(child.DesiredSize.Width, maxSize.Width);

            }
            return maxSize;
        }

        protected override Size ArrangeOverride(Size finalSize)
        {
            foreach (UIElement child in InternalChildren)
            {
                child.Arrange(new Rect(finalSize));
                //if (HorizontalAlignment == HorizontalAlignment.Right)
                //{
                //}
            }
            return finalSize;
        }
}

XAML code :

HTML

<window x:class="MySimplePanel.MainWindow" xmlns:x="#unknown">
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:MySimplePanel"
        Title="MainWindow" Height="350" Width="525">
    <grid>
        <local:mysimplepanelclass grid.columnspan="5" horizontalalignment="Stretch" xmlns:local="#unknown">
            <textbox height="23" horizontalalignment="Left" margin="0,10,0,0" name="textBox1" verticalalignment="Top" width="120" />
            <textbox height="23" horizontalalignment="Left" margin="100,10,0,0" name="textBox2" verticalalignment="Top" width="120" textalignment="Center" />
            <textbox height="23" horizontalalignment="Right" margin="200,10,0,0" name="textBox3" verticalalignment="Top" width="120" />
            <textbox height="23" horizontalalignment="Right" margin="360,10,0,0" name="textBox4" verticalalignment="Top" width="120" />
        </local:mysimplepanelclass>

    </grid>
</window>

Thanks all

Posted 1-Sep-11 22:47pm

gpasupathi

Updated 1-Sep-11 22:49pm

Abhinav S

v2

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Abhinav S 2-Sep-11 4:49am

Code tags added.

2 solutions

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Abhinav S · Answer 1 · 2011-09-01T22:55:00

Solution 1

Try the following in your code -

C#

protected override Size ArrangeOverride(Size finalSize)
{
    foreach (UIElement child in InternalChildren)
    {
        child.Arrange(new Rect(finalSize));
        if (child is TextBox)
        {
            HorizontalAlignment horizontalAlignment = ((TextBox)child).HorizontalAlignment; //Gets horizontal alignment
            VerticalAlignment verticalAlignment = ((TextBox)child).VerticalAlignment; //Gets vertical alignment
        }
    }
    return finalSize;
}

Posted 1-Sep-11 22:55pm

Abhinav S

Updated 1-Sep-11 22:56pm

v2

Comments

gpasupathi 2-Sep-11 5:01am

many thanks

gpasupathi 2-Sep-11 5:05am

dear sir, any sample for alignment with Dependency Property

Abhinav S 2-Sep-11 5:30am

Alignment is a Dependecy Property. When you set it in the xaml, you are setting the dependency property itself.

Simon Bang Terkildsen 2-Sep-11 5:52am

+5 . However I would love to know why the OP has the need to implement his own Panel.

Abhinav S 2-Sep-11 6:11am

Thanks for the 5.
That is a good question for the OP.

gpasupathi 2-Sep-11 7:15am

i could not set centre and right side of the panel

Abhinav S 2-Sep-11 8:14am

If you have set the HorizontalAlignment to Left, you will only get Left back.
You will not get Center or Right.

gpasupathi 3-Sep-11 0:49am

thanks for all, can change the textbox width from in the custom panel

gpasupathi · Answer 2 · 2011-09-02T19:30:00

can change width or margin or thickness of the TextBox
thanks

Code :
protected override Size ArrangeOverride(Size finalSize)
{
double x = 0.0;
double y = 0.0;
double fw = finalSize.Width;
double TotRightWidth = 0.0;
double TotWidth = 0.0;

HorizontalAlignment horizontalAlignment = HorizontalAlignment;

foreach (UIElement child in this.Children)
{
if (child is TextBox)
{
horizontalAlignment = ((TextBox)child).HorizontalAlignment; //Gets horizontal alignment
TotWidth += child.DesiredSize.Width;
}
if (child is TextBlock)
{
horizontalAlignment = ((TextBlock)child).HorizontalAlignment; //Gets horizontal alignment
TotWidth += child.DesiredSize.Width;
}
if (horizontalAlignment == HorizontalAlignment.Right)
{
TotRightWidth += child.DesiredSize.Width;
}
}

double DiffWidth = (TotWidth - finalSize.Width) / Children.Count;
fw = finalSize.Width - TotRightWidth;

foreach (UIElement child in Children)
{
if (child is TextBox)
{
horizontalAlignment = ((TextBox)child).HorizontalAlignment; //Gets horizontal alignment
//VerticalAlignment verticalAlignment = ((TextBox)child).VerticalAlignment; //Gets vertical alignment
}
if (child is TextBlock)
{
horizontalAlignment = ((TextBlock)child).HorizontalAlignment; //Gets horizontal alignment
//VerticalAlignment verticalAlignment = ((TextBlock)child).VerticalAlignment; //Gets vertical alignment
}

if (horizontalAlignment == HorizontalAlignment.Right)
{
Rect rec = new Rect(new Point(fw , y), child.DesiredSize);
child.Arrange(rec);
fw += child.DesiredSize.Width;
}
else
{
Rect rec = new Rect(new Point(x, y), child.DesiredSize);
child.Arrange(rec);
x += child.DesiredSize.Width;
}
}
return finalSize;
}