本文介绍了下面的代码中从右到左的布局属性的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在为Windows CE .Net 2.0 C#应用程序创建自己的自定义进度栏控件.下面是可以正常工作的代码,唯一缺少的是我想显示进度,从右到左有人可以帮助我修改此代码以获得RTL属性
I am creating my own custom progress bar control for windows CE .Net 2.0 C# Application. Below is the code which works fine the only thing missing is I want to show progress Right to left can anyone help me in modifying this code to get RTL property
using System;
using System.Drawing;
using System.Windows.Forms;
class CustomProgressBar:UserControl
{
int min = 0; // Minimum value for progress range
int max = 100; // Maximum value for progress range
int val = 0; // Current progress
Color BarColor = Color.Blue; // Color of progress meter
protected override void OnResize(EventArgs e)
{
// Invalidate the control to get a repaint.
this.Invalidate();
}
protected override void OnPaint(PaintEventArgs e)
{
Graphics g = e.Graphics;
SolidBrush brush = new SolidBrush(BarColor);
float percent = (float)(val - min) / (float)(max - min);
Rectangle rect = this.ClientRectangle;
// Calculate area for drawing the progress.
rect.Width = (int)((float)rect.Width * percent);
// Draw the progress meter.
g.FillRectangle(brush, rect);
// Draw a three-dimensional border around the control.
Draw3DBorder(g);
// Clean up.
brush.Dispose();
g.Dispose();
}
public int Minimum
{
get
{
return min;
}
set
{
// Prevent a negative value.
if (value < 0)
{
min = 0;
}
// Make sure that the minimum value is never set higher than the maximum value.
if (value > max)
{
min = value;
min = value;
}
// Ensure value is still in range
if (val < min)
{
val = min;
}
// Invalidate the control to get a repaint.
this.Invalidate();
}
}
public int Maximum
{
get
{
return max;
}
set
{
// Make sure that the maximum value is never set lower than the minimum value.
if (value < min)
{
min = value;
}
max = value;
// Make sure that value is still in range.
if (val > max)
{
val = max;
}
// Invalidate the control to get a repaint.
this.Invalidate();
}
}
public int Value
{
get
{
return val;
}
set
{
int oldValue = val;
// Make sure that the value does not stray outside the valid range.
if (value < min)
{
val = min;
}
else if (value > max)
{
val = max;
}
else
{
val = value;
}
// Invalidate only the changed area.
float percent;
Rectangle newValueRect = this.ClientRectangle;
Rectangle oldValueRect = this.ClientRectangle;
// Use a new value to calculate the rectangle for progress.
percent = (float)(val - min) / (float)(max - min);
newValueRect.Width = (int)((float)newValueRect.Width * percent);
// Use an old value to calculate the rectangle for progress.
percent = (float)(oldValue - min) / (float)(max - min);
oldValueRect.Width = (int)((float)oldValueRect.Width * percent);
Rectangle updateRect = new Rectangle();
// Find only the part of the screen that must be updated.
if (newValueRect.Width > oldValueRect.Width)
{
updateRect.X = oldValueRect.Size.Width;
updateRect.Width = newValueRect.Width - oldValueRect.Width;
}
else
{
updateRect.X = newValueRect.Size.Width;
updateRect.Width = oldValueRect.Width - newValueRect.Width;
}
updateRect.Height = this.Height;
// Invalidate the intersection region only.
this.Invalidate(updateRect);
}
}
public Color ProgressBarColor
{
get
{
return BarColor;
}
set
{
BarColor = value;
// Invalidate the control to get a repaint.
this.Invalidate();
}
}
private void Draw3DBorder(Graphics g)
{
int PenWidth = (int)Pens.White.Width;
g.DrawLine(Pens.DarkGray,
new Point(this.ClientRectangle.Left, this.ClientRectangle.Top),
new Point(this.ClientRectangle.Width - PenWidth, this.ClientRectangle.Top));
g.DrawLine(Pens.DarkGray,
new Point(this.ClientRectangle.Left, this.ClientRectangle.Top),
new Point(this.ClientRectangle.Left, this.ClientRectangle.Height - PenWidth));
g.DrawLine(Pens.White,
new Point(this.ClientRectangle.Left, this.ClientRectangle.Height - PenWidth),
new Point(this.ClientRectangle.Width - PenWidth, this.ClientRectangle.Height - PenWidth));
g.DrawLine(Pens.White,
new Point(this.ClientRectangle.Width - PenWidth, this.ClientRectangle.Top),
new Point(this.ClientRectangle.Width - PenWidth, this.ClientRectangle.Height - PenWidth));
}
}
推荐答案
在上面的代码中,以这种方式创建的进度矩形:
In above code the progress rectangle created this way:
float percent = (float)(val - min) / (float)(max - min);
Rectangle rect = this.ClientRectangle;
rect.Width = (int)((float)rect.Width * percent);
您可以简单地将代码更改为以下代码,以填充控件右侧的进度矩形:
You can simply change the code to below code, to fill the progress rectangle from right side of the control:
float percent = (float)(val - min) / (float)(max - min);
Rectangle rect = this.ClientRectangle;
var w = (int)((float)rect.Width * percent);
rect.X = rect.Width - w;
rect.Width = w;
这篇关于下面的代码中从右到左的布局属性的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!