下载了一套DevExpress控件，看了软件的DEMO，我也想在自己的程序中加一个Pie2DControl控件。似乎有这么几个问题，请高手们给点指导。
<local:ChartsDemoModule x:Class="ChartsDemo.Pie2DControl" Height="400" Width="800"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core"
xmlns:dxdb="http://schemas.devexpress.com/winfx/2008/xaml/demobase"
xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts"
xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors"
xmlns:local="clr-namespace:ChartsDemo"
ModuleAppear="ChartsDemoModule_ModuleAppear">
<local:ChartsDemoModule.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/ChartsDemo;component/Themes/Generic.xaml" />
</ResourceDictionary.MergedDictionaries>
<local:DemoValuesProvider x:Key="DemoValuesProvider" />
<local:Pie2DKindToPie2DModelConverter x:Key="Pie2DKindToPie2DModelConverter" />
</ResourceDictionary>
</local:ChartsDemoModule.Resources>
<dxdb:DemoModuleControl>
<dxdb:DemoModuleControl.OptionsContent>
<StackPanel MinWidth="130">
<dxe:CheckEdit Name="chbVisible" Content="Show Labels" Margin="0,0,0,10" IsChecked="True" />
<dx:GroupFrame Header="Position" Margin="0,2,0,10" IsEnabled="{Binding ElementName=chbVisible, Path=IsChecked}">
<dxe:ListBoxEdit Name="lbPosition"
Background="{x:Null}"
ShowBorder="False"
SelectedIndex="0"
>
<dxc:PieLabelPosition>Outside</dxc:PieLabelPosition>
<dxc:PieLabelPosition>Inside</dxc:PieLabelPosition>
<dxe:ListBoxEdit.StyleSettings>
<dxe:RadioListBoxEditStyleSettings />
</dxe:ListBoxEdit.StyleSettings>
</dxe:ListBoxEdit>
</dx:GroupFrame>
<dx:GroupFrame Header="Hole Radius Percent" Margin="0,0,0,10">
<StackPanel>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Text="0" HorizontalAlignment="Left" />
<TextBlock Grid.Column="1" Text="50" HorizontalAlignment="Center" />
<TextBlock Grid.Column="2" Text="100" HorizontalAlignment="Right" />
</Grid>
<dxe:TrackBarEdit Name="slHoleRadiusPercent" Value="0" Minimum="0" Maximum="100">
<dxe:TrackBarEdit.TickPlacement>None</dxe:TrackBarEdit.TickPlacement>
</dxe:TrackBarEdit>
</StackPanel>
</dx:GroupFrame>
<dx:GroupFrame Header="Sweep Direction" Margin="0,0,0,10">
<dxe:ListBoxEdit Name="rblSweepDirection"
Background="{x:Null}"
ShowBorder="False"
SelectedIndex="0"
SelectedIndexChanged="rblSweepDirection_SelectedIndexChanged">
<dxc:PieSweepDirection>Counterclockwise</dxc:PieSweepDirection>
<dxc:PieSweepDirection>Clockwise</dxc:PieSweepDirection>
<dxe:ListBoxEdit.StyleSettings>
<dxe:RadioListBoxEditStyleSettings />
</dxe:ListBoxEdit.StyleSettings>
</dxe:ListBoxEdit>
</dx:GroupFrame>
<dx:GroupFrame Header="Rotation" Margin="0,0,0,10">
<StackPanel>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Text="-360" HorizontalAlignment="Left" />
<TextBlock Grid.Column="1" Text="0" HorizontalAlignment="Center" />
<TextBlock Grid.Column="2" Text="360" HorizontalAlignment="Right" />
</Grid>
<dxe:TrackBarEdit Name="slRotation" Value="0" Minimum="-360" Maximum="360">
<dxe:TrackBarEdit.TickPlacement>None</dxe:TrackBarEdit.TickPlacement>
</dxe:TrackBarEdit>
</StackPanel>
</dx:GroupFrame>
<dx:GroupFrame Header="Model" Margin="0,2,0,10">
<dxe:ListBoxEdit Name="lbModel"
Background="{x:Null}"
ShowBorder="False"
ItemsSource="{Binding PredefinedPie2DKinds, Source={StaticResource DemoValuesProvider}}">
<dxe:ListBoxEdit.StyleSettings>
<dxe:RadioListBoxEditStyleSettings />
</dxe:ListBoxEdit.StyleSettings>
</dxe:ListBoxEdit>
</dx:GroupFrame>
</StackPanel>
</dxdb:DemoModuleControl.OptionsContent>
<Grid>
<dxc:ChartControl Name="chart" MouseUp="chart_MouseUp" MouseDown="chart_MouseDown" BorderThickness="0"
QueryChartCursor="chart_QueryChartCursor" MouseMove="chart_MouseMove" EnableAnimation="True">
<dxc:ChartControl.Diagram>
<dxc:SimpleDiagram2D>
<dxc:SimpleDiagram2D.Series>
<dxc:PieSeries2D x:Name="Series" ArgumentScaleType="Qualitative" AnimationAutoStartMode="SetStartState"
HoleRadiusPercent="{Binding ElementName=slHoleRadiusPercent, Path=Value}"
Rotation="{Binding ElementName=slRotation, Path=Value}"
SweepDirection="{Binding ElementName=rblSweepDirection, Path=SelectedItem}"
Model="{Binding ElementName=lbModel, Path=SelectedItem, Converter={StaticResource Pie2DKindToPie2DModelConverter}}">
<dxc:PieSeries2D.PointAnimation>
<dxc:Pie2DFlyInAnimation Duration="0:0:1.5" PointOrder="Random" />
</dxc:PieSeries2D.PointAnimation>
<dxc:PieSeries2D.PointOptions>
<dxc:PointOptions PointView="ArgumentAndValues">
<dxc:PointOptions.ValueNumericOptions>
<dxc:NumericOptions Format="Percent" Precision="0" />
</dxc:PointOptions.ValueNumericOptions>
</dxc:PointOptions>
</dxc:PieSeries2D.PointOptions>
<dxc:PieSeries2D.Label>
<dxc:SeriesLabel Visible="{Binding ElementName=chbVisible, Path=IsChecked}"
dxc:PieSeries.LabelPosition="{Binding ElementName=lbPosition, Path=SelectedItem}"
RenderMode="RectangleConnectedToCenter"
/>
</dxc:PieSeries2D.Label>
<dxc:PieSeries2D.Points>
<dxc:SeriesPoint Argument="USA" Value="100" />
<dxc:SeriesPoint Argument="Canada" Value="100" />
<dxc:SeriesPoint Argument="Russia" Value="100" />
<!--<dxc:SeriesPoint Argument="Others" Value="81.2" />-->
<dxc:SeriesPoint Argument="India" Value="100" />
<dxc:SeriesPoint Argument="Australia" Value="100" />
<dxc:SeriesPoint Argument="Brazil" Value="100" />
<dxc:SeriesPoint Argument="China" Value="100" />
</dxc:PieSeries2D.Points>
</dxc:PieSeries2D>
</dxc:SimpleDiagram2D.Series>
</dxc:SimpleDiagram2D>
</dxc:ChartControl.Diagram>
<dxc:ChartControl.Titles>
<dxc:Title Dock="Top" HorizontalAlignment="Center" FontSize="24">Area of Countries</dxc:Title>
<dxc:Title Dock="Bottom" HorizontalAlignment="Right" FontSize="12" Foreground="Silver" Margin="0,10,0,0">From www.nationmaster.com</dxc:Title>
</dxc:ChartControl.Titles>
</dxc:ChartControl>
</Grid>
</dxdb:DemoModuleControl>
</local:ChartsDemoModule>
后台代码：
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media.Animation;
using DevExpress.Xpf.Charts;
namespace ChartsDemo {
public partial class Pie2DControl : ChartsDemoModule {
const int clickDelta = 200;
DateTime mouseDownTime;
bool rotate;
Point startPosition;
public override ChartControl ActualChart { get { return chart; } }
public Pie2DControl() {
InitializeComponent();
lbModel.SelectedItem = Pie2DModelKindHelper.FindActualPie2DModelKind(typeof(SimplePie2DModel));
}
bool IsClick(DateTime mouseUpTime) {
return (mouseUpTime - mouseDownTime).TotalMilliseconds < clickDelta;
}
double CalcAngle(Point p1, Point p2) {
Point center = new Point(chart.Diagram.ActualWidth / 2, chart.ActualHeight / 2);
Point relativeP1 = new Point(p1.X - center.X, p1.Y - center.Y);
Point relativeP2 = new Point(p2.X - center.X, p2.Y - center.Y);
double angleP1Radian = Math.Atan2(relativeP1.X, relativeP1.Y);
double angleP2Radian = Math.Atan2(relativeP2.X, relativeP2.Y);
double angle = (angleP2Radian - angleP1Radian) * 180 / (Math.PI * 2);
if (angle > 90)
angle = 180 - angle;
else if (angle < -90)
angle = 180 + angle;
return angle;
}
void chart_MouseUp(object sender, MouseButtonEventArgs e) {
ChartHitInfo hitInfo = chart.CalcHitInfo(e.GetPosition(chart));
rotate = false;
if (hitInfo == null || hitInfo.SeriesPoint == null || !IsClick(DateTime.Now))
return;
double distance = PieSeries.GetExplodedDistance(hitInfo.SeriesPoint);
Storyboard storyBoard = new Storyboard();
DoubleAnimation animation = new DoubleAnimation();
animation.Duration = new Duration(new TimeSpan(0, 0, 0, 0, 300));
animation.To = distance > 0 ? 0 : 0.3;
storyBoard.Children.Add(animation);
Storyboard.SetTarget(animation, hitInfo.SeriesPoint);
Storyboard.SetTargetProperty(animation, new PropertyPath(PieSeries.ExplodedDistanceProperty));
storyBoard.Begin();
}
void chart_MouseDown(object sender, MouseButtonEventArgs e) {
mouseDownTime = DateTime.Now;
Point position = e.GetPosition(chart);
ChartHitInfo hitInfo = chart.CalcHitInfo(position);
if (hitInfo != null && hitInfo.SeriesPoint != null) {
rotate = true;
startPosition = position;
}
}
void chart_MouseMove(object sender, MouseEventArgs e) {
Point position = e.GetPosition(chart);
ChartHitInfo hitInfo = chart.CalcHitInfo(position);
if (hitInfo == null)
return;
if (rotate && !IsClick(DateTime.Now)) {
PieSeries2D series = chart.Diagram.Series[0] as PieSeries2D;
double angleDelta = CalcAngle(startPosition, position);
if (Math.Abs(slRotation.Value + angleDelta) < 360)
slRotation.Value += angleDelta;
else if (slRotation.Value + angleDelta > 360)
slRotation.Value = -360;
else
slRotation.Value = 360;
startPosition = position;
}
}
void ChartsDemoModule_ModuleAppear(object sender, RoutedEventArgs e) {
chart.Animate();
}
void rblSweepDirection_SelectedIndexChanged(object sender, RoutedEventArgs e) {
if (chart != null)
chart.Animate();
}
void chart_QueryChartCursor(object sender, QueryChartCursorEventArgs e) {
ChartHitInfo hitInfo = chart.CalcHitInfo(e.Position);
if (hitInfo != null && hitInfo.SeriesPoint != null)
e.Cursor = Cursors.Hand;
}
}
}
1.xaml中开始那一句<local:ChartsDemoModule x:Class="ChartsDemo.Pie2DControl" Height="400" Width="800" ；他这个应该是指本地后台代码的Pie2DControl的父类ChartsDemoModule还是什么意思？如果是要在<window></window>中使用这个控件，该怎么办呢？
2.我照着他的DEMO自己做的时候，提示我少了引用控件，但是我添加了，还是不能自动识别<dxc:中控件名称。
3.xaml中 ModuleAppear="ChartsDemoModule_ModuleAppear" 这前面这个ModuleAppear是什么意思？
没有鞋子的人很多，但聪明的人会想到借，因为这样要比赤脚跑得快。
求高手指导DevExpress控件中Pie2DControl控件
