Install 1) Visual Web Developer 2010 Express Edition English
and 2) Silverlight 4 Tools for Visual Studio 2010.
Preliminaries
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Guidance for Visual Web Developer 2010 Express:
1) Main Menu after start of VWD Express: Tools → Options → check lower left checkbox: Show all Settings →
→ Projects and Solutions → Projects location: → C:\temp.
→ Text Editor (double click) → All Languages (double click) → Tabs →
Indenting: None → Tab size: 2 → Insert spaces.
→ Text Editor (double click) → C# (double click) → Formatting → uncheck all three check boxes → OK.
→ Text Editor (double click) → XAML (double click) → Tabs →
Indenting: None → Tab size: 1, Indent size: 1 → Insert spaces.
→ Text Editor (double click) → XAML (double click) → Formatting → uncheck all Auto-Formatting Events → OK.
2) Main Menu after start of VWD Express: File → New Project... → Project types: Visual C# (double click) → Silverlight → Templates: Silverlight Application
Name: SL_intro1 → Location: C:\temp\SLProjects → Create directory for solution: switch off → OK.
An Add Silverlight Application-Window appears.
Choose "Automatically generate a test page to host Silverlight at build time" → OK.
The Solution Explorer - SL_intro1 window appears as shown on the right.
Replace the default code of Page.xaml and Page.xaml.cs by the codes of Page.xaml and Page.xaml.cs which follow. | |
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Page.xaml
<UserControl x:Class="SL_intro1.Page"
xmlns="http://schemas.microsoft.com/client/2007"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="380" Height="380" x:Name="user_control">
<Grid Background="Cornsilk">
<Grid.ColumnDefinitions>
<ColumnDefinition x:Name="left_column" Width="90"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Button x:Name="draw_area" Grid.Column="1" Background="White"
Padding="0,0,0,0" Loaded="on_draw_area_loaded">
<Polygon x:Name="polygon" Stroke="Black" Fill="Black"/>
</Button>
<StackPanel Grid.Column="0" Orientation="Vertical" Margin="3">
<Button x:Name="start_button" Content="Start" Click="on_start_button_click"/>
<Button x:Name="stop_button" Content="Stop" Click="on_stop_button_click"/>
<Button x:Name="clear_button" Content="Clear" Click="on_clear_button_click"/>
<TextBlock Text="Speed" FontSize="10" HorizontalAlignment="Center"/>
<Slider x:Name="time_interval_slider" Minimum="0" Maximum="1000" Value="0"
ValueChanged="on_time_interval_slider_value_changed"
IsDirectionReversed="True"/>
<TextBlock Text="Opacity" FontSize="10" HorizontalAlignment="Center" />
<Slider x:Name="opacity_slider" Minimum="0" Maximum="1" Value="1"
ValueChanged="on_opacity_slider_value_changed" />
<StackPanel Height="10" /><!--empty space-->
<StackPanel Background="red" >
<Slider x:Name="red_slider" Minimum="0" Maximum="255" Value="0"
ValueChanged="on_color_slider_value_changed" />
</StackPanel>
<StackPanel Background="green" >
<Slider x:Name="green_slider" Minimum="0" Maximum="255" Value="0"
ValueChanged="on_color_slider_value_changed" />
</StackPanel>
<StackPanel Background="blue" >
<Slider x:Name="blue_slider" Minimum="0" Maximum="255" Value="0"
ValueChanged="on_color_slider_value_changed" />
</StackPanel>
<StackPanel Height="10" /><!--empty space-->
<TextBlock x:Name="textblock_polygon_points" Text="Vertices: 100" FontSize="10" HorizontalAlignment="Center" />
<Slider x:Name="no_of_polygon_points_slider" Minimum="3" Maximum="200" Value="100"
ValueChanged="on_no_of_polygon_points_slider_value_changed" />
<StackPanel Height="10" /><!--empty space-->
<RadioButton Content="Wire Frame"
Click="on_radio_button_fill_mode_wire_frame_click" />
<RadioButton Content="Filled" IsChecked="True"
Click="on_radio_button_fill_mode_filled_click" />
</StackPanel>
</Grid>
</UserControl>
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Page.xaml.cs
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Shapes;
using System.Windows.Threading;
using System.Windows.Media;
namespace SL_intro1 {
public partial class Page : UserControl
{ Random r = new Random();
int no_of_polygon_points = 100;
DispatcherTimer timer = new DispatcherTimer();
double w, h;
public Page()
{ InitializeComponent();
timer.Tick += new EventHandler(on_timer);
}
private void on_draw_area_loaded(object sender, EventArgs e)
{ draw_area.Width = user_control.Width - 90;
draw_area.Height = user_control.Height;
w = draw_area.Width - draw_area.Padding.Left
- draw_area.Padding.Right;
h = draw_area.Height - draw_area.Padding.Top
- draw_area.Padding.Bottom;
for (int i = 0; i < no_of_polygon_points; i++)
polygon.Points.Add(new Point(w * r.NextDouble(),
h * r.NextDouble()));
}
private void on_start_button_click(object sender, EventArgs e)
{ timer.Start();
}
private void on_stop_button_click(object sender, EventArgs e)
{ timer.Stop();
}
private void on_clear_button_click(object sender, EventArgs e)
{ timer.Stop();
draw_area.Content = null;
}
public void on_timer(object sender, EventArgs e)
{ int i = r.Next(no_of_polygon_points);
polygon.Points.RemoveAt(i);
polygon.Points.Insert(i, new Point(w * r.NextDouble(),
h * r.NextDouble()));
draw_area.Content = 0;
draw_area.Content = polygon;
}
public void on_time_interval_slider_value_changed
(object sender, EventArgs e)
{ int milliseconds = (int)time_interval_slider.Value;
timer.Interval = new TimeSpan(0, 0, 0, 0, milliseconds);
}
public void on_opacity_slider_value_changed
(object sender, EventArgs e)
{ try {
polygon.Stroke.Opacity = opacity_slider.Value;
polygon.Fill.Opacity = opacity_slider.Value;
} catch { }
}
public void on_color_slider_value_changed
(object sender, EventArgs e)
{ SolidColorBrush brush = (SolidColorBrush)polygon.Fill;
Color c = brush.Color;
switch (((Slider)sender).Name)
{ case "red_slider" : c.R = (byte)red_slider.Value; break;
case "green_slider": c.G = (byte)green_slider.Value; break;
case "blue_slider" : c.B = (byte)blue_slider.Value; break;
}
brush = new SolidColorBrush(c);
polygon.Stroke = polygon.Fill = brush;
draw_area.Content = 0;
draw_area.Content = polygon;
}
public void on_no_of_polygon_points_slider_value_changed
(object sender, EventArgs e)
{ try {
no_of_polygon_points = (int)no_of_polygon_points_slider.Value;
textblock_polygon_points.Text = "Vertices: " +
no_of_polygon_points.ToString();
polygon.Points.Clear();
w = draw_area.ActualWidth - 8;
h = draw_area.ActualHeight - 8;
for (int i = 0; i < no_of_polygon_points; i++)
polygon.Points.Add(new Point(w * r.NextDouble(),
h * r.NextDouble()));
draw_area.Content = 0;
draw_area.Content = polygon;
} catch { }
}
public void on_radio_button_fill_mode_wire_frame_click
(object sender, EventArgs e)
{ polygon.Fill = draw_area.Background;
draw_area.Content = 0;
draw_area.Content = polygon;
}
public void on_radio_button_fill_mode_filled_click
(object sender, EventArgs e)
{ polygon.Fill = polygon.Stroke;
draw_area.Content = 0;
draw_area.Content = polygon;
}
}
} //end of namespace
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