WPF 画心2.0版之元旦快乐

 2017年元旦已经到了，想做一个祝福语的窗口，就把上一篇画心的程序改了改，变成了如下界面。

  

说下改动的地方，首先窗口没有标题栏了。

MainWindow.xaml

  AllowsTransparency="True"
  MouseDoubleClick="Window_MouseDoubleClick"
  WindowStyle="None" Background="#00FFFFFF" Loaded="Window_Loaded" MouseMove="Window_MouseMove"
  Title="MainWindow" Height="700" Width="900"

中间圆形按钮的样式

<Style TargetType="Button" x:Key="ButtonStyle">
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="Button">
                            <Grid>
                                <Ellipse Width="200" Height="200">
                                    <Ellipse.Fill>
                                        <LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
                                            <GradientStop Offset="0" Color="blue"/>
                                            <GradientStop Offset="1" Color="LightBlue"/>
                                        </LinearGradientBrush>
                                    </Ellipse.Fill>
                                </Ellipse>
                                <Ellipse Width="180" Height="180">
                                    <Ellipse.Fill>
                                        <LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
                                            <GradientStop Offset="0" Color="White"/>
                                            <GradientStop Offset="1" Color="Transparent"/>
                                        </LinearGradientBrush>
                                    </Ellipse.Fill>
                                </Ellipse>
                                <ContentControl VerticalAlignment="Center" HorizontalAlignment="Center" Content="{TemplateBinding Content}" 
                                     FontSize="20" FontWeight="Bold" Foreground="Red"/>
                            </Grid>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>

虽然没有了标题栏，为了能够让窗口自由移动

      private void Window_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.LeftButton == MouseButtonState.Pressed)
            {
                this.DragMove();
            }
        }

双击鼠标，关闭窗口

        private void Window_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
           this.Close();
        }

不再使用线程睡眠的方式来动态显示心的生成，这次采用计时器。

      private DispatcherTimer timer = new DispatcherTimer();//创建定时器对象  

        public MainWindow()
        {
            InitializeComponent();

            WindowStartupLocation = WindowStartupLocation.CenterScreen;

            this.bendediction.Content = "2017年\r\n元旦快乐";
            timer.Tick += new EventHandler(timer_Tick); //添加事件，定时到事件  
            timer.Interval = TimeSpan.FromMilliseconds(100);//设置定时长  
            timer.Start();
        }

        void timer_Tick(object sender, EventArgs e)
        {
            if (iTick < maxStep)
            {
                CreateHeartLine(iTick);
            }
            else
            {
                timer.Stop();
            }
            iTick++;
        }

　　本次心的生成算法，基本不变，只是把心的半径和位置调整了下。

        private void CreateHeartLine(int iTick)
        {
            centerPt = canvas_Shape.Width/ 4;
            radius = canvas_Shape.Width / 6;
            for (int i = 0; i < iTick; i++)
            {
                System.Windows.Controls.Image img = new System.Windows.Controls.Image();

                img.Source =  new BitmapImage(new Uri(@"image/" + 2 + ".png", UriKind.Relative));//给出照片路径  
                img.Height = 200;
                img.Width = 200;
                img.Stretch = Stretch.Fill;

                double angle = 2 * Math.PI / maxStep * i;

                //桃形心
                double x = centerPt - 16 * (Math.Sin(angle) * Math.Sin(angle) * Math.Sin(angle)) * 20;//
                double y = centerPt - (13 * Math.Cos(angle) - 5 * Math.Cos(2 * angle) - 2 * Math.Cos(3 * angle) - Math.Cos(4 * angle)) * 20;//
                Canvas.SetLeft(img, x);
                Canvas.SetTop(img, y);
                canvas_Shape.Children.Add(img);
            }
        }
     

为了添加背景音乐，使用了MediaElement。

       private void Window_Loaded(object sender, RoutedEventArgs e)
        {

            me.LoadedBehavior = MediaState.Manual;  //设置为手动控制  
            me.UnloadedBehavior = MediaState.Manual;
            string strPath = string.Format(@"{0}\data\music\bk.mp3", System.Windows.Forms.Application.StartupPath);
            Uri uri = new Uri(strPath, UriKind.Relative);
            me.Source = uri;

            me.IsHitTestVisible = true;
            me.MediaEnded += new RoutedEventHandler(me_MediaEnded);
            gd.Children.Add(me);
            me.Play();
        }

　为了能够循环播放

      private void me_MediaEnded(object sender, RoutedEventArgs e)
        {
            me.Stop();
            me.Play();
        }