标签：const ++ xmlns 一个 cos radius info bit star
原文:WPF 如何画一颗心
如何用WPF画一个心。
MainWindow.xaml
"Heart.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:Heart"
mc:Ignorable="d"
Title="MainWindow" Height="600" Width="800">
"66*"/>
"74*"/>
"77*"/>
"98*"/>
"69*"/>
"62*"/>
"72*"/>
"52*"/>
"134*"/>
"525*"/>
"134*"/>
MainWindow.xaml.cs
using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Imaging;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Runtime.InteropServices;
using System.Threading;
namespace Heart
{
///
/// MainWindow.xaml 的交互逻辑
///
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
imageList = new List();
imageList1 = new List();
CreateHeartLine(true);
CreateHeartLine(false);
m_iImageCount = imageList.Count;
}
private int maxStep = 50;
private double radius;
private double centerPt;
private Bitmap m_Snow;
private Bitmap m_Snow1;
private int m_iImageCount = 0;
private List imageList = null;
private List imageList1 = null;
[DllImport("gdi32")]
static extern int DeleteObject(IntPtr o);
private BitmapSource GetBitmapSource(Bitmap bitmap)
{
IntPtr inptr = bitmap.GetHbitmap();
BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
inptr, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
DeleteObject(inptr);
return bitmapSource;
}
private void SetImageSoure(System.Windows.Controls.Image img , Bitmap mSnow)
{
BitmapSource bitmapSource = GetBitmapSource(mSnow);
img.Source = bitmapSource;
}
private void CreateHeartLine(bool bShow)
{
centerPt = canvas_Shape.Width / 2;
radius = canvas_Shape.Width / 6;
for (int i = 0; i )
{
System.Windows.Controls.Image img = new System.Windows.Controls.Image();
BitmapSource bitmapSource;
if (bShow)
{
bitmapSource = GetBitmapSource(Snow);
img.Source = bitmapSource;
img.Visibility = Visibility.Hidden;
imageList.Add(img);
}
else
{
bitmapSource = GetBitmapSource(Snow1);
img.Source = bitmapSource;
imageList1.Add(img);
}
double angle = 2 * Math.PI / maxStep * i;
double r = 2 * radius * (1 - Math.Sin(angle));
//桃形心
double x = centerPt - 16 * (Math.Sin(angle) * Math.Sin(angle) * Math.Sin(angle)) * 10;//
double y = centerPt - (13 * Math.Cos(angle) - 5 * Math.Cos(2 * angle) - 2 * Math.Cos(3 * angle) - Math.Cos(4 * angle)) * 10;//
Canvas.SetLeft(img, x);
Canvas.SetTop(img, y);
canvas_Shape.Children.Add(img);
}
}
private Bitmap Snow
{
get
{
if (m_Snow == null)
{
m_Snow = new Bitmap(32, 32);
using (Graphics g = Graphics.FromImage(m_Snow))
{
g.SmoothingMode = SmoothingMode.AntiAlias;
g.Clear(System.Drawing.Color.Transparent);
g.TranslateTransform(16, 16, MatrixOrder.Append);
System.Drawing.Color black = System.Drawing.Color.FromArgb(255, 255, 255);
System.Drawing.Color white = System.Drawing.Color.FromArgb(255, 0, 255);
DrawSnow(g, new SolidBrush(black), new System.Drawing.Pen(black, 3f));
DrawSnow(g, new SolidBrush(white), new System.Drawing.Pen(white, 2f));
g.Save();
}
}
return m_Snow;
}
}
private Bitmap Snow1
{
get
{
if (m_Snow1 == null)
{
m_Snow1 = new Bitmap(32, 32);
using (Graphics g = Graphics.FromImage(m_Snow1))
{
g.SmoothingMode = SmoothingMode.AntiAlias;
g.Clear(System.Drawing.Color.Transparent);
g.TranslateTransform(16, 16, MatrixOrder.Append);
System.Drawing.Color black = System.Drawing.Color.FromArgb(255, 255, 255);
System.Drawing.Color white = System.Drawing.Color.FromArgb(254, 194, 253);
DrawSnow(g, new SolidBrush(black), new System.Drawing.Pen(black, 3f));
DrawSnow(g, new SolidBrush(white), new System.Drawing.Pen(white, 2f));
g.Save();
}
}
return m_Snow1;
}
}
private static void DrawSnow(Graphics g, System.Drawing.Brush b, System.Drawing.Pen p)
{
const int a = 6;
const int a2 = a + 2;
const int r = 2;
g.DrawLine(p, -a, -a, +a, +a);
g.DrawLine(p, -a, +a, +a, -a);
g.DrawLine(p, -a2, 0, +a2, 0);
g.DrawLine(p, 0, -a2, 0, +a2);
g.FillEllipse(b, -r, -r, r * 2, r * 2);
}
private void ButtonStart_Click(object sender, RoutedEventArgs e)
{
Thread thread = new Thread(ShowImageList);
thread.SetApartmentState(ApartmentState.STA);
thread.IsBackground = true;
thread.Start();
}
private void ShowImageList()
{
while (true)
{
for (int i = 0; i )
{
this.Dispatcher.Invoke((Action)(() =>
{
ShowImageIndex(i);
}));
Thread.Sleep(100);
}
}
}
private void ShowImageIndex(int index)
{
if (imageList1[index].Visibility == Visibility.Visible)
{
imageList1[index].Visibility = Visibility.Hidden;
imageList[index].Visibility = Visibility.Visible;
}
else
{
imageList1[index].Visibility = Visibility.Visible;
imageList[index].Visibility = Visibility.Hidden;
}
}
}
}
效果如下：
WPF 如何画一颗心
标签：const ++ xmlns 一个 cos radius info bit star
原文地址：https://www.cnblogs.com/lonelyxmas/p/9706961.html