namespace Yw.WinFrmUI.HydroL2d
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{
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/// <summary>
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/// 管网面板
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/// </summary>
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public partial class NetworkPanel : Panel
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{
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public NetworkPanel()
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{
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InitializeComponent();
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#region 防止闪烁
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SetStyle(ControlStyles.AllPaintingInWmPaint, true);
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SetStyle(ControlStyles.DoubleBuffer, true);
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SetStyle(ControlStyles.UserPaint, true);
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#endregion
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//设置允许的最小尺寸
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this.MinimumSize = new Size(10, 10);
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}
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private Network _network = null;//管网
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private Bitmap _cache = null;//绘制缓存
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private float _zoomMin = 1;//最小缩放层级
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private float _zoomMax = 3200;//最大缩放层级
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private float _zoom = 1;//当前缩放层级
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private float _dxo = 0;//x偏移量
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private float _dyo = 0;//y偏移量
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/// <summary>
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/// 是否初始化
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/// </summary>
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public bool Initialized => _network != null;
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/// <summary>
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/// 初始化
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/// </summary>
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public virtual void Initial(Network network)
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{
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_network = network;
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ZoomAll();
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}
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protected override void OnPaint(PaintEventArgs e)
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{
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base.OnPaint(e);
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if (!Initialized)
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{
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return;
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}
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try
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{
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e.Graphics.PageUnit = GraphicsUnit.Pixel;
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e.Graphics.InterpolationMode = InterpolationMode.High;
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e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
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e.Graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
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e.Graphics.PageScale = _zoom;
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e.Graphics.TranslateTransform(_dxo, _dyo);
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e.Graphics.ScaleTransform(1, -1);
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}
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catch
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{
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return;
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}
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_network.Draw(e.Graphics);
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}
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/// <summary>
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/// 界面尺寸发生改变
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/// </summary>
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/// <param name="eventargs"></param>
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protected override void OnResize(EventArgs eventargs)
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{
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base.OnResize(eventargs);
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ZoomAll();
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}
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/// <summary>
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/// 释放资源
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/// </summary>
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protected virtual void DisposeResources()
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{
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if (_cache != null)
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{
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_cache.Dispose();
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}
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}
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/// <summary>
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/// 自适应
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/// </summary>
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public void ZoomAll()
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{
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if (!Initialized)
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{
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return;
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}
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float w = Width;
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float h = Height;
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var networkBounds = _network.GetBounds();
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if (networkBounds.IsEmpty)
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{
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return;
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}
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_zoom = networkBounds.Width / networkBounds.Height < w / h ?
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h / networkBounds.Height :
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w / networkBounds.Width;
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_dxo = -networkBounds.X;
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_dyo = networkBounds.Bottom;
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_zoom *= 0.95f;
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_dxo += w * 0.5f / _zoom - networkBounds.Width * 0.5f;
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_dyo += h * 0.5f / _zoom - networkBounds.Height * 0.5f;
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Invalidate();
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}
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}
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}
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