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#if NETFX || NETCORE
using System;using System.Collections.Generic;using System.ComponentModel;using System.Drawing;using System.Data;using System.Text;using System.Windows.Forms;using System.IO;
namespace Apewer.Surface{
/// <summary>
///
/// </summary>
public class BlockImageViewer : BaseControl {
private PictureBox _picture = new PictureBox(); private Point _start = new Point(0, 0); private Point _flow; private int _padding = 0; private bool _moving = false; private bool _inimage = false;
/// <summary>
///
/// </summary>
public BlockImageViewer() { this.Controls.Add(_picture);
this.Dock = DockStyle.Fill; this.BackColor = FormsUtility.GraceWall;
_picture.Location = new Point(0, 0); _picture.Size = Size; _picture.BackColor = FormsUtility.GraceWall;
Stretch = true; _flow = new Point(this.Width - _picture.Left, this.Height - _picture.Top);
Adjust();
this.BackColorChanged += Event_This_BackColorChanged; this.Resize += Event_Main_Resize; this.MouseEnter += Event_This_MouseEnter; MouseDown += Event_Picture_Down; MouseMove += Event_Picture_Move; MouseUp += Event_Picture_Up; MouseWheel += Event_Main_Wheel; _picture.MouseDown += Event_Picture_Down; _picture.MouseMove += Event_Picture_Move; _picture.MouseUp += Event_Picture_Up; _picture.MouseWheel += Event_Picture_Wheel; _picture.MouseHover += Event_Picture_Hover; _picture.MouseLeave += Event_Picture_Leave; }
private void Event_This_MouseEnter(object sender, EventArgs e) { if (this.IsHandleCreated) this.Focus(); }
private void Event_This_BackColorChanged(object sender, EventArgs e) { _picture.BackColor = this.BackColor; }
private void Event_Picture_Hover(object sender, EventArgs e) { _inimage = true; }
private void Event_Picture_Leave(object sender, EventArgs e) { _inimage = false; }
private void Event_Main_Wheel(object sender, MouseEventArgs e) { if (!_inimage) { int vp = BodyPadding; int vw, vh, vl, vt; vl = _picture.Width / 2 + _picture.Left; vt = _picture.Height / 2 + _picture.Top; if (e.Delta > 0) { vw = (int)(_picture.Width * 1.2); vh = (int)(_picture.Height * 1.2); if (vw > (this.Width * 10)) { vw = this.Width * 10; vh = this.Height * 10; } } else { vw = (int)(_picture.Width * 0.8); vh = (int)(_picture.Height * 0.8); if (vw < (this.Width * 0.5)) { vw = (int)(this.Width * 0.5); vh = (int)(this.Height * 0.5); } } _picture.Size = new Size(vw, vh); _picture.Left = (int)(vl - _picture.Width / 2); _picture.Top = (int)(vt - _picture.Height / 2); } }
private void Event_Picture_Wheel(object sender, MouseEventArgs e) { int vp = BodyPadding; int vw, vh, vl, vt; double vx, vy; vx = (double)e.X / (double)_picture.Width; vy = (double)e.Y / (double)_picture.Height; vl = e.X + _picture.Left; vt = e.Y + _picture.Top; if (e.Delta > 0) { vw = (int)(_picture.Width * 1.2); vh = (int)(_picture.Height * 1.2); if (vw > (this.Width * 10)) { vw = this.Width * 10; vh = this.Height * 10; } } else { vw = (int)(_picture.Width * 0.8); vh = (int)(_picture.Height * 0.8); if (vw < (this.Width * 0.5)) { vw = (int)(this.Width * 0.5); vh = (int)(this.Height * 0.5); } } _picture.Size = new Size(vw, vh); _picture.Left = (int)(vl - _picture.Width * vx); _picture.Top = (int)(vt - _picture.Height * vy); }
private void Event_Picture_Down(object sender, MouseEventArgs e) { switch (e.Button) { case MouseButtons.Left: _start.X = Cursor.Position.X - _picture.Left; _start.Y = Cursor.Position.Y - _picture.Top; _moving = true; break; case MouseButtons.Right: _moving = false; Adjust(); break; } }
private void Event_Picture_Move(object sender, MouseEventArgs e) { if (_moving) { _picture.Left = Cursor.Position.X - _start.X; _picture.Top = Cursor.Position.Y - _start.Y; } }
private void Event_Picture_Up(object sender, MouseEventArgs e) { switch (e.Button) { case MouseButtons.Left: _moving = false; break; } }
private void Event_Main_Resize(object sender, EventArgs e) { Adjust(); }
/// <summary>
///
/// </summary>
public void Adjust() { int vp = BodyPadding; _picture.Width = this.Width - vp * 2; _picture.Height = this.Height - vp * 2; _picture.Location = new Point(vp, vp); }
/// <summary>
///
/// </summary>
public int BodyPadding { get { int vw = this.Width / 2 - 2; int vh = this.Height / 2 - 2; int vm = (vw > vh) ? vh : vw; return (_padding > vm) ? vm : _padding; } set { if (value >= 0) _padding = value; } }
/// <summary>
///
/// </summary>
public Image GetImage() { return _picture.BackgroundImage; }
/// <summary>
///
/// </summary>
public void LoadImage(byte[] image) { Clear();
if (image.Length < 1) return; if (!this.IsHandleCreated) return; if (!_picture.IsHandleCreated) return;
Invoke(new Invoker(delegate () { var memory = new MemoryStream(image); var bitmap = new Bitmap(memory); _picture.BackgroundImage = bitmap; })); }
/// <summary>
///
/// </summary>
public void LoadImage(Image image) { Clear(); _picture.BackgroundImage = image; }
/// <summary></summary>
public void LoadImage(string path) { if (File.Exists(path)) { try { var vdata = File.ReadAllBytes(path); LoadImage(vdata); } catch { Clear(); } } else { Clear(); } }
/// <summary>
///
/// </summary>
public void Clear() { if (_picture.BackgroundImage != null) _picture.BackgroundImage.Dispose(); _picture.BackgroundImage = null; }
/// <summary>
///
/// </summary>
public void Clean() { Clear(); }
/// <summary>
///
/// </summary>
public bool Stretch { get { return (_picture.BackgroundImageLayout == ImageLayout.Stretch) ? true : false; } set { if (value) _picture.BackgroundImageLayout = ImageLayout.Stretch; else _picture.BackgroundImageLayout = ImageLayout.Zoom; } }
/// <summary>
///
/// </summary>
public Size ImageSize { get { if (_picture.BackgroundImage != null) return _picture.BackgroundImage.Size; else return new Size(0, 0); } }
}}
#endif
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