381 lines
13 KiB
C#
381 lines
13 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Drawing;
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using System.Data;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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namespace pbox_zoom_control
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{
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public partial class pbox_zoom: UserControl
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{
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public event EventHandler Click2;
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public event MouseEventHandler Mouse_Move_pic;
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public event EventHandler Mouse_Hover_pic;
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public event EventHandler Mouse_Enter_pic;
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public event EventHandler Mouse_Leave_pic;
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private string path = "";
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private void HandleClick2(object sender, EventArgs e)
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{
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// we'll explain this in a minute
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this.OnClick2(EventArgs.Empty);
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}
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protected virtual void OnClick2(EventArgs e)
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{
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this.Click2?.Invoke(this, e);
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}
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private void HandleMouse_Move_pic(object sender, MouseEventArgs e)
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{
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// we'll explain this in a minute
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this.OnMouse_Move_pic(e);
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}
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private void OnMouse_Move_pic(MouseEventArgs e)
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{
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this.Mouse_Move_pic?.Invoke(this, e);
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}
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private void HandleMouse_Hover_pic(object sender, EventArgs e)
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{
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// we'll explain this in a minute
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this.OnMouse_Hover_pic(EventArgs.Empty);
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}
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protected virtual void OnMouse_Hover_pic(EventArgs e)
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{
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this.Mouse_Hover_pic?.Invoke(this, e);
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}
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private void HandleMouse_Enter_pic(object sender, EventArgs e)
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{
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// we'll explain this in a minute
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this.OnMouse_Enter_pic(EventArgs.Empty);
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}
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protected virtual void OnMouse_Enter_pic(EventArgs e)
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{
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this.Mouse_Enter_pic?.Invoke(this, e);
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}
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private void HandleMouse_Leave_pic(object sender, EventArgs e)
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{
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// we'll explain this in a minute
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this.OnMouse_Leave_pic(EventArgs.Empty);
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}
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protected virtual void OnMouse_Leave_pic(EventArgs e)
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{
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this.Mouse_Leave_pic?.Invoke(this, e);
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}
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private double ZOOMFACTOR = 1.25; // = 25% smaller or larger
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private int MINMAX = 10; // 5 times bigger or smaller than the ctrl
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private Bitmap bild;
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private int mouse_x = 0;
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private int mouse_y = 0;
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public pbox_zoom()
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{
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InitializeComponent();
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InitCtrl();
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}
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private void InitCtrl()
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{
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panel1.Cursor = System.Windows.Forms.Cursors.NoMove2D;
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panel1.MouseEnter += new EventHandler(pbox_1_MouseEnter);
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pbox_1.MouseEnter += new EventHandler(pbox_1_MouseEnter);
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panel1.MouseWheel += new MouseEventHandler(pbox_1_MouseWheel);
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pbox_1.Click += HandleClick2;
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pbox_1.MouseMove += HandleMouse_Move_pic;
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pbox_1.MouseHover += HandleMouse_Hover_pic;
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pbox_1.MouseEnter += HandleMouse_Enter_pic;
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pbox_1.MouseLeave += HandleMouse_Leave_pic;
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}
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public Bitmap Image
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{
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get
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{
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return bild;
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}
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set
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{
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open_picture(value);
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}
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}
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public double zoomfactor
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{
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get
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{
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return ZOOMFACTOR;
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}
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set
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{
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ZOOMFACTOR = value;
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}
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}
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public int minmax
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{
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get
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{
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return MINMAX;
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}
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set
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{
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MINMAX = value;
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}
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}
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public string ImageLocation
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{
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get
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{
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return path;
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}
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set
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{
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if(value != "" && value != null)
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open_picture(value);
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}
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}
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public Point Mouse_Position
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{
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get
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{
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return new Point(mouse_x,mouse_y);
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}
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}
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public int Mouse_X
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{
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get
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{
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return mouse_x;
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}
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}
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public int Mouse_Y
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{
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get
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{
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return mouse_y;
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}
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}
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public void open_picture(string pic_path)
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{
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bool save_position = false;
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Point position = new Point();
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Size size = new Size();
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Size old_size = new Size();
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if (pbox_1.Image != null)
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old_size = pbox_1.Image.Size;
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int v = 0;
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int h = 0;
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if (bild != null) bild.Dispose();
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bild = new Bitmap(pic_path);
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path = pic_path;
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if(bild != null && pbox_1.Image != null)
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if (bild.Size == old_size) save_position = true;
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if (save_position)
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{
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position = pbox_1.Location;
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size = pbox_1.Size;
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v = VerticalScroll.Value;
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h = HorizontalScroll.Value;
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}
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pbox_1.Image = bild;
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if (((double)bild.Width / (double)bild.Height) > ((double)panel1.Width / (double)panel1.Height))
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{
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pbox_1.Width = panel1.Width;
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pbox_1.Height = pbox_1.Width * bild.Height / bild.Width;
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}
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else
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{
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pbox_1.Height = panel1.Height;
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pbox_1.Width = pbox_1.Height * bild.Width / bild.Height;
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}
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if (save_position)
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{
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pbox_1.Location = position;
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pbox_1.Size = size;
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VerticalScroll.Value = v;
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HorizontalScroll.Value = h;
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}
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else
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{
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update_scrollbar();
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update_picture_position();
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}
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}
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public void open_picture(Bitmap Image)
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{
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bool save_position = false;
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Point position = new Point();
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Size size = new Size();
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Size old_size = new Size();
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if (pbox_1.Image != null)
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old_size = pbox_1.Image.Size;
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int v = 0;
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int h = 0;
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path = "";
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if (bild != null) bild.Dispose();
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bild = new Bitmap(Image);
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if (bild != null && pbox_1.Image != null)
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if (bild.Size == old_size) save_position = true;
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if (save_position)
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{
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position = pbox_1.Location;
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size = pbox_1.Size;
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v = VerticalScroll.Value;
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h = HorizontalScroll.Value;
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}
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pbox_1.Image = bild;
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if (((double)bild.Width / (double)bild.Height) > ((double)panel1.Width / (double)panel1.Height))
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{
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pbox_1.Width = panel1.Width;
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pbox_1.Height = pbox_1.Width * bild.Height / bild.Width;
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}
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else
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{
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pbox_1.Height = panel1.Height;
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pbox_1.Width = pbox_1.Height * bild.Width / bild.Height;
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}
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if (save_position)
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{
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pbox_1.Location = position;
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pbox_1.Size = size;
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VerticalScroll.Value = v;
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HorizontalScroll.Value = h;
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}
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else
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{
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update_scrollbar();
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update_picture_position();
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}
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}
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private void ZoomIn()
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{
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if ((pbox_1.Width < (MINMAX * panel1.Width)) &&
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(pbox_1.Height < (MINMAX * panel1.Height)))
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{
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pbox_1.Width = Convert.ToInt32(pbox_1.Width * ZOOMFACTOR);
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pbox_1.Height = Convert.ToInt32(pbox_1.Height * ZOOMFACTOR);
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pbox_1.SizeMode = PictureBoxSizeMode.StretchImage;
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}
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}
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private void ZoomOut()
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{
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if ((pbox_1.Width > (panel1.Width / MINMAX)) &&
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(pbox_1.Height > (panel1.Height / MINMAX)))
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{
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pbox_1.SizeMode = PictureBoxSizeMode.StretchImage;
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pbox_1.Width = Convert.ToInt32(pbox_1.Width / ZOOMFACTOR);
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pbox_1.Height = Convert.ToInt32(pbox_1.Height / ZOOMFACTOR);
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}
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}
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private void pbox_1_MouseEnter(object sender, EventArgs e)
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{
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if (pbox_1.Focused == false)
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{
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pbox_1.Focus();
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update_picture_position();
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}
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}
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private void pbox_1_MouseWheel(object sender, MouseEventArgs e)
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{
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Point old_position = pbox_1.Location;
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Size old_size_picture = pbox_1.Size;
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Size old_size_frame = panel1.Size;
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if (e.Delta > 0)
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{
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ZoomIn();
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}
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else
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{
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ZoomOut();
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}
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Size new_size_picture = pbox_1.Size;
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Size new_size_frame = panel1.Size;
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//pbox_1.Location = new_picture_position(old_position, old_size_picture, old_size_frame, new_size_picture, new_size_frame);
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Point mouse = e.Location;
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pbox_1.Location = new_picture_position(old_position, old_size_picture, mouse, new_size_picture, mouse);
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update_scrollbar();
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update_picture_position();
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}
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Point new_picture_position(Point old_position, Size old_size_picture, Size old_size_frame, Size new_size_picture, Size new_size_frame)
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{
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Point old_position_center = new Point(old_size_frame.Width / 2 - old_position.X, old_size_frame.Height / 2 - old_position.Y);
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Point new_position_center = new Point(old_position_center.X * new_size_picture.Width / old_size_picture.Width, old_position_center.Y * new_size_picture.Height / old_size_picture.Height);
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Point new_pos = new Point(new_size_frame.Width / 2 - new_position_center.X, new_size_frame.Height / 2 - new_position_center.Y);
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return new_pos;
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}
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Point new_picture_position(Point old_position, Size old_size_picture, Point old_position_curser, Size new_size_picture, Point new_position_curser)
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{
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Point old_position_center = new Point(old_position_curser.X - old_position.X, old_position_curser.Y - old_position.Y);
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Point new_position_center = new Point(old_position_center.X * new_size_picture.Width / old_size_picture.Width, old_position_center.Y * new_size_picture.Height / old_size_picture.Height);
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Point new_pos = new Point(new_position_curser.X - new_position_center.X, new_position_curser.Y - new_position_center.Y);
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return new_pos;
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}
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private void pbox_1_SizeChanged(object sender, EventArgs e)
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{
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update_scrollbar();
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update_picture_position();
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}
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private void Form1_SizeChanged(object sender, EventArgs e)
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{
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update_scrollbar();
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update_picture_position();
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}
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void update_scrollbar()
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{
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int max_x = pbox_1.Width - panel1.Width;
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int max_y = pbox_1.Height - panel1.Height;
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if (0 < max_x)
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{
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hScrollBar1.Enabled = true;
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hScrollBar1.Maximum = max_x;
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hScrollBar1.Value = Math.Max(0, Math.Min(max_x, -pbox_1.Location.X));
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}
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else
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{
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hScrollBar1.Enabled = false;
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}
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if (0 < max_y)
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{
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vScrollBar1.Enabled = true;
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vScrollBar1.Maximum = max_y;
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vScrollBar1.Value = Math.Max(0, Math.Min(max_y, -pbox_1.Location.Y));
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}
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else
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{
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vScrollBar1.Enabled = false;
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}
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}
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private void vScrollBar1_Scroll(object sender, ScrollEventArgs e)
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{
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update_picture_position();
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}
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private void hScrollBar1_Scroll(object sender, ScrollEventArgs e)
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{
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update_picture_position();
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}
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void update_picture_position()
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{
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int x = -hScrollBar1.Value;
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int y = -vScrollBar1.Value;
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if (pbox_1.Size.Width < panel1.Width)
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x = (panel1.Width - pbox_1.Width) / 2;
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if (pbox_1.Size.Height < panel1.Height)
|
|||
|
|
y = (panel1.Height - pbox_1.Height) / 2;
|
|||
|
|
pbox_1.Location = new Point(x, y);
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
private void pbox_1_MouseMove(object sender, MouseEventArgs e)
|
|||
|
|
{
|
|||
|
|
mouse_x = bild.Width * e.Location.X / pbox_1.Width;
|
|||
|
|
mouse_y = bild.Height * e.Location.Y / pbox_1.Height;
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
private void pbox_zoom_Load(object sender, EventArgs e)
|
|||
|
|
{
|
|||
|
|
bild = new Bitmap(10, 10);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
}
|