86 lines
2.5 KiB
C#
86 lines
2.5 KiB
C#
namespace SnippingTool;
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public partial class SnippingTool : Form
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{
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public static Image? Snip()
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{
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var rc = Screen.PrimaryScreen.Bounds;
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using Bitmap bmp = new Bitmap(rc.Width, rc.Height, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);
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using Graphics gr = Graphics.FromImage(bmp);
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gr.CopyFromScreen(0, 0, 0, 0, bmp.Size);
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using var snipper = new SnippingTool(bmp);
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return snipper.ShowDialog() == DialogResult.OK ? snipper.Image : null;
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}
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public SnippingTool(Image screenShot)
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{
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InitializeComponent();
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BackgroundImage = screenShot;
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ShowInTaskbar = false;
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FormBorderStyle = FormBorderStyle.None;
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WindowState = FormWindowState.Maximized;
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DoubleBuffered = true;
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}
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public Image? Image { get; set; }
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private Rectangle rcSelect = new Rectangle();
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private Point pntStart;
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protected override void OnMouseDown(MouseEventArgs e)
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{
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if (e.Button != MouseButtons.Left)
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{
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return;
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}
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pntStart = e.Location;
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rcSelect = new Rectangle(e.Location, new Size(0, 0));
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Invalidate();
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}
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protected override void OnMouseMove(MouseEventArgs e)
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{
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if (e.Button != MouseButtons.Left)
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{
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return;
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}
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int x1 = Math.Min(e.X, pntStart.X);
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int y1 = Math.Min(e.Y, pntStart.Y);
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int x2 = Math.Max(e.X, pntStart.X);
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int y2 = Math.Max(e.Y, pntStart.Y);
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rcSelect = new Rectangle(x1, y1, x2 - x1, y2 - y1);
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Invalidate();
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}
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protected override void OnMouseUp(MouseEventArgs e)
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{
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if (rcSelect.Width <= 0 || rcSelect.Height <= 0)
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{
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return;
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}
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Image = new Bitmap(rcSelect.Width, rcSelect.Height);
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using Graphics gr = Graphics.FromImage(Image);
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gr.DrawImage(BackgroundImage, new Rectangle(0, 0, Image.Width, Image.Height),
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rcSelect, GraphicsUnit.Pixel);
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DialogResult = DialogResult.OK;
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}
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protected override void OnPaint(PaintEventArgs e)
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{
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using Brush br = new SolidBrush(Color.FromArgb(120, Color.White));
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int x1 = rcSelect.X; int x2 = rcSelect.X + rcSelect.Width;
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int y1 = rcSelect.Y; int y2 = rcSelect.Y + rcSelect.Height;
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e.Graphics.FillRectangle(br, new Rectangle(0, 0, x1, Height));
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e.Graphics.FillRectangle(br, new Rectangle(x2, 0, Width - x2, Height));
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e.Graphics.FillRectangle(br, new Rectangle(x1, 0, x2 - x1, y1));
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e.Graphics.FillRectangle(br, new Rectangle(x1, y2, x2 - x1, Height - y2));
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using Pen pen = new Pen(Color.Red, 3);
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e.Graphics.DrawRectangle(pen, rcSelect);
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}
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protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
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{
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if (keyData == Keys.Escape)
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{
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DialogResult = DialogResult.Cancel;
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}
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return base.ProcessCmdKey(ref msg, keyData);
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}
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} |