private void ClipForm_MouseWheel(object sender, MouseEventArgs e)
{
if (e.Delta > 0)
{
_ZoomRefreshLimiter.Restart();
_ZoomLevel = Math.Round(_ZoomLevel * 1.1d, 2);
_MagnifierShown = true;
zdbZoomedImageDisplay._Show();
DrawZoomedImage(e.Location);
}
else
{
_ZoomLevel = Math.Round(_ZoomLevel * 0.9d, 2);
if (_ZoomLevel <= 1)
{
_ZoomRefreshLimiter.Reset();
_MagnifierShown = false;
_ZoomLevel = 1;
zdbZoomedImageDisplay._Hide();
ScaledImage?.Dispose();
ScaledImage = null;
//GC.Collect();
}
else
{
DrawZoomedImage(e.Location);
}
}
}
private void DrawZoomedImage(Point mousePos)
{
zdbZoomedImageDisplay.Size = new Size(
_ZoomControlSize.Width + (zdbZoomedImageDisplay.BorderThickness << 1),
_ZoomControlSize.Height + (zdbZoomedImageDisplay.BorderThickness << 1));
if (SettingsManager.ClipSettings.Zoom_Follow_Mouse)
{
zdbZoomedImageDisplay.Location = new Point(
mousePos.X - (zdbZoomedImageDisplay.ClientSize.Width >> 1),
mousePos.Y - (zdbZoomedImageDisplay.ClientSize.Height >> 1));
}
// if the clip has been dragged larger then we need
// to resize the image before trying to zoom in on it
if (ClientSize != StartWindowSize)
{
Size scaledImageSize = new Size(
Width - (Options.BorderThickness << 1),
Height - (Options.BorderThickness << 1));
// if the zoomed image is null or not the size its supposed to be
// try and dispose of it, then remake it
if (ScaledImage == null || ScaledImage.Size != scaledImageSize)
{
ScaledImage?.Dispose();
ScaledImage = new Bitmap(scaledImageSize.Width, scaledImageSize.Height);
using (Graphics g = Graphics.FromImage(ScaledImage))
{
g.InterpolationMode = InterpolationMode.NearestNeighbor;
g.PixelOffsetMode = PixelOffsetMode.Half;
g.DrawImage(
Image,
new Rectangle(new Point(Options.BorderThickness, Options.BorderThickness), scaledImageSize),
new Rectangle(0, 0, Image.Width, Image.Height), GraphicsUnit.Pixel);
}
}
zdbZoomedImageDisplay.DrawImage(ScaledImage,
new Rectangle(0, 0, _ZoomControlSize.Width, _ZoomControlSize.Height),
new Rectangle(
mousePos.X - (int)Math.Round(zdbZoomedImageDisplay.Size.Width / _ZoomLevel / 2),
mousePos.Y - (int)Math.Round(zdbZoomedImageDisplay.Size.Height / _ZoomLevel / 2),
(int)Math.Round(_ZoomControlSize.Width / _ZoomLevel),
(int)Math.Round(_ZoomControlSize.Height / _ZoomLevel)));
}
else
{
zdbZoomedImageDisplay.DrawImage(Image,
new Rectangle(0, 0, _ZoomControlSize.Width, _ZoomControlSize.Height),
new Rectangle(
mousePos.X - (int)Math.Round(zdbZoomedImageDisplay.Size.Width / _ZoomLevel / 2),
mousePos.Y - (int)Math.Round(zdbZoomedImageDisplay.Size.Height / _ZoomLevel / 2),
(int)Math.Round(_ZoomControlSize.Width / _ZoomLevel),
(int)Math.Round(_ZoomControlSize.Height / _ZoomLevel)));
}
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
_ChangeTracker?.Dispose();
cmMain?.Dispose();
ScaledImage?.Dispose();
zdbZoomedImageDisplay?.Dispose();
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}