private void ZoomControl_PreviewMouseMove(object sender, MouseEventArgs e)
{
switch (ModifierMode)
{
case ZoomViewModifierMode.None:
return;
case ZoomViewModifierMode.Pan:
var translate = _startTranslate + (e.GetPosition(this) - _mouseDownPos);
TranslateX = translate.X;
TranslateY = translate.Y;
Mode = ZoomControlModes.Custom;
break;
case ZoomViewModifierMode.ZoomIn:
break;
case ZoomViewModifierMode.ZoomOut:
break;
case ZoomViewModifierMode.ZoomBox:
var pos = e.GetPosition(this);
var x = Math.Min(_mouseDownPos.X, pos.X);
var y = Math.Min(_mouseDownPos.Y, pos.Y);
var sizeX = Math.Abs(_mouseDownPos.X - pos.X);
var sizeY = Math.Abs(_mouseDownPos.Y - pos.Y);
ZoomBox = new Rect(x, y, sizeX, sizeY);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
private void DoZoom(double deltaZoom, int mod, Point origoPosition, Point startHandlePosition, Point targetHandlePosition, bool setDelta = false)
{
var startZoom = Zoom;
var currentZoom = setDelta ? deltaZoom : (mod == -1 ? (startZoom / deltaZoom) : (startZoom * deltaZoom));
currentZoom = Math.Max(MinZoom, Math.Min(MaxZoom, currentZoom));
var startTranslate = new Point(TranslateX, TranslateY);
var v = startHandlePosition.Subtract(origoPosition);
var vTarget = targetHandlePosition.Subtract(origoPosition);
var targetPoint = v.Subtract(startTranslate).Div(startZoom);
var zoomedTargetPointPos = targetPoint.Mul(currentZoom).Sum(startTranslate);
var endTranslate = vTarget.Subtract(zoomedTargetPointPos);
if (setDelta)
{
var transformX = GetCoercedTranslate(endTranslate.X);
var transformY = GetCoercedTranslate(endTranslate.Y);
DoZoomAnimation(currentZoom, transformX, transformY);
}
else
{
var transformX = GetCoercedTranslate(TranslateX + endTranslate.X);
var transformY = GetCoercedTranslate(TranslateY + endTranslate.Y);
DoZoomAnimation(currentZoom, transformX, transformY);
}
Mode = ZoomControlModes.Custom;
}
/// <summary>
/// Zoom to fill screen area with the content
/// </summary>
public void ZoomToFill()
{
if (Mode == ZoomControlModes.Fill)
{
DoZoomToFill();
}
else
{
Mode = ZoomControlModes.Fill;
}
}
/// <summary>
/// Zoom to original size
/// </summary>
public void ZoomToOriginal()
{
if (Mode == ZoomControlModes.Original)
{
DoZoomToOriginal();
}
else
{
Mode = ZoomControlModes.Original;
}
}
private static void Mode_PropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ZoomControl zc = (ZoomControl)d;
ZoomControlModes mode = (ZoomControlModes)e.NewValue;
if (mode == ZoomControlModes.Fill)
{
zc.TranslateX = 0;
zc.TranslateY = 0;
zc.Zoom = 1;
}
}
private void OnMouseDown(MouseButtonEventArgs e, bool isPreview)
{
if ((Keyboard.Modifiers & ModifierKeys.Control) > 0 && e.MiddleButton == MouseButtonState.Pressed)
{
Mode = ZoomControlModes.Fill;
e.Handled = true;
return;
}
if (ModifierMode != ZoomViewModifierMode.None)
{
return;
}
switch (Keyboard.Modifiers)
{
case ModifierKeys.None:
if (!isPreview)
{
ModifierMode = ZoomViewModifierMode.Pan;
}
break;
case ModifierKeys.Alt:
ModifierMode = ZoomViewModifierMode.ZoomBox;
break;
case ModifierKeys.Control:
break;
case ModifierKeys.Shift:
ModifierMode = ZoomViewModifierMode.Pan;
break;
case ModifierKeys.Windows:
break;
default:
return;
}
if (ModifierMode == ZoomViewModifierMode.None)
{
return;
}
_mouseDownPos = e.GetPosition(this);
_startTranslate = new Vector(TranslateX, TranslateY);
Mouse.Capture(this);
PreviewMouseMove += ZoomControl_PreviewMouseMove;
}
private void DoZoom(double deltaZoom, Point origoPosition, Point startHandlePosition, Point targetHandlePosition)
{
var startZoom = Zoom;
var currentZoom = startZoom * deltaZoom;
currentZoom = Math.Max(MinZoom, Math.Min(MaxZoom, currentZoom));
var startTranslate = new Vector(TranslateX, TranslateY);
var v = startHandlePosition - origoPosition;
var vTarget = targetHandlePosition - origoPosition;
var targetPoint = (v - startTranslate) / startZoom;
var zoomedTargetPointPos = targetPoint * currentZoom + startTranslate;
var endTranslate = vTarget - zoomedTargetPointPos;
var transformX = GetCoercedTranslateX(TranslateX + endTranslate.X, currentZoom);
var transformY = GetCoercedTranslateY(TranslateY + endTranslate.Y, currentZoom);
DoZoomAnimation(currentZoom, transformX, transformY);
Mode = ZoomControlModes.Custom;
}
private void DoZoom(double deltaZoom, Point origoPosition, Point startHandlePosition, Point targetHandlePosition)
{
double startZoom = Zoom;
double currentZoom = startZoom * deltaZoom;
currentZoom = Math.Max(MinZoom, Math.Min(MaxZoom, currentZoom));
var startTranslate = new Vector(TranslateX, TranslateY);
var v = (startHandlePosition - origoPosition);
var vTarget = (targetHandlePosition - origoPosition);
var targetPoint = (v - startTranslate) / startZoom;
var zoomedTargetPointPos = targetPoint * currentZoom + startTranslate;
var endTranslate = vTarget - zoomedTargetPointPos;
double transformX = _presenter == null ? 0.0 : TranslateX + endTranslate.X;
double transformY = _presenter == null ? 0.0 : TranslateY + endTranslate.Y;
DoZoomAnimation(currentZoom, transformX, transformY);
Mode = ZoomControlModes.Custom;
}
private void DoZoom(double deltaZoom, Point origoPosition, Point startHandlePosition, Point targetHandlePosition)
{
double startZoom = Zoom;
double currentZoom = startZoom * deltaZoom;
currentZoom = Math.Max(MinZoom, Math.Min(MaxZoom, currentZoom));
Vector startTranslate = new Vector(TranslateX, TranslateY);
Vector v = (startHandlePosition - origoPosition);
Vector vTarget = (targetHandlePosition - origoPosition);
Vector targetPoint = (v - startTranslate) / startZoom;
Vector zoomedTargetPointPos = targetPoint * currentZoom + startTranslate;
Vector endTranslate = vTarget - zoomedTargetPointPos;
double transformX = TranslateX + endTranslate.X;
double transformY = TranslateY + endTranslate.Y;
TranslateX = transformX;
TranslateY = transformY;
Zoom = currentZoom;
Mode = ZoomControlModes.Custom;
}
public void ZoomToFill()
{
Mode = ZoomControlModes.Fill;
}
public void ZoomToOriginal()
{
Mode = ZoomControlModes.Original;
}
private void DoZoom(double deltaZoom, Point origoPosition, Point startHandlePosition, Point targetHandlePosition)
{
double startZoom = Zoom;
double currentZoom = startZoom * deltaZoom;
currentZoom = Math.Max(MinZoom, Math.Min(MaxZoom, currentZoom));
var startTranslate = new Vector(TranslateX, TranslateY);
var v = (startHandlePosition - origoPosition);
var vTarget = (targetHandlePosition - origoPosition);
var targetPoint = (v - startTranslate) / startZoom;
var zoomedTargetPointPos = targetPoint * currentZoom + startTranslate;
var endTranslate = vTarget - zoomedTargetPointPos;
double transformX = GetCoercedTranslateX(TranslateX + endTranslate.X, currentZoom);
double transformY = GetCoercedTranslateY(TranslateY + endTranslate.Y, currentZoom);
DoZoomAnimation(currentZoom, transformX, transformY);
Mode = ZoomControlModes.Custom;
}
public void ZoomToOriginal()
{
Mode = ZoomControlModes.Original;
}
/// <summary>
/// Zoom to fill screen area with the content
/// </summary>
public void ZoomToFill()
{
if(Mode == ZoomControlModes.Fill)
DoZoomToFill();
else Mode = ZoomControlModes.Fill;
}
private void DoZoom(double deltaZoom, int mod, Point origoPosition, Point startHandlePosition, Point targetHandlePosition, bool setDelta = false)
{
var startZoom = Zoom;
var currentZoom = setDelta ? deltaZoom : (mod == -1 ? (startZoom / deltaZoom) : (startZoom * deltaZoom));
currentZoom = Math.Max(MinZoom, Math.Min(MaxZoom, currentZoom));
var startTranslate = new Vector(TranslateX, TranslateY);
var v = (startHandlePosition - origoPosition);
var vTarget = (targetHandlePosition - origoPosition);
var targetPoint = (v - startTranslate) / startZoom;
var zoomedTargetPointPos = targetPoint * currentZoom + startTranslate;
var endTranslate = vTarget - zoomedTargetPointPos;
if (setDelta)
{
var transformX = GetCoercedTranslateX(endTranslate.X, currentZoom);
var transformY = GetCoercedTranslateY(endTranslate.Y, currentZoom);
DoZoomAnimation(currentZoom, transformX, transformY);
}
else
{
var transformX = GetCoercedTranslateX(TranslateX + endTranslate.X, currentZoom);
var transformY = GetCoercedTranslateY(TranslateY + endTranslate.Y, currentZoom);
DoZoomAnimation(currentZoom, transformX, transformY);
}
Mode = ZoomControlModes.Custom;
}
/// <summary>
/// Zoom to original size
/// </summary>
public void ZoomToOriginal()
{
if (Mode == ZoomControlModes.Original)
DoZoomToOriginal();
else Mode = ZoomControlModes.Original;
}
private void ResetExecuted(object sender, ExecutedRoutedEventArgs e)
{
Mode = ZoomControlModes.Fill;
}
public void ZoomToFill()
{
Mode = ZoomControlModes.Fill;
}
private void DoZoom(double deltaZoom, int mod, Point origoPosition, Point startHandlePosition, Point targetHandlePosition, bool setDelta = false)
{
var startZoom = Zoom;
var currentZoom = setDelta ? deltaZoom : (mod == -1 ? (startZoom / deltaZoom) : (startZoom * deltaZoom));
currentZoom = Math.Max(MinZoom, Math.Min(MaxZoom, currentZoom));
var startTranslate = new Point(TranslateX, TranslateY);
var v = startHandlePosition.Subtract(origoPosition);
var vTarget = targetHandlePosition.Subtract(origoPosition);
var targetPoint = v.Subtract(startTranslate).Div(startZoom);
var zoomedTargetPointPos = targetPoint.Mul(currentZoom).Sum(startTranslate);
var endTranslate = vTarget.Subtract(zoomedTargetPointPos);
if (setDelta)
{
var transformX = GetCoercedTranslate(endTranslate.X);
var transformY = GetCoercedTranslate(endTranslate.Y);
DoZoomAnimation(currentZoom, transformX, transformY);
}
else
{
var transformX = GetCoercedTranslate(TranslateX + endTranslate.X);
var transformY = GetCoercedTranslate(TranslateY + endTranslate.Y);
DoZoomAnimation(currentZoom, transformX, transformY);
}
Mode = ZoomControlModes.Custom;
}