protected override void OnMouseDown(Document document, ToolMouseEventArgs e)
{
var pos = e.Point;
// Don't do anything if we're outside the canvas
if (pos.X < 0 || pos.X >= document.ImageSize.Width)
{
return;
}
if (pos.Y < 0 || pos.Y >= document.ImageSize.Height)
{
return;
}
base.OnMouseDown(document, e);
using (var currentRegion = new Cairo.Region(document.GetSelectedBounds(true).ToCairoRectangleInt())) {
// See if the mouse click is valid
if (!currentRegion.ContainsPoint(pos.X, pos.Y) && LimitToSelection)
{
return;
}
var surface = document.Layers.CurrentUserLayer.Surface;
var stencilBuffer = new BitMask(surface.Width, surface.Height);
var tol = (int)(Tolerance * Tolerance * 256);
Rectangle boundingBox;
if (IsContinguousMode)
{
CairoExtensions.FillStencilFromPoint(surface, stencilBuffer, pos, tol, out boundingBox, currentRegion, LimitToSelection);
}
else
{
CairoExtensions.FillStencilByColor(surface, stencilBuffer, surface.GetColorBgraUnchecked(pos.X, pos.Y), tol, out boundingBox, currentRegion, LimitToSelection);
}
OnFillRegionComputed(document, stencilBuffer);
// If a derived tool is only going to use the stencil,
// don't waste time building the polygon set
if (CalculatePolygonSet)
{
var polygonSet = stencilBuffer.CreatePolygonSet(boundingBox, 0, 0);
OnFillRegionComputed(document, polygonSet);
}
}
}
protected void GenerateMask()
{
if (MaskMap != null)
{
MaskMap.Dispose();
}
using (var maskImage = new ImageSurface(Format.Argb32, Image.Width, Image.Height))
{
using (var cr = new Context(maskImage))
{
cr.SetSourceRGB(0, 0, 0);
cr.Operator = Operator.Clear;
cr.Paint();
cr.Operator = Operator.Source;
cr.SetSource(Image, 0, 0);
cr.Rectangle(new Cairo.Rectangle(0, 0, Image.Width, Image.Height));
cr.Paint();
}
MaskMap = Gdk.CairoHelper.RegionCreateFromSurface(maskImage);
}
}
public Status Xor (Region other)
{
CheckDisposed ();
return NativeMethods.cairo_region_xor (Handle, other.Handle);
}
public Status Intersect (Region other)
{
CheckDisposed ();
return NativeMethods.cairo_region_intersect (Handle, other.Handle);
}
public Status Subtract (Region other)
{
CheckDisposed ();
return NativeMethods.cairo_region_subtract (Handle, other.Handle);
}
public override void OnButtonRelease(MouseButtonEvent evt)
{
base.OnButtonRelease(evt);
if (IsSelected && !IsTogglable)
{
Deselect();
}
// if we were just clicked, we get to handle the next button release event
if (hitRegion != Region.None)
{
hitRegion = Region.None;
evt.Handle(this);
MakeDirty();
}
}
public override void OnButtonPress(MouseButtonEvent evt)
{
base.OnButtonPress(evt);
if (evt.IsHandled)
return;
hitRegion = HitRegion(evt.Pos);
if (hitRegion != Region.None)
{
if (IsTogglable)
{
if (IsSelected)
Deselect();
}
Select(hitRegion);
evt.Handle(this);
if (hitRegion == Region.Button1)
RaiseAction1();
else
RaiseAction2();
MakeDirty();
}
}
public override bool HitTest(Coord pos)
{
hitRegion = HitRegion(pos);
Hover(hitRegion);
return hitRegion != Region.None;
}
/// <summary>
/// Sets the hovering state on a region (and unsets it on the other one).
/// </summary>
protected void Hover(Region region)
{
if (region == Region.Button1)
{
if ((HitState1 &= HitState.Hovering) == 0) // wasn't hovering before
MakeDirty();
HitState1 |= HitState.Hovering;
HitState2 &= ~HitState.Hovering;
}
else if (region == Region.Button2)
{
if ((HitState2 &= HitState.Hovering) == 0) // wasn't hovering before
MakeDirty();
HitState2 |= HitState.Hovering;
HitState1 &= ~HitState.Hovering;
}
else // nothing is hovering
{
HitState1 &= ~HitState.Hovering;
HitState2 &= ~HitState.Hovering;
}
}
/// <summary>
/// Selects the given region (and deselects the other one).
/// </summary>
public void Select(Region region)
{
Select();
if (region == Region.Button1)
{
HitState1 |= HitState.Selected;
HitState2 &= ~HitState.Selected;
}
else if (region == Region.Button2)
{
HitState2 |= HitState.Selected;
HitState1 &= ~HitState.Selected;
}
else // nothing is selected
{
HitState1 &= ~HitState.Selected;
HitState2 &= ~HitState.Selected;
}
}
public Status Xor (Region other)
{
return NativeMethods.cairo_region_xor (Handle, other.Handle);
}
public Status Union (Region other)
{
return NativeMethods.cairo_region_union (Handle, other.Handle);
}
public Status Intersect (Region other)
{
return NativeMethods.cairo_region_intersect (Handle, other.Handle);
}
public Status Subtract (Region other)
{
return NativeMethods.cairo_region_subtract (Handle, other.Handle);
}