public virtual void HandleMouseDown(Gtk.DrawingArea canvas, Gtk.ButtonPressEventArgs args, Cairo.PointD point)
{
//If we are already drawing, ignore any additional mouse down events.
if (is_drawing)
{
return;
}
//Redraw the previously (and possibly currently) active shape without any control points in case another shape is made active.
DrawActiveShape(false, false, false, false, false);
Document doc = PintaCore.Workspace.ActiveDocument;
shape_origin = new PointD(Utility.Clamp(point.X, 0, doc.ImageSize.Width - 1), Utility.Clamp(point.Y, 0, doc.ImageSize.Height - 1));
current_point = shape_origin;
bool shiftKey = (args.Event.State & Gdk.ModifierType.ShiftMask) == Gdk.ModifierType.ShiftMask;
if (shiftKey)
{
CalculateModifiedCurrentPoint();
}
is_drawing = true;
//Right clicking changes tension.
if (args.Event.Button == 1)
{
changing_tension = false;
}
else
{
changing_tension = true;
}
bool ctrlKey = (args.Event.State & Gdk.ModifierType.ControlMask) == Gdk.ModifierType.ControlMask;
int closestCPIndex, closestCPShapeIndex;
ControlPoint closestControlPoint;
double closestCPDistance;
SEngines.FindClosestControlPoint(current_point,
out closestCPShapeIndex, out closestCPIndex, out closestControlPoint, out closestCPDistance);
int closestShapeIndex, closestPointIndex;
PointD closestPoint;
double closestDistance;
OrganizedPointCollection.FindClosestPoint(SEngines, current_point,
out closestShapeIndex, out closestPointIndex, out closestPoint, out closestDistance);
bool clickedOnControlPoint = false;
double currentClickRange = ShapeClickStartingRange + BrushWidth * ShapeClickThicknessFactor;
//Determine if the closest ControlPoint is within the expected click range.
if (closestControlPoint != null && closestCPDistance < currentClickRange)
{
//User clicked directly on a ControlPoint on a shape.
clicked_without_modifying = true;
SelectedPointIndex = closestCPIndex;
SelectedShapeIndex = closestCPShapeIndex;
clickedOnControlPoint = true;
}
else if (closestDistance < currentClickRange) //Determine if the user clicked close enough to a shape.
{
//User clicked on a generated point on a shape.
List<ControlPoint> controlPoints = SEngines[closestShapeIndex].ControlPoints;
//Note: compare the currentPoint's distance here because it's the actual mouse position.
if (controlPoints.Count > closestPointIndex && current_point.Distance(controlPoints[closestPointIndex].Position) < currentClickRange)
{
//User clicked on a control point (on the "previous order" side of the point).
clicked_without_modifying = true;
SelectedPointIndex = closestPointIndex;
SelectedShapeIndex = closestShapeIndex;
clickedOnControlPoint = true;
}
else if (closestPointIndex > 0)
{
if (current_point.Distance(controlPoints[closestPointIndex - 1].Position) < currentClickRange)
{
//User clicked on a control point (on the "following order" side of the point).
clicked_without_modifying = true;
SelectedPointIndex = closestPointIndex - 1;
SelectedShapeIndex = closestShapeIndex;
clickedOnControlPoint = true;
}
else if (controlPoints.Count > 0 && current_point.Distance(controlPoints[controlPoints.Count - 1].Position) < currentClickRange)
{
//User clicked on a control point (on the "following order" side of the point).
clicked_without_modifying = true;
SelectedPointIndex = closestPointIndex - 1;
SelectedShapeIndex = closestShapeIndex;
clickedOnControlPoint = true;
}
}
//Check for clicking on a non-control point. Don't do anything here if right clicked.
if (!changing_tension && !clickedOnControlPoint && closestShapeIndex > -1 && closestPointIndex > -1 && SEngines.Count > closestShapeIndex)
{
//User clicked on a non-control point on a shape.
//Determine if the currently active tool matches the clicked on shape's corresponding tool, and if not, switch to it.
if (ActivateCorrespondingTool(closestShapeIndex, true) != null)
{
//Pass on the event and its data to the newly activated tool.
PintaCore.Tools.CurrentTool.DoMouseDown(canvas, args, point);
//Don't do anything else here once the tool is switched and the event is passed on.
return;
}
//The currently active tool matches the clicked on shape's corresponding tool.
//Only create a new shape if the user isn't holding the control key down.
if (!ctrlKey)
{
//Create a new ShapesModifyHistoryItem so that the adding of a control point can be undone.
doc.History.PushNewItem(new ShapesModifyHistoryItem(this, owner.Icon, ShapeName + " " + Catalog.GetString("Point Added")));
controlPoints.Insert(closestPointIndex,
new ControlPoint(new PointD(current_point.X, current_point.Y), DefaultMidPointTension));
}
//These should be set after creating the history item.
SelectedPointIndex = closestPointIndex;
SelectedShapeIndex = closestShapeIndex;
ShapeEngine activeEngine = ActiveShapeEngine;
if (activeEngine != null)
{
UpdateToolbarSettings(activeEngine);
}
}
}
//Create a new shape if the user control + clicks on a shape or if the user simply clicks outside of any shapes.
if (!changing_tension && (ctrlKey || (closestCPDistance >= currentClickRange && closestDistance >= currentClickRange)))
{
//Verify that the user clicked inside the image bounds or that the user is
//holding the Ctrl key (to ignore the Image bounds and draw on the edge).
if ((point.X == shape_origin.X && point.Y == shape_origin.Y) || ctrlKey)
{
PointD prevSelPoint;
//First, store the position of the currently selected point.
if (SelectedPoint != null && ctrlKey)
{
prevSelPoint = new PointD(SelectedPoint.Position.X, SelectedPoint.Position.Y);
}
else
{
//This doesn't matter, other than the fact that it gets set to a value in order for the code to build.
prevSelPoint = new PointD(0d, 0d);
}
//Create a new ShapesHistoryItem so that the creation of a new shape can be undone.
doc.History.PushNewItem(new ShapesHistoryItem(this, owner.Icon, ShapeName + " " + Catalog.GetString("Added"),
doc.CurrentUserLayer.Surface.Clone(), doc.CurrentUserLayer, SelectedPointIndex, SelectedShapeIndex, false));
//Create the shape, add its starting points, and add it to SEngines.
SEngines.Add(CreateShape(ctrlKey, clickedOnControlPoint, prevSelPoint));
//Select the new shape.
SelectedShapeIndex = SEngines.Count - 1;
ShapeEngine activeEngine = ActiveShapeEngine;
if (activeEngine != null)
{
//Set the AntiAliasing.
activeEngine.AntiAliasing = owner.UseAntialiasing;
}
StorePreviousSettings();
}
}
else if (clickedOnControlPoint)
{
//Since the user is not creating a new shape or control point but rather modifying an existing control point, it should be determined
//whether the currently active tool matches the clicked on shape's corresponding tool, and if not, switch to it.
if (ActivateCorrespondingTool(SelectedShapeIndex, true) != null)
{
//Pass on the event and its data to the newly activated tool.
PintaCore.Tools.CurrentTool.DoMouseDown(canvas, args, point);
//Don't do anything else here once the tool is switched and the event is passed on.
return;
}
//The currently active tool matches the clicked on shape's corresponding tool.
ShapeEngine activeEngine = ActiveShapeEngine;
if (activeEngine != null)
{
UpdateToolbarSettings(activeEngine);
}
}
//Determine if the user right clicks outside of any shapes (neither on their control points nor on their generated points).
if ((closestCPDistance >= currentClickRange && closestDistance >= currentClickRange) && changing_tension)
{
clicked_without_modifying = true;
}
DrawActiveShape(false, false, true, shiftKey, false);
}
protected unsafe void eraseSmooth(ImageSurface surf, Context g, PointD start, PointD end)
{
int rad = (int)(BrushWidth / 2.0) + 1;
//Premultiply with alpha value
byte bk_col_a = (byte)(PintaCore.Palette.SecondaryColor.A * 255.0);
byte bk_col_r = (byte)(PintaCore.Palette.SecondaryColor.R * bk_col_a);
byte bk_col_g = (byte)(PintaCore.Palette.SecondaryColor.G * bk_col_a);
byte bk_col_b = (byte)(PintaCore.Palette.SecondaryColor.B * bk_col_a);
int num_steps = (int)start.Distance(end) / rad + 1;
//Initialize lookup table when first used (to prevent slower startup of the application)
initLookupTable ();
for (int step = 0; step < num_steps; step++) {
PointD pt = Utility.Lerp(start, end, (float)step / num_steps);
int x = (int)pt.X, y = (int)pt.Y;
Gdk.Rectangle surface_rect = new Gdk.Rectangle (0, 0, surf.Width, surf.Height);
Gdk.Rectangle brush_rect = new Gdk.Rectangle (x - rad, y - rad, 2 * rad, 2 * rad);
Gdk.Rectangle dest_rect = Gdk.Rectangle.Intersect (surface_rect, brush_rect);
if ((dest_rect.Width > 0) && (dest_rect.Height > 0)) {
//Allow Clipping through a temporary surface
using (ImageSurface tmp_surface = copySurfacePart (surf, dest_rect)) {
for (int iy = dest_rect.Top; iy < dest_rect.Bottom; iy++) {
ColorBgra* srcRowPtr = tmp_surface.GetRowAddressUnchecked (iy - dest_rect.Top);
int dy = ((iy - y) * LUT_Resolution) / rad;
if (dy < 0)
dy = -dy;
byte[] lut_factor_row = lut_factor [dy];
for (int ix = dest_rect.Left; ix < dest_rect.Right; ix++) {
ColorBgra col = *srcRowPtr;
int dx = ((ix - x) * LUT_Resolution) / rad;
if (dx < 0)
dx = -dx;
int force = lut_factor_row [dx];
//Note: premultiplied alpha is used!
if (mouse_button == 3) {
col.A = (byte)((col.A * force + bk_col_a * (255 - force)) / 255);
col.R = (byte)((col.R * force + bk_col_r * (255 - force)) / 255);
col.G = (byte)((col.G * force + bk_col_g * (255 - force)) / 255);
col.B = (byte)((col.B * force + bk_col_b * (255 - force)) / 255);
} else {
col.A = (byte)(col.A * force / 255);
col.R = (byte)(col.R * force / 255);
col.G = (byte)(col.G * force / 255);
col.B = (byte)(col.B * force / 255);
}
*srcRowPtr = col;
srcRowPtr++;
}
}
//Draw the final result on the surface
pasteSurfacePart (g, tmp_surface, dest_rect);
}
}
}
}
