clip.dart
3.18 KB
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/*
* Copyright (C) 2017, David PHAM-VAN <dev.nfet.net@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
part of widget;
class ClipRect extends SingleChildWidget {
ClipRect({Widget child}) : super(child: child);
@protected
void debugPaint(Context context) {
context.canvas
..setStrokeColor(PdfColor.deepPurple)
..drawRect(box.x, box.y, box.width, box.height)
..strokePath();
}
@override
void paint(Context context) {
assert(() {
if (Document.debug) debugPaint(context);
return true;
}());
if (child != null) {
final mat = Matrix4.identity();
mat.translate(box.x, box.y);
context.canvas
..saveContext()
..drawRect(box.x, box.y, box.width, box.height)
..clipPath()
..setTransform(mat);
child.paint(context);
context.canvas.restoreContext();
}
}
}
class ClipRRect extends SingleChildWidget {
ClipRRect({
Widget child,
this.horizontalRadius,
this.verticalRadius,
}) : super(child: child);
final double horizontalRadius;
final double verticalRadius;
@protected
void debugPaint(Context context) {
context.canvas
..setStrokeColor(PdfColor.deepPurple)
..drawRRect(
box.x, box.y, box.width, box.height, horizontalRadius, verticalRadius)
..strokePath();
}
@override
void paint(Context context) {
assert(() {
if (Document.debug) debugPaint(context);
return true;
}());
if (child != null) {
final mat = Matrix4.identity();
mat.translate(box.x, box.y);
context.canvas
..saveContext()
..drawRRect(box.x, box.y, box.width, box.height, horizontalRadius,
verticalRadius)
..clipPath()
..setTransform(mat);
child.paint(context);
context.canvas.restoreContext();
}
}
}
class ClipOval extends SingleChildWidget {
ClipOval({Widget child}) : super(child: child);
@protected
void debugPaint(Context context) {
final rx = box.width / 2.0;
final ry = box.height / 2.0;
context.canvas
..setStrokeColor(PdfColor.deepPurple)
..drawEllipse(box.x + rx, box.y + ry, rx, ry)
..strokePath();
}
@override
void paint(Context context) {
assert(() {
if (Document.debug) debugPaint(context);
return true;
}());
final rx = box.width / 2.0;
final ry = box.height / 2.0;
if (child != null) {
final mat = Matrix4.identity();
mat.translate(box.x, box.y);
context.canvas
..saveContext()
..drawEllipse(box.x + rx, box.y + ry, rx, ry)
..clipPath()
..setTransform(mat);
child.paint(context);
context.canvas.restoreContext();
}
}
}