canvas-view-example.cpp
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/*
* Copyright (c) 2021 Samsung Electronics Co., Ltd.
*
* 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.
*
*/
#include <dali-toolkit/dali-toolkit.h>
#include <dali-toolkit/devel-api/controls/canvas-view/canvas-view.h>
#include <dali/devel-api/adaptor-framework/canvas-renderer-drawable-group.h>
#include <dali/devel-api/adaptor-framework/canvas-renderer-shape.h>
using namespace Dali;
/**
* @brief This demonstrates how to display and control vector primitives using CanvasView.
*
* - It displays various types of shapes. Rectangle, circle, path, etc.
* - Each shape can be set to fill color, stroke color, width, etc
* and can change the transfomation(rotate, scale, translate)
*/
class CanvasViewController : public ConnectionTracker
{
public:
/**
* @brief Constructor.
* @param[in] application A reference to the Application class
*/
CanvasViewController(Application& application)
: mApplication(application),
mRoundedRect(),
mArc(),
mStar(),
mTimer(),
mCount(0)
{
// Connect to the Application's Init signal
mApplication.InitSignal().Connect(this, &CanvasViewController::Create);
}
~CanvasViewController() = default;
void Create(Application& application)
{
// The Init signal is received once (only) during the Application lifetime
Window window = application.GetWindow();
Vector2 windowSize = window.GetSize();
window.KeyEventSignal().Connect(this, &CanvasViewController::OnKeyEvent);
Toolkit::CanvasView mCanvasView = Toolkit::CanvasView::New(windowSize);
mCanvasView.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
mCanvasView.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER);
mCanvasView.SetProperty(Actor::Property::SIZE, windowSize);
Dali::CanvasRenderer::Shape canvasBackground = Dali::CanvasRenderer::Shape::New();
canvasBackground.AddRect(Rect<float>(0.0f, 0.0f, windowSize.width, windowSize.height), Vector2::ZERO);
canvasBackground.SetFillColor(Vector4(1.0f, 1.0f, 1.0f, 1.0f));
mCanvasView.AddDrawable(canvasBackground);
Dali::CanvasRenderer::Shape shape1 = Dali::CanvasRenderer::Shape::New();
shape1.AddRect(Rect<float>(-50.0f, -50.0f, 100.0f, 100.0f), Vector2::ZERO);
shape1.SetFillColor(Vector4(0.0f, 0.5f, 0.0f, 0.5f));
shape1.SetStrokeColor(Vector4(0.5f, 0.0f, 0.0f, 0.5f));
shape1.SetStrokeWidth(10.0f);
shape1.Scale(1.2f);
shape1.Rotate(Degree(45.0f));
shape1.Translate(Vector2(100.0f, 100.0f));
mRoundedRect = Dali::CanvasRenderer::Shape::New();
mRoundedRect.AddRect(Rect<float>(10.0f, 350.0f, 200.0f, 140.0f), Vector2(40.0f, 40.0f));
mRoundedRect.SetFillColor(Vector4(0.0f, 0.0f, 1.0f, 1.0f));
mRoundedRect.SetOpacity(0.5f);
mRoundedRect.SetStrokeColor(Vector4(1.0f, 1.0f, 0.0f, 1.0f));
mRoundedRect.SetStrokeWidth(10.0f);
mRoundedRect.SetStrokeJoin(Dali::CanvasRenderer::Shape::StrokeJoin::MITER);
Dali::Vector<float> dashPattern;
dashPattern.PushBack(15.0f);
dashPattern.PushBack(30.0f);
mRoundedRect.SetStrokeDash(dashPattern);
Dali::CanvasRenderer::Shape shape2 = Dali::CanvasRenderer::Shape::New();
shape2.AddMoveTo(Vector2(535.0f, 135.0f));
shape2.AddLineTo(Vector2(660.0f, 455.0f));
shape2.AddLineTo(Vector2(355.0f, 250.0f));
shape2.AddLineTo(Vector2(715.0f, 250.0f));
shape2.AddLineTo(Vector2(410.0f, 455.0f));
shape2.Close();
shape2.SetFillRule(Dali::CanvasRenderer::Shape::FillRule::EVEN_ODD);
shape2.SetFillColor(Vector4(1.0f, 0.0f, 0.0f, 1.0f));
shape2.SetOpacity(0.5f);
shape2.SetStrokeColor(Vector4(1.0f, 0.0f, 1.0f, 1.0f));
shape2.SetStrokeWidth(20.0f);
shape2.SetStrokeJoin(Dali::CanvasRenderer::Shape::StrokeJoin::ROUND);
shape2.Transform(Matrix3(0.6f, 0.0f, 20.0f, 0.0f, 0.6f, -50.0f, 0.0f, 0.0f, 1.0f));
mArc = Dali::CanvasRenderer::Shape::New();
mArc.AddArc(Vector2(100.0f, 650.0f), 80.0f, 10.0f, 0.0f, true);
mArc.AddArc(Vector2(100.0f, 650.0f), 80.0f, 10.0f, 0.0f, true);
mArc.SetOpacity(0.5f);
mArc.SetStrokeColor(Vector4(0.0f, 1.0f, 0.0f, 1.0f));
mArc.SetStrokeWidth(10.0f);
mArc.SetStrokeCap(Dali::CanvasRenderer::Shape::StrokeCap::ROUND);
mCanvasView.AddDrawable(mArc);
mStar = Dali::CanvasRenderer::Shape::New();
mStar.AddMoveTo(Vector2(-1.0f, -165.0f));
mStar.AddLineTo(Vector2(53.0f, -56.0f));
mStar.AddLineTo(Vector2(174.0f, -39.0f));
mStar.AddLineTo(Vector2(87.0f, 45.0f));
mStar.AddLineTo(Vector2(107.0f, 166.0f));
mStar.AddLineTo(Vector2(-1.0f, 110.0f));
mStar.AddLineTo(Vector2(-103.0f, 166.0f));
mStar.AddLineTo(Vector2(-88.0f, 46.0f));
mStar.AddLineTo(Vector2(-174.0f, -38.0f));
mStar.AddLineTo(Vector2(-54.0f, -56.0f));
mStar.Close();
mStar.SetFillColor(Vector4(0.0f, 1.0f, 1.0f, 1.0f));
mStar.SetStrokeColor(Vector4(0.5f, 1.0f, 0.5f, 1.0f));
mStar.SetStrokeWidth(30.0f);
mStar.SetStrokeCap(Dali::CanvasRenderer::Shape::StrokeCap::ROUND);
mStar.Scale(0.6f);
mStar.Translate(Vector2(350.0f, 450.0f));
mStar.SetOpacity(0.5f);
mCanvasView.AddDrawable(mStar);
mGroup1 = Dali::CanvasRenderer::DrawableGroup::New();
mGroup1.AddDrawable(mRoundedRect);
mGroup1.AddDrawable(shape1);
mGroup2 = Dali::CanvasRenderer::DrawableGroup::New();
mGroup2.AddDrawable(mGroup1);
mGroup2.AddDrawable(shape2);
mCanvasView.AddDrawable(mGroup2);
mTimer = Timer::New(1000.0f / 32.0f);
mTimer.TickSignal().Connect(this, &CanvasViewController::tick);
mTimer.Start();
window.Add(mCanvasView);
}
/**
* @brief Called when set time.
*
* Change transformation every call to make it look like vector animation.
*/
bool tick()
{
mRoundedRect.ResetPath();
mRoundedRect.AddRect(Rect<float>(10.0f, 350.0f, 200.0f, 140.0f), Vector2(float(mCount % 80), float(mCount % 80)));
mArc.ResetPath();
mArc.AddArc(Vector2(100.0f, 650.0f), 80.0f, 10.0f, float(mCount % 180), true);
mArc.AddArc(Vector2(100.0f, 650.0f), 80.0f, 10.0f + float(mCount % 180), float(mCount % 180) / 2.0f, true);
mStar.Rotate(Degree(mCount * 2.0f));
mStar.Scale(float(mCount % 100) * 0.01f + 0.6f);
mGroup1.Scale(float(mCount % 50) * 0.005f + 0.8f);
mGroup2.SetOpacity(1.0f - float(mCount % 50) * 0.015f);
mCount++;
return true;
}
/**
* @brief Called when any key event is received.
*
* Will use this to quit the application if Back or the Escape key is received
* @param[in] event The key event information
*/
void OnKeyEvent(const KeyEvent& event)
{
if(event.GetState() == KeyEvent::DOWN)
{
if(IsKey(event, Dali::DALI_KEY_ESCAPE) || IsKey(event, Dali::DALI_KEY_BACK))
{
mApplication.Quit();
}
}
}
private:
Application& mApplication;
Dali::CanvasRenderer::Shape mRoundedRect;
Dali::CanvasRenderer::Shape mArc;
Dali::CanvasRenderer::Shape mStar;
Dali::CanvasRenderer::DrawableGroup mGroup1;
Dali::CanvasRenderer::DrawableGroup mGroup2;
Timer mTimer;
int mCount;
};
int DALI_EXPORT_API main(int argc, char** argv)
{
Application application = Application::New(&argc, &argv);
CanvasViewController test(application);
application.MainLoop();
return 0;
}