2 * Copyright (c) 2020 Samsung Electronics Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
21 #include "shared/view.h"
23 #include <dali-toolkit/dali-toolkit.h>
24 #include <dali-toolkit/devel-api/controls/magnifier/magnifier.h>
29 const char* BACKGROUND_IMAGE(DEMO_IMAGE_DIR "background-magnifier.jpg");
30 const char* TOOLBAR_IMAGE(DEMO_IMAGE_DIR "top-bar.png");
31 const char* APPLICATION_TITLE("Magnifier Example");
32 const Vector3 MAGNIFIER_SIZE(0.25f, 0.25f, 0.0f); ///< Magnifier sides should be 25% of the width of the window
33 const float ANIMATION_DURATION(60.0f); ///< Run animation for a minute before repeating.
34 const float MAGNIFIER_DISPLAY_DURATION(0.125f); ///< Duration in seconds for show/hide manual magnifier animation
36 const float MAGNIFICATION_FACTOR(2.0f); ///< Amount to magnify by.
37 const float MAGNIFIER_INDENT(10.0f); ///< Indentation around edge of window to define where magnifiers may move.
38 const float FINGER_RADIUS_INCHES(0.25f); ///< Average finger radius in inches from the center of index finger to edge.
41 * MagnifierPathConstraint
42 * This constraint governs the position of the
43 * animating magnifier in a swirly pattern around
46 struct MagnifierPathConstraint
49 * Constraint constructor
50 * @param[in] windowSize The window size so that the constraint can create a path
51 * within window bounds.
53 MagnifierPathConstraint(const Vector3& windowSize,
54 Vector3 offset = Vector3::ZERO)
55 : mWindowSize(windowSize),
60 void operator()(Vector3& current, const PropertyInputContainer& inputs)
62 float time = inputs[1]->GetFloat();
63 const Vector3& size = inputs[0]->GetVector3();
67 Vector3 range(mWindowSize - size - Vector3::ONE * MAGNIFIER_INDENT * 2.0f);
68 current.x += 0.5f * sinf(time * 0.471f) * range.width;
69 current.y += 0.5f * sinf(time * 0.8739f) * range.height;
72 Vector3 mWindowSize; ///< Keep track of the window size for determining path within window bounds
73 Vector3 mOffset; ///< Amount to offset magnifier path
77 * Confine Actor to boundaries of reference actor (e.g. Parent)
78 * Actor bounds (top-left position + size) are confined to reference Actor's
81 struct ConfinementConstraint
84 * Confinement constraint constructor.
85 * @param[in] offsetOrigin (optional) Whether to offset the parent origin or not.
86 * @param[in] topLeftMargin (optional) Top-Left margins (defaults to 0.0f, 0.0f)
87 * @param[in] bottomRightMargin (optional) Bottom-Right margins (defaults to 0.0f, 0.0f)
88 * @param[in] flipHorizontal (optional) whether to flip Actor to the other side X if near edge, and by
89 * how much (defaults to 0.0f i.e. no flip)
90 * @param[in] flipVertical (optional) whether to flip Actor to the other side Y if near edge, and by
91 * how much (defaults to 0.0f i.e. no flip)
93 ConfinementConstraint(Vector3 offsetOrigin = Vector3::ZERO, Vector2 topLeftMargin = Vector2::ZERO, Vector2 bottomRightMargin = Vector2::ZERO, bool flipHorizontal = false, bool flipVertical = false)
94 : mOffsetOrigin(offsetOrigin),
95 mMinIndent(topLeftMargin),
96 mMaxIndent(bottomRightMargin),
97 mFlipHorizontal(flipHorizontal),
98 mFlipVertical(flipVertical)
102 void operator()(Vector3& current, const PropertyInputContainer& inputs)
104 const Vector3& size = inputs[0]->GetVector3();
105 const Vector3 origin = inputs[1]->GetVector3();
106 const Vector3& anchor = inputs[2]->GetVector3();
107 const Vector3& referenceSize = inputs[3]->GetVector3();
109 Vector3 offset(mOffsetOrigin * referenceSize);
111 // Get actual position of Actor relative to parent's Top-Left.
112 Vector3 position(current + offset + origin * referenceSize);
116 // if top-left corner is outside of Top-Left bounds, then push back in screen.
117 Vector3 corner(position - size * anchor - mMinIndent);
119 if(mFlipHorizontal && corner.x < 0.0f)
122 current.x += size.width;
125 if(mFlipVertical && corner.y < 0.0f)
128 current.y += size.height;
131 current.x -= std::min(corner.x, 0.0f);
132 current.y -= std::min(corner.y, 0.0f);
134 // if bottom-right corner is outside of Bottom-Right bounds, then push back in screen.
135 corner += size - referenceSize + mMinIndent + mMaxIndent;
137 if(mFlipHorizontal && corner.x > 0.0f)
140 current.x -= size.width;
143 if(mFlipVertical && corner.y > 0.0f)
146 current.y -= size.height;
149 current.x -= std::max(corner.x, 0.0f);
150 current.y -= std::max(corner.y, 0.0f);
153 Vector3 mOffsetOrigin; ///< Manual Parent Offset Origin.
154 Vector3 mMinIndent; ///< Top-Left Margin
155 Vector3 mMaxIndent; ///< Bottom-Right Margin.
156 bool mFlipHorizontal; ///< Whether to flip actor's position if exceeds horizontal screen bounds
157 bool mFlipVertical; ///< Whether to flip actor's position if exceeds vertical screen bounds
162 // This example shows how to use the Magnifier component.
164 class ExampleController : public ConnectionTracker
168 * The example controller constructor.
169 * @param[in] application The application instance
171 ExampleController(Application& application)
172 : mApplication(application),
174 mAnimationTime(0.0f),
175 mAnimationTimeProperty(Property::INVALID_INDEX),
176 mMagnifierShown(false)
178 // Connect to the Application's Init signal
179 mApplication.InitSignal().Connect(this, &ExampleController::Create);
183 * The example controller destructor
187 // Nothing to do here;
191 * Invoked upon creation of application
192 * @param[in] application The application instance
194 void Create(Application& application)
196 Window window = application.GetWindow();
197 window.KeyEventSignal().Connect(this, &ExampleController::OnKeyEvent);
198 mWindowSize = window.GetSize();
200 // The Init signal is received once (only) during the Application lifetime
202 // Creates a default view with a default tool bar.
203 // The view is added to the window.
204 Toolkit::ToolBar toolBar;
205 mContent = DemoHelper::CreateView(application,
212 mContent.SetProperty(Actor::Property::LEAVE_REQUIRED, true);
213 mContent.TouchedSignal().Connect(this, &ExampleController::OnTouched);
215 // Create magnifier (controlled by human touch)
216 Layer overlay = Layer::New();
217 overlay.SetProperty(Actor::Property::SENSITIVE, false);
218 overlay.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
219 overlay.SetProperty(Actor::Property::SIZE, mWindowSize);
222 mMagnifier = Toolkit::Magnifier::New();
223 mMagnifier.SetSourceActor(mView);
224 mMagnifier.SetProperty(Actor::Property::SIZE, MAGNIFIER_SIZE * mWindowSize.width); // Size of magnifier is in relation to window width
225 mMagnifier.SetProperty(Toolkit::Magnifier::Property::MAGNIFICATION_FACTOR, MAGNIFICATION_FACTOR);
226 mMagnifier.SetProperty(Actor::Property::SCALE, Vector3::ZERO);
227 overlay.Add(mMagnifier);
229 // Apply constraint to animate the position of the magnifier.
230 Constraint constraint = Constraint::New<Vector3>(mMagnifier, Actor::Property::POSITION, ConfinementConstraint(Vector3(0.5f, 0.5f, 0.0f), Vector2::ONE * MAGNIFIER_INDENT, Vector2::ONE * MAGNIFIER_INDENT));
231 constraint.AddSource(LocalSource(Actor::Property::SIZE));
232 constraint.AddSource(LocalSource(Actor::Property::PARENT_ORIGIN));
233 constraint.AddSource(LocalSource(Actor::Property::ANCHOR_POINT));
234 constraint.AddSource(ParentSource(Actor::Property::SIZE));
235 constraint.SetRemoveAction(Constraint::DISCARD);
238 // Create bouncing magnifier automatically bounces around screen.
239 mBouncingMagnifier = Toolkit::Magnifier::New();
240 mBouncingMagnifier.SetSourceActor(mView);
241 mBouncingMagnifier.SetProperty(Actor::Property::SIZE, MAGNIFIER_SIZE * mWindowSize.width); // Size of magnifier is in relation to window width
242 mBouncingMagnifier.SetProperty(Toolkit::Magnifier::Property::MAGNIFICATION_FACTOR, MAGNIFICATION_FACTOR);
243 overlay.Add(mBouncingMagnifier);
245 mAnimationTimeProperty = mBouncingMagnifier.RegisterProperty("animationTime", 0.0f);
248 // Apply constraint to animate the position of the magnifier.
249 constraint = Constraint::New<Vector3>(mBouncingMagnifier, Actor::Property::POSITION, MagnifierPathConstraint(mWindowSize, mWindowSize * 0.5f));
250 constraint.AddSource(LocalSource(Actor::Property::SIZE));
251 constraint.AddSource(LocalSource(mAnimationTimeProperty));
254 // Apply constraint to animate the source of the magnifier.
255 constraint = Constraint::New<Vector3>(mBouncingMagnifier, Toolkit::Magnifier::Property::SOURCE_POSITION, MagnifierPathConstraint(mWindowSize));
256 constraint.AddSource(LocalSource(Actor::Property::SIZE));
257 constraint.AddSource(LocalSource(mAnimationTimeProperty));
262 * Invoked whenever the animation finishes (every 60 seconds)
263 * @param[in] animation The animation
265 void OnAnimationFinished(Animation& animation)
267 animation.FinishedSignal().Disconnect(this, &ExampleController::OnAnimationFinished);
273 * Resumes animation for another ANIMATION_DURATION seconds.
275 void ContinueAnimation()
277 Animation animation = Animation::New(ANIMATION_DURATION);
278 mAnimationTime += ANIMATION_DURATION;
279 animation.AnimateTo(Property(mBouncingMagnifier, mAnimationTimeProperty), mAnimationTime);
281 animation.FinishedSignal().Connect(this, &ExampleController::OnAnimationFinished);
285 * Invoked whenever the quit button is clicked
286 * @param[in] button the quit button
288 bool OnQuitButtonClicked(Toolkit::Button button)
290 // quit the application
296 * Invoked whenever the content (screen) is touched
297 * @param[in] actor The actor that received the touch
298 * @param[in] event The touch-event information
300 bool OnTouched(Actor actor, const TouchEvent& event)
302 if(event.GetPointCount() > 0)
304 switch(event.GetState(0))
306 case PointState::DOWN:
307 case PointState::MOTION:
313 case PointState::LEAVE:
314 case PointState::INTERRUPTED:
319 case PointState::STATIONARY:
325 Vector3 touchPoint(event.GetScreenPosition(0));
327 SetMagnifierPosition(touchPoint - mWindowSize * 0.5f);
334 * Shows the magnifier
340 Animation animation = Animation::New(MAGNIFIER_DISPLAY_DURATION);
341 animation.AnimateTo(Property(mMagnifier, Actor::Property::SCALE), Vector3::ONE, AlphaFunction::EASE_IN);
343 mMagnifierShown = true;
348 * Hides the magnifier
354 Animation animation = Animation::New(MAGNIFIER_DISPLAY_DURATION);
355 animation.AnimateTo(Property(mMagnifier, Actor::Property::SCALE), Vector3::ZERO, AlphaFunction::EASE_OUT);
357 mMagnifierShown = false;
362 * Manually sets the magnifier position
363 * @param[in] position The magnifier's position relative to center of window
365 void SetMagnifierPosition(const Vector3 position)
367 mMagnifier.SetProperty(Toolkit::Magnifier::Property::SOURCE_POSITION, position);
369 // position magnifier glass such that bottom edge is touching/near top of finger.
370 Vector3 glassPosition(position);
371 glassPosition.y -= mWindowSize.width * MAGNIFIER_SIZE.height * 0.5f + mApplication.GetWindow().GetDpi().GetHeight() * FINGER_RADIUS_INCHES;
373 mMagnifier.SetProperty(Actor::Property::POSITION, glassPosition);
376 void OnKeyEvent(const KeyEvent& event)
378 if(event.GetState() == KeyEvent::DOWN)
380 if(IsKey(event, Dali::DALI_KEY_ESCAPE) || IsKey(event, Dali::DALI_KEY_BACK))
388 Application& mApplication; ///< Application instance
389 Toolkit::Control mView; ///< The view
390 Layer mContent; ///< The content layer
391 Toolkit::Magnifier mMagnifier; ///< The manually controlled magnifier
392 Toolkit::Magnifier mBouncingMagnifier; ///< The animating magnifier (swirly animation)
393 Vector3 mWindowSize; ///< The size of the window
394 float mAnimationTime; ///< Keep track of start animation time.
395 Property::Index mAnimationTimeProperty; ///< Animation time property (responsible for swirly animation)
396 bool mMagnifierShown; ///< Flag indicating whether the magnifier is being shown or not.
399 int DALI_EXPORT_API main(int argc, char** argv)
401 Application application = Application::New(&argc, &argv, DEMO_THEME_PATH);
402 ExampleController test(application);
403 application.MainLoop();