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src/EgamiFlowScreensaver/AlphaChangeScreensaverImageItemBehavior.cs
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,100 @@ | ||
| // <copyright file="AlphaChangeScreensaverImageItemBehavior.cs" company="natsnudasoft"> | ||
| // Copyright (c) Adrian John Dunstan. All rights reserved. | ||
| // | ||
| // 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. | ||
| // </copyright> | ||
|
|
||
| namespace Natsnudasoft.EgamiFlowScreensaver | ||
| { | ||
| using System; | ||
| using Microsoft.Xna.Framework; | ||
|
|
||
| /// <summary> | ||
| /// Provides a behaviour to apply to an image item that causes the image item to transition from | ||
| /// one alpha value to another over a specified time frame. | ||
| /// </summary> | ||
| /// <seealso cref="TransitionScreensaverImageItemBehavior"/> | ||
| public sealed class AlphaChangeScreensaverImageItemBehavior : | ||
| TransitionScreensaverImageItemBehavior | ||
| { | ||
| /// <summary> | ||
| /// Initializes a new instance of the <see cref="AlphaChangeScreensaverImageItemBehavior"/> | ||
| /// class. | ||
| /// </summary> | ||
| /// <param name="screensaverArea">The description of the area of the screensaver.</param> | ||
| /// <param name="startAlpha">The alpha value that the image item this behaviour is applied | ||
| /// to will start at. This value can be out of range to delay the start of the transition. | ||
| /// </param> | ||
| /// <param name="endAlpha">The alpha value that the image item this behaviour is applied to | ||
| /// will finish at. This value can be out of range to advance to the end of the transition | ||
| /// faster.</param> | ||
| /// <param name="transitionTime">The time the image item this behaviour is applied to will | ||
| /// take to transition between the specified alpha values.</param> | ||
| /// <exception cref="ArgumentNullException"><paramref name="screensaverArea"/> is | ||
| /// <see langword="null"/>.</exception> | ||
| /// <exception cref="ArgumentOutOfRangeException"><paramref name="transitionTime"/> is less | ||
| /// than a zero time.</exception> | ||
| public AlphaChangeScreensaverImageItemBehavior( | ||
| ScreensaverArea screensaverArea, | ||
| float startAlpha, | ||
| float endAlpha, | ||
| TimeSpan transitionTime) | ||
| : base( | ||
| screensaverArea, | ||
| transitionTime, | ||
| (s, p) => s.Alpha = | ||
| MathHelper.Clamp(MathHelper.Lerp(startAlpha, endAlpha, p), 0f, 1f)) | ||
| { | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Initializes a new instance of the <see cref="AlphaChangeScreensaverImageItemBehavior"/> | ||
| /// class. | ||
| /// </summary> | ||
| /// <param name="screensaverArea">The description of the area of the screensaver.</param> | ||
| /// <param name="startAlpha">The alpha value that the image item this behaviour is applied | ||
| /// to will start at. This value can be out of range to delay the start of the transition. | ||
| /// </param> | ||
| /// <param name="endAlpha">The alpha value that the image item this behaviour is applied to | ||
| /// will finish at. This value can be out of range to advance to the end of the transition | ||
| /// faster.</param> | ||
| /// <param name="transitionTime">The time the image item this behaviour is applied to will | ||
| /// take to transition between the specified alpha values.</param> | ||
| /// <param name="endTransitionAlpha">The alpha value that the image item this behaviour is | ||
| /// applied to will finish at when it is being destroyed (starting from | ||
| /// <paramref name="endAlpha"/>).</param> | ||
| /// <param name="endTransitionTime">The time the image item this behaviour is applied to | ||
| /// will take to transition when it is being destroyed.</param> | ||
| /// <exception cref="ArgumentNullException"><paramref name="screensaverArea"/> is | ||
| /// <see langword="null"/>.</exception> | ||
| /// <exception cref="ArgumentOutOfRangeException"><paramref name="transitionTime"/>, or | ||
| /// <paramref name="endTransitionTime"/> is less than a zero time.</exception> | ||
| public AlphaChangeScreensaverImageItemBehavior( | ||
| ScreensaverArea screensaverArea, | ||
| float startAlpha, | ||
| float endAlpha, | ||
| TimeSpan transitionTime, | ||
| float endTransitionAlpha, | ||
| TimeSpan endTransitionTime) | ||
| : base( | ||
| screensaverArea, | ||
| transitionTime, | ||
| (s, p) => s.Alpha = | ||
| MathHelper.Clamp(MathHelper.Lerp(startAlpha, endAlpha, p), 0f, 1f), | ||
| endTransitionTime, | ||
| (s, p) => s.Alpha = | ||
| MathHelper.Clamp(MathHelper.Lerp(endAlpha, endTransitionAlpha, p), 0f, 1f)) | ||
| { | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,119 @@ | ||
| // <copyright file="BottomLeftImageEmitDetails.cs" company="natsnudasoft"> | ||
| // Copyright (c) Adrian John Dunstan. All rights reserved. | ||
| // | ||
| // 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. | ||
| // </copyright> | ||
|
|
||
| namespace Natsnudasoft.EgamiFlowScreensaver | ||
| { | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using Microsoft.Xna.Framework; | ||
| using Microsoft.Xna.Framework.Graphics; | ||
| using Natsnudasoft.EgamiFlowScreensaver.Config; | ||
| using Natsnudasoft.NatsnudaLibrary; | ||
|
|
||
| /// <summary> | ||
| /// Provides a class capable of creating locations at the bottom left of a screen for a | ||
| /// <see cref="ScreensaverImageEmitter" />. | ||
| /// </summary> | ||
| public sealed class BottomLeftImageEmitDetails : ImageEmitDetails | ||
| { | ||
| /// <summary> | ||
| /// Initializes a new instance of the <see cref="BottomLeftImageEmitDetails"/> class. | ||
| /// </summary> | ||
| /// <param name="screensaverArea">The description of the area of the screensaver.</param> | ||
| /// <param name="screensaverConfiguration">The <see cref="ScreensaverConfiguration"/> | ||
| /// representing the configured state of the screensaver.</param> | ||
| /// <param name="behaviorFactories">A collection of factories that define how to create | ||
| /// behaviours that will be attached to any images emitted by a | ||
| /// <see cref="ScreensaverImageEmitter"/>.</param> | ||
| /// <exception cref="ArgumentNullException"><paramref name="screensaverArea"/>, | ||
| /// <paramref name="screensaverConfiguration"/>, or <paramref name="behaviorFactories"/> | ||
| /// is <see langword="null"/>.</exception> | ||
| public BottomLeftImageEmitDetails( | ||
| ScreensaverArea screensaverArea, | ||
| ScreensaverConfiguration screensaverConfiguration, | ||
| IEnumerable<Func<IScreensaverImageItemBehavior>> behaviorFactories) | ||
| : base(screensaverArea, screensaverConfiguration, behaviorFactories) | ||
| { | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Initializes a new instance of the <see cref="BottomLeftImageEmitDetails"/> class. | ||
| /// </summary> | ||
| /// <param name="screensaverArea">The description of the area of the screensaver.</param> | ||
| /// <param name="screensaverConfiguration">The <see cref="ScreensaverConfiguration"/> | ||
| /// representing the configured state of the screensaver.</param> | ||
| /// <param name="behaviorFactories">A collection of factories that define how to create | ||
| /// behaviours that will be attached to any images emitted by a | ||
| /// <see cref="ScreensaverImageEmitter"/>.</param> | ||
| /// <param name="random">A pseudo-random number generator that can be used to generate | ||
| /// randomness in the <see cref="BottomLeftImageEmitDetails"/>.</param> | ||
| /// <exception cref="ArgumentNullException"><paramref name="screensaverArea"/>, | ||
| /// <paramref name="screensaverConfiguration"/>, <paramref name="behaviorFactories"/>, or | ||
| /// <paramref name="random"/> is <see langword="null"/>.</exception> | ||
| public BottomLeftImageEmitDetails( | ||
| ScreensaverArea screensaverArea, | ||
| ScreensaverConfiguration screensaverConfiguration, | ||
| IEnumerable<Func<IScreensaverImageItemBehavior>> behaviorFactories, | ||
| Random random) | ||
| : base(screensaverArea, screensaverConfiguration, behaviorFactories, random) | ||
| { | ||
| } | ||
|
|
||
| /// <inheritdoc/> | ||
| /// <exception cref="ArgumentNullException"><paramref name="texture"/> is | ||
| /// <see langword="null"/>.</exception> | ||
| public override ScreensaverImageItem CreateScreensaverImageItem(Texture2D texture) | ||
| { | ||
| ParameterValidation.IsNotNull(texture, nameof(texture)); | ||
|
|
||
| var origin = new Vector2(texture.Width, texture.Height) / 2f; | ||
| var bottomLeftPrimary = new Point( | ||
| this.ScreensaverArea.PrimaryGameBounds.Left, | ||
| this.ScreensaverArea.PrimaryGameBounds.Bottom); | ||
| var maxX = bottomLeftPrimary.X - texture.Width + origin.X; | ||
| var minX = maxX - TwoPositionDistribution; | ||
| var minY = bottomLeftPrimary.Y + origin.Y; | ||
| var maxY = minY + TwoPositionDistribution; | ||
| var position = new Vector2( | ||
| this.Random.NextFloat(minX, maxX), | ||
| this.Random.NextFloat(minY, maxY)); | ||
| return new ScreensaverImageItem( | ||
| texture, | ||
| this.BehaviorFactories.Select(f => f?.Invoke())) | ||
| { | ||
| Position = position, | ||
| Origin = origin | ||
| }; | ||
| } | ||
|
|
||
| /// <inheritdoc/> | ||
| protected override Func<IScreensaverImageItemBehavior> CreateDefaultMovingBehaviorFactory() | ||
| { | ||
| IScreensaverImageItemBehavior CreateDefaultMovingBehavior() | ||
| { | ||
| const float minSpeed = MovingScreensaverImageItemBehavior.DefaultMinSpeed; | ||
| const float maxSpeed = MovingScreensaverImageItemBehavior.DefaultMaxSpeed; | ||
| var speed = new Vector2( | ||
| this.Random.NextFloat(minSpeed, maxSpeed), | ||
| -this.Random.NextFloat(minSpeed, maxSpeed)); | ||
| return new MovingScreensaverImageItemBehavior(this.ScreensaverArea, speed); | ||
| } | ||
|
|
||
| return CreateDefaultMovingBehavior; | ||
| } | ||
| } | ||
| } |
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