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Diffstat (limited to 'source/ui/elements/Button.cs')
| -rw-r--r-- | source/ui/elements/Button.cs | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/source/ui/elements/Button.cs b/source/ui/elements/Button.cs new file mode 100644 index 0000000..81a6aed --- /dev/null +++ b/source/ui/elements/Button.cs @@ -0,0 +1,173 @@ +using Celesteia.UI.Properties; +using Microsoft.Xna.Framework; +using Microsoft.Xna.Framework.Graphics; +using MonoGame.Extended.Input; +using MonoGame.Extended.TextureAtlases; + +namespace Celesteia.UI.Elements { + public class Button : Clickable { + public Button(Rect rect) { + SetRect(rect); + } + + public Button SetNewRect(Rect rect) { + SetRect(rect); + return this; + } + + public Button SetPivotPoint(Vector2 pivot) { + SetPivot(pivot); + return this; + } + + // TEXT PROPERTIES + + private TextProperties _text; + + public Button SetTextProperties(TextProperties text) { + _text = text; + return this; + } + + public Button SetText(string text) { + _text.SetText(text); + return this; + } + + // COLOR PROPERTIES + + private ButtonColorGroup _colorGroup = new ButtonColorGroup(Color.White); + private Color ButtonColor = Color.White; + private bool ButtonEnabled = true; + + public Button SetColorGroup(ButtonColorGroup colorGroup) { + _colorGroup = colorGroup; + return this; + } + + public Button SetButtonEnabled(bool enabled) { + ButtonEnabled = enabled; + return this; + } + + // CLICKING PROPERTIES + + private ClickEvent _onMouseDown = null; + private ClickEvent _onMouseUp = null; + + public Button SetOnMouseDown(ClickEvent func) { + _onMouseDown = func; + return this; + } + + public Button SetOnMouseUp(ClickEvent func) { + _onMouseUp = func; + return this; + } + + public override void OnMouseDown(MouseButton button, Point position) { + base.OnMouseDown(button, position); + _onMouseDown?.Invoke(button, position); + } + + public override void OnMouseUp(MouseButton button, Point position) { + base.OnMouseUp(button, position); + _onMouseUp?.Invoke(button, position); + } + + // DRAWING PROPERTIES + + private Texture2D _texture; + private TextureAtlas _patches; + private int _patchSize; + + public Button SetTexture(Texture2D texture) { + _texture = texture; + return this; + } + + public Button MakePatches(int size) { + if (_texture != null) { + _patchSize = size; + _patches = TextureAtlas.Create("buttonPatches", _texture, _patchSize, _patchSize); + } + return this; + } + + // https://gamedev.stackexchange.com/a/118255 + private float _colorAmount = 0.0f; + private bool _prevMouseOver = false; + private bool _prevClicked = false; + public override void Update(GameTime gameTime, out bool clickedAnything) { + clickedAnything = false; + if (ButtonColor == GetTargetColor()) return; + + if (_prevMouseOver != GetMouseOver() || _prevClicked != GetClicked()) _colorAmount = 0.0f; + + _colorAmount += (float)gameTime.ElapsedGameTime.TotalSeconds / 0.5f; + + if (_colorAmount > 1.0f) + _colorAmount = 0.0f; + + ButtonColor = Color.Lerp(ButtonColor, GetTargetColor(), _colorAmount); + + _prevMouseOver = GetMouseOver(); + _prevClicked = GetClicked(); + } + + Rectangle rectangle; + public override void Draw(SpriteBatch spriteBatch) + { + rectangle = GetRectangle(); + + // Draw the button's texture. + if (_patches != null) ImageUtilities.DrawPatched(spriteBatch, rectangle, _patches, _patchSize, ButtonColor); + else spriteBatch.Draw(GetTexture(spriteBatch), rectangle, null, ButtonColor); + + TextUtilities.DrawAlignedText(spriteBatch, rectangle, _text); + } + + public Texture2D GetTexture(SpriteBatch spriteBatch) { + if (_texture == null) { + _texture = new Texture2D(spriteBatch.GraphicsDevice, 1, 1); + _texture.SetData(new[] { Color.Gray }); + } + + return _texture; + } + + private Color GetTargetColor() { + return ButtonEnabled ? (GetMouseOver() ? (GetClicked() ? _colorGroup.Active : _colorGroup.Hover) : _colorGroup.Normal) : _colorGroup.Disabled; + } + + public Button Clone() { + return new Button(GetRect()) + .SetPivotPoint(GetPivot()) + .SetOnMouseDown(_onMouseDown) + .SetOnMouseUp(_onMouseUp) + .SetTexture(_texture) + .MakePatches(_patchSize) + .SetTextProperties(_text) + .SetColorGroup(_colorGroup); + } + } + + public struct ButtonColorGroup { + public Color Normal; + public Color Disabled; + public Color Hover; + public Color Active; + + public ButtonColorGroup(Color normal, Color disabled, Color hover, Color active) { + Normal = normal; + Disabled = disabled; + Hover = hover; + Active = active; + } + + public ButtonColorGroup(Color normal, Color disabled, Color hover) : this (normal, disabled, hover, normal) {} + + public ButtonColorGroup(Color normal, Color disabled) : this (normal, disabled, normal, normal) {} + public ButtonColorGroup(Color normal) : this (normal, normal, normal, normal) {} + } +}
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