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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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