added the option to disable buttons

Demos/UiDemo.cs

@@ -208,6 +208,7 @@ namespace Demos {
             });
 
             root.AddChild(ElementHelper.ImageButton(Anchor.AutoLeft, new Vector2(1, 10), tree, "Button with image")).PositionOffset = new Vector2(0, 1);
+            root.AddChild(new Button(Anchor.AutoLeft, new Vector2(1, 10), "Disabled button") {IsDisabled = true}).PositionOffset = new Vector2(0, 1);
 
             // Below are some querying examples that help you find certain elements easily
 

MLEM.Ui/Elements/Button.cs

@@ -11,9 +11,21 @@ namespace MLEM.Ui.Elements {
         public StyleProp<Color> NormalColor = Color.White;
         public StyleProp<NinePatch> HoveredTexture;
         public StyleProp<Color> HoveredColor;
+        public StyleProp<NinePatch> DisabledTexture;
+        public StyleProp<Color> DisabledColor;
         public Paragraph Text;
         public Tooltip Tooltip;
 
+        private bool isDisabled;
+        public bool IsDisabled {
+            get => this.isDisabled;
+            set {
+                this.isDisabled = value;
+                this.CanBePressed = !value;
+                this.CanBeSelected = !value;
+            }
+        }
+
         public Button(Anchor anchor, Vector2 size, string text = null, string tooltipText = null, float tooltipWidth = 50) : base(anchor, size) {
             if (text != null) {
                 this.Text = new Paragraph(Anchor.Center, 1, text, true);
@@ -26,7 +38,10 @@ namespace MLEM.Ui.Elements {
         public override void Draw(GameTime time, SpriteBatch batch, float alpha, BlendState blendState, SamplerState samplerState, Matrix matrix) {
             var tex = this.Texture;
             var color = (Color) this.NormalColor * alpha;
-            if (this.IsMouseOver) {
+            if (this.IsDisabled) {
+                tex = this.DisabledTexture.OrDefault(tex);
+                color = (Color) this.DisabledColor * alpha;
+            } else if (this.IsMouseOver) {
                 tex = this.HoveredTexture.OrDefault(tex);
                 color = (Color) this.HoveredColor * alpha;
             }
@@ -39,6 +54,8 @@ namespace MLEM.Ui.Elements {
             this.Texture.SetFromStyle(style.ButtonTexture);
             this.HoveredTexture.SetFromStyle(style.ButtonHoveredTexture);
             this.HoveredColor.SetFromStyle(style.ButtonHoveredColor);
+            this.DisabledTexture.SetFromStyle(style.ButtonDisabledTexture);
+            this.DisabledColor.SetFromStyle(style.ButtonDisabledColor);
         }
 
     }

MLEM.Ui/Elements/Element.cs

@@ -113,6 +113,7 @@ namespace MLEM.Ui.Elements {
         }
         public bool CanBeSelected = true;
         public bool CanBeMoused = true;
+        public bool CanBePressed = true;
         public float DrawAlpha = 1;
         public bool SetHeightBasedOnChildren;
         public bool SetWidthBasedOnChildren;

MLEM.Ui/Style/UiStyle.cs

@@ -11,6 +11,8 @@ namespace MLEM.Ui.Style {
         public NinePatch ButtonTexture;
         public NinePatch ButtonHoveredTexture;
         public Color ButtonHoveredColor;
+        public NinePatch ButtonDisabledTexture;
+        public Color ButtonDisabledColor;
         public NinePatch PanelTexture;
         public NinePatch TextFieldTexture;
         public NinePatch TextFieldHoveredTexture;

MLEM.Ui/Style/UntexturedStyle.cs

@@ -13,6 +13,7 @@ namespace MLEM.Ui.Style {
             this.SelectionIndicator = batch.GenerateTexture(Color.Transparent, Color.Red);
             this.ButtonTexture = batch.GenerateTexture(Color.CadetBlue);
             this.ButtonHoveredColor = Color.LightGray;
+            this.ButtonDisabledColor = Color.Gray;
             this.PanelTexture = batch.GenerateTexture(Color.Gray);
             this.TextFieldTexture = batch.GenerateTexture(Color.MediumBlue);
             this.TextFieldHoveredColor = Color.LightGray;

MLEM.Ui/UiControls.cs

@@ -64,11 +64,11 @@ namespace MLEM.Ui {
                     this.IsAutoNavMode = false;
                     var selectedNow = mousedNow != null && mousedNow.CanBeSelected ? mousedNow : null;
                     this.ActiveRoot?.SelectElement(selectedNow);
-                    if (mousedNow != null)
+                    if (mousedNow != null && mousedNow.CanBePressed)
                         this.System.OnElementPressed?.Invoke(mousedNow);
                 } else if (this.Input.IsMouseButtonPressed(MouseButton.Right)) {
                     this.IsAutoNavMode = false;
-                    if (mousedNow != null)
+                    if (mousedNow != null && mousedNow.CanBePressed)
                         this.System.OnElementSecondaryPressed?.Invoke(mousedNow);
                 }
             }
@@ -76,7 +76,7 @@ namespace MLEM.Ui {
             // KEYBOARD INPUT
             if (this.HandleKeyboard) {
                 if (this.KeyboardButtons.Any(this.Input.IsKeyPressed)) {
-                    if (this.SelectedElement?.Root != null) {
+                    if (this.SelectedElement?.Root != null && this.SelectedElement.CanBePressed) {
                         if (this.Input.IsModifierKeyDown(ModifierKey.Shift)) {
                             // secondary action on element using space or enter
                             this.System.OnElementSecondaryPressed?.Invoke(this.SelectedElement);
@@ -102,13 +102,13 @@ namespace MLEM.Ui {
                     this.IsAutoNavMode = false;
                     var tapped = this.GetElementUnderPos(tap.Position);
                     this.ActiveRoot?.SelectElement(tapped);
-                    if (tapped != null)
+                    if (tapped != null && tapped.CanBePressed)
                         this.System.OnElementPressed?.Invoke(tapped);
                 } else if (this.Input.GetGesture(GestureType.Hold, out var hold)) {
                     this.IsAutoNavMode = false;
                     var held = this.GetElementUnderPos(hold.Position);
                     this.ActiveRoot?.SelectElement(held);
-                    if (held != null)
+                    if (held != null && held.CanBePressed)
                         this.System.OnElementSecondaryPressed?.Invoke(held);
                 }
             }
@@ -116,10 +116,10 @@ namespace MLEM.Ui {
             // GAMEPAD INPUT
             if (this.HandleGamepad) {
                 if (this.GamepadButtons.Any(b => this.IsGamepadPressed(b))) {
-                    if (this.SelectedElement?.Root != null)
+                    if (this.SelectedElement?.Root != null && this.SelectedElement.CanBePressed)
                         this.System.OnElementPressed?.Invoke(this.SelectedElement);
                 } else if (this.SecondaryGamepadButtons.Any(b => this.IsGamepadPressed(b))) {
-                    if (this.SelectedElement?.Root != null)
+                    if (this.SelectedElement?.Root != null && this.SelectedElement.CanBePressed)
                         this.System.OnElementSecondaryPressed?.Invoke(this.SelectedElement);
                 } else if (this.DownButtons.Any(this.IsGamepadPressed)) {
                     this.HandleGamepadNextElement(Direction2.Down);