Fix button and slider rendering for large sizes

Author: Niko-sk2x

src/main/java/io/github/opencubicchunks/cubicchunks/cubicgen/common/gui/component/CwgGuiButton.java

@@ -52,4 +52,20 @@ public void onClick(Consumer<CwgGuiButton> handler) {
         }
         return false;
     }
+
+
+    @Override public void drawButton(Minecraft mc, int mouseX, int mouseY, float partialTicks) {
+        if (!this.visible) {
+            return;
+        }
+        this.hovered = mouseX >= this.x && mouseY >= this.y && mouseX < this.x + this.width && mouseY < this.y + this.height;
+
+        McGuiRender.prepareWidgetRender(mc);
+        McGuiRender.ButtonMode mode = McGuiRender.ButtonMode.values()[this.getHoverState(this.hovered)];
+        McGuiRender.drawButtonBg(mode, this.x, this.y, this.width, this.height);
+
+        this.mouseDragged(mc, mouseX, mouseY);
+
+        McGuiRender.drawWidgetStringCentered(mc, this, packedFGColour, enabled, hovered);
+    }
 }

src/main/java/io/github/opencubicchunks/cubicchunks/cubicgen/common/gui/component/CwgGuiLabel.java

@@ -29,25 +29,15 @@
 
 public class CwgGuiLabel extends GuiButton {
 
-    private int color;
-
     public CwgGuiLabel(String formatString, int color) {
         super(0, 0, 0, I18n.format(formatString));
-        this.color = color;
+        this.packedFGColour = color;
         this.height = Minecraft.getMinecraft().fontRenderer.FONT_HEIGHT;
     }
 
-    public int getColor() {
-        return color;
-    }
-
-    public void setColor(int color) {
-        this.color = color;
-    }
-
     @Override public void drawButton(Minecraft mc, int mouseX, int mouseY, float partialTicks) {
         if (this.visible) {
-            drawString(mc.fontRenderer, displayString, x + 2, y + 2, color);
+            McGuiRender.drawWidgetString(mc, this, packedFGColour, enabled, false);
         }
     }
 }

src/main/java/io/github/opencubicchunks/cubicchunks/cubicgen/common/gui/component/CwgGuiSlider.java

@@ -72,6 +72,20 @@ public void setSliderValue(double sliderValue) {
         return 0;
     }
 
+    @Override public void drawButton(Minecraft mc, int mouseX, int mouseY, float partialTicks) {
+        if (!this.visible) {
+            return;
+        }
+        this.hovered = mouseX >= this.x && mouseY >= this.y && mouseX < this.x + this.width && mouseY < this.y + this.height;
+
+        McGuiRender.prepareWidgetRender(mc);
+        McGuiRender.drawSliderBg(this.x, this.y, this.width, this.height);
+
+        this.mouseDragged(mc, mouseX, mouseY);
+
+        McGuiRender.drawWidgetStringCentered(mc, this, packedFGColour, enabled, hovered);
+    }
+
     // this is actually a draw() method
 
     @Override protected void mouseDragged(Minecraft mc, int mouseX, int mouseY) {

src/main/java/io/github/opencubicchunks/cubicchunks/cubicgen/common/gui/component/McGuiRender.java

@@ -0,0 +1,102 @@
+/*
+ *  This file is part of Cubic World Generation, licensed under the MIT License (MIT).
+ *
+ *  Copyright (c) 2015-2020 contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in
+ *  all copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ *  THE SOFTWARE.
+ */
+package io.github.opencubicchunks.cubicchunks.cubicgen.common.gui.component;
+
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.Gui;
+import net.minecraft.client.gui.GuiButton;
+import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.util.ResourceLocation;
+
+public class McGuiRender {
+    protected static final ResourceLocation BUTTON_TEXTURES = new ResourceLocation("textures/gui/widgets.png");
+
+    private static final int BTN_TEX_MIN_X = 0;
+    private static final int BTN_TEX_MIN_Y = 46;
+    private static final int BTN_TEX_WIDTH = 200;
+    private static final int BTN_TEX_HEIGHT = 20;
+    private static final int WIDGETS_TEX_SIZE = 256;
+
+    public static void prepareWidgetRender(Minecraft mc) {
+        mc.getTextureManager().bindTexture(BUTTON_TEXTURES);
+        GlStateManager.color(1.0F, 1.0F, 1.0F, 1.0F);
+        GlStateManager.enableBlend();
+        GlStateManager.tryBlendFuncSeparate(GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA, GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ZERO);
+        GlStateManager.blendFunc(GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA);
+    }
+
+    public static void drawWidgetStringCentered(Minecraft mc, GuiButton btn, int colorOverride, boolean enabled, boolean hovered) {
+        int color = 0xe0e0e0;
+        if (colorOverride != 0) {
+            color = colorOverride;
+        } else if (!enabled) {
+            color = 0xa0a0a0;
+        } else if (hovered) {
+            color = 0xffffa0;
+        }
+        btn.drawCenteredString(mc.fontRenderer, btn.displayString, btn.x + btn.width / 2, btn.y + (btn.height - 8) / 2, color);
+    }
+
+    public static void drawWidgetString(Minecraft mc, GuiButton btn, int colorOverride, boolean enabled, boolean hovered) {
+        int color = 0xe0e0e0;
+        if (colorOverride != 0) {
+            color = colorOverride;
+        } else if (!enabled) {
+            color = 0xa0a0a0;
+        } else if (hovered) {
+            color = 0xffffa0;
+        }
+        btn.drawString(mc.fontRenderer, btn.displayString, btn.x, btn.y + (btn.height - 8) / 2, color);
+    }
+
+    public static void drawSliderBg(int x, int y, int width, int height) {
+        drawButtonBg(ButtonMode.DISABLED, x, y, width, height);
+    }
+
+    public static void drawButtonBg(ButtonMode mode, int x, int y, int width, int height) {
+        int yOffset = mode.ordinal() * BTN_TEX_HEIGHT;
+        int texWidth = width / 2;
+        if (texWidth > 180) {
+            texWidth = 180;
+        }
+        Gui.drawScaledCustomSizeModalRect(
+                x, y,
+                BTN_TEX_MIN_X, BTN_TEX_MIN_Y + yOffset,
+                texWidth, BTN_TEX_HEIGHT,
+                width / 2, height,
+                WIDGETS_TEX_SIZE, WIDGETS_TEX_SIZE
+        );
+        Gui.drawScaledCustomSizeModalRect(
+                x + width / 2, y,
+                BTN_TEX_MIN_X + BTN_TEX_WIDTH - texWidth, BTN_TEX_MIN_Y + yOffset,
+                texWidth, BTN_TEX_HEIGHT,
+                width - width / 2, height,
+                WIDGETS_TEX_SIZE, WIDGETS_TEX_SIZE
+        );
+    }
+
+    public enum ButtonMode {
+        DISABLED, ENABLED, HOVERED
+    }
+}