Added set/getScrollingSpeed methods and updated ScrollBarTestGui.java (…

…#218)

src/main/java/io/github/cottonmc/cotton/gui/widget/WScrollBar.java

@@ -15,7 +15,8 @@
 
 public class WScrollBar extends WWidget {
 	private static final Identifier FOCUS_TEXTURE = new Identifier(LibGuiCommon.MOD_ID, "widget/scroll_bar/focus");
-	private static final int SCROLLING_SPEED = 4;
+	public static final int DEFAULT_SCROLLING_SPEED = 4;
+	private int scrollingSpeed = 4;
 
 	protected Axis axis = Axis.HORIZONTAL;
 	protected int value;
@@ -203,7 +204,7 @@ public InputResult onKeyPressed(int ch, int key, int modifiers) {
 	@Environment(EnvType.CLIENT)
 	@Override
 	public InputResult onMouseScroll(int x, int y, double horizontalAmount, double verticalAmount) {
-		setValue(getValue() + (int) (horizontalAmount - verticalAmount) * SCROLLING_SPEED);
+		setValue(getValue() + (int) (horizontalAmount - verticalAmount) * scrollingSpeed);
 		return InputResult.PROCESSED;
 	}
 
@@ -227,6 +228,30 @@ public WScrollBar setMaxValue(int max) {
 		return this;
 	}
 
+	/**
+	 * Sets the mouse scroll speed;
+	 * <p>
+	 * Default value: {@value #DEFAULT_SCROLLING_SPEED}
+	 * @param scrollingSpeed the scroll speed
+	 * @return this scroll bar
+	 */
+	public WScrollBar setScrollingSpeed(int scrollingSpeed) {
+		if(scrollingSpeed < 0) throw new IllegalArgumentException("Negative value for scrolling speed");
+		if(scrollingSpeed == 0) throw new IllegalArgumentException("Zero value for scrolling speed");
+
+		this.scrollingSpeed = scrollingSpeed;
+		return this;
+	}
+
+	/**
+	 * Gets the mouse scroll speed;
+	 * <p>
+	 * Default value: {@value #DEFAULT_SCROLLING_SPEED}
+	 */
+	public int getScrollingSpeed() {
+		return scrollingSpeed;
+	}
+
 	public int getWindow() {
 		return window;
 	}

src/testMod/java/io/github/cottonmc/test/client/ScrollBarTestGui.java

@@ -1,13 +1,18 @@
 package io.github.cottonmc.test.client;
 
 import net.fabricmc.fabric.api.util.TriState;
+import net.minecraft.text.Text;
 
 import io.github.cottonmc.cotton.gui.client.LightweightGuiDescription;
+import io.github.cottonmc.cotton.gui.widget.WLabel;
 import io.github.cottonmc.cotton.gui.widget.WPlainPanel;
 import io.github.cottonmc.cotton.gui.widget.WScrollBar;
+import io.github.cottonmc.cotton.gui.widget.WSlider;
 import io.github.cottonmc.cotton.gui.widget.WToggleButton;
 import io.github.cottonmc.cotton.gui.widget.data.Axis;
+import io.github.cottonmc.cotton.gui.widget.data.HorizontalAlignment;
 import io.github.cottonmc.cotton.gui.widget.data.Insets;
+import io.github.cottonmc.cotton.gui.widget.data.VerticalAlignment;
 
 public class ScrollBarTestGui extends LightweightGuiDescription {
 	private boolean darkMode = false;
@@ -18,21 +23,37 @@ public ScrollBarTestGui() {
 		root.setSize(256, 240);
 		root.setInsets(Insets.ROOT_PANEL);
 
-		WScrollBar scrollBar1 = new WScrollBar(Axis.HORIZONTAL);
-		root.add(scrollBar1, 0, 0, 256, 16);
+		WScrollBar scrollBarTop = new WScrollBar(Axis.HORIZONTAL);
+		root.add(scrollBarTop, 0, 0, 256, 16);
 
-		WScrollBar scrollBar2 = new WScrollBar(Axis.HORIZONTAL);
-		root.add(scrollBar2, 0, 240 - scrollBar2.getHeight(), 256, 8);
+		WScrollBar scrollBarDown = new WScrollBar(Axis.HORIZONTAL);
+		root.add(scrollBarDown, 0, 240 - scrollBarDown.getHeight(), 256, 8);
 
-		WScrollBar scrollBar3 = new WScrollBar(Axis.VERTICAL);
-		root.add(scrollBar3, 0, 18, 16, 202);
+		WScrollBar scrollBarLeft = new WScrollBar(Axis.VERTICAL);
+		root.add(scrollBarLeft, 0, 18, 16, 202);
 
-		WScrollBar scrollBar4 = new WScrollBar(Axis.VERTICAL);
-		root.add(scrollBar4, 248, 18, 8, 202);
+		WScrollBar scrollBarRight = new WScrollBar(Axis.VERTICAL);
+		root.add(scrollBarRight, 248, 18, 8, 202);
+
+		WLabel label = new WLabel(Text.of("Scrolling Speed: 4"));
+		label.setHorizontalAlignment(HorizontalAlignment.CENTER);
+		label.setVerticalAlignment(VerticalAlignment.CENTER);
+		root.add(label, 32, 112, 192, 16);
+
+		WSlider slider = new WSlider(1, 100, Axis.HORIZONTAL);
+		slider.setDraggingFinishedListener(i -> {
+			label.setText(Text.of("Scrolling Speed: " + i));
+
+			scrollBarTop.setScrollingSpeed(i);
+			scrollBarDown.setScrollingSpeed(i);
+			scrollBarLeft.setScrollingSpeed(i);
+			scrollBarRight.setScrollingSpeed(i);
+		});
+		root.add(slider, 78, 128, 100, 16);
 
 		WToggleButton toggleButton = new WToggleButton();
 		toggleButton.setOnToggle(on -> darkMode = on);
-		root.add(toggleButton, 128 - (toggleButton.getWidth() / 2), 120 - (toggleButton.getHeight() / 2));
+		root.add(toggleButton, 128 - (toggleButton.getWidth() / 2), 104 - (toggleButton.getHeight() / 2));
 
 		root.validate(this);
 	}