tcr/java/src/game/gui/element/GuiList.java

package game.gui.element;

import java.util.List;

import org.lwjgl.opengl.GL11;

import com.google.common.collect.Lists;

import game.gui.Gui;
import game.renderer.DefaultVertexFormats;
import game.renderer.Drawing;
import game.renderer.GlState;
import game.renderer.RenderBuffer;
import game.renderer.Tessellator;
import game.util.ExtMath;
import game.window.Button;

public abstract class GuiList<T extends ListEntry> extends Gui
{
    protected final List<T> elements = Lists.newArrayList();
    
    protected int width;
    protected int height;
    
    protected int top;
    protected int bottom;
    protected int right;
    protected int left;
    protected int mouseX;
    protected int mouseY;
    protected int initialClickY = -2;
    protected float scrollMultiplier;
    protected float amountScrolled;
    protected int selectedElement = -1;
    protected long lastClicked;

    public abstract int getListWidth(); // 220

    public abstract int getSlotHeight();

    protected int getScrollBarX()
    {
        return 0;
    }

    public void setDimensions(int widthIn, int heightIn, int topIn, int bottomIn)
    {
        this.width = widthIn;
        this.height = heightIn;
        this.top = topIn;
        this.bottom = bottomIn;
        this.left = 0;
        this.right = widthIn;
    }

    public void init(int width, int height) {

		this.selectedElement = -1;
    }

    public void setSlotXBoundsFromLeft(int leftIn)
    {
        this.left = leftIn;
        this.right = leftIn + this.width;
    }

    public final T getListEntry(int index) {
    	return this.elements.get(index);
    }

    public final T getSelected() {
    	return this.selectedElement < 0 ? null : this.elements.get(this.selectedElement);
    }
    
    public final int getSize() {
    	return this.elements.size();
    }
    
    public final void setSelected(int index) {
        this.selectedElement = index;
    }

    protected int getContentHeight()
    {
        return this.getSize() * this.getSlotHeight();
    }
    
    public int getSlotIndexFromScreenCoords(int x, int y)
    {
        int i = this.left + this.width / 2 - this.getListWidth() / 2;
        int j = this.left + this.width / 2 + this.getListWidth() / 2;
        int k = y - this.top + (int)this.amountScrolled - 4;
        int l = k / this.getSlotHeight();
        return this.isInList(x, y) && x >= i && x <= j && l >= 0 && k >= 0 && l < this.getSize() ? l : -1;
    }

    protected boolean isInList(int x, int y)
    {
    	return x >= this.getScrollBarX() + 6; // x < this.getScrollBarX();
    }

    protected final boolean isSelected(int slotIndex)
    {
        return slotIndex == this.selectedElement;
    }

    protected void bindAmountScrolled()
    {
        this.amountScrolled = ExtMath.clampf(this.amountScrolled, 0.0F, (float)this.getMaxScroll());
    }

    public int getMaxScroll()
    {
        return Math.max(0, this.getContentHeight() - (this.bottom - this.top - 4));
    }

    public int getAmountScrolled()
    {
        return (int)this.amountScrolled;
    }

    public boolean isMouseYWithinSlotBounds(int p_148141_1_)
    {
        return p_148141_1_ >= this.top && p_148141_1_ <= this.bottom && this.mouseX >= this.left && this.mouseX <= this.right;
    }

    public void scrollBy(int amount)
    {
        this.amountScrolled += (float)amount;
        this.bindAmountScrolled();
        this.initialClickY = -2;
    }

//    public void actionPerformed(Button button)
//    {
//        if (button.enabled)
//        {
//            if (button.id == this.scrollUpButtonID)
//            {
//                this.amountScrolled -= (float)(this.slotHeight * 2 / 3);
//                this.initialClickY = -2;
//                this.bindAmountScrolled();
//            }
//            else if (button.id == this.scrollDownButtonID)
//            {
//                this.amountScrolled += (float)(this.slotHeight * 2 / 3);
//                this.initialClickY = -2;
//                this.bindAmountScrolled();
//            }
//        }
//    }

	public void draw()
    {
    	int mouseXIn = this.gm.mouse_x;
    	int mouseYIn = this.gm.mouse_y;
        this.mouseX = mouseXIn;
        this.mouseY = mouseYIn;
        this.drawBackground();
        int i = this.getScrollBarX();
        int j = i + 6;
        this.bindAmountScrolled();
        GlState.disableLighting();
        GlState.disableFog();
        GlState.enableTexture2D();
        RenderBuffer worldrenderer = Tessellator.getBuffer();
        this.gm.getTextureManager().bindTexture(Gui.DIRT_BACKGROUND);
        GlState.color(1.0F, 1.0F, 1.0F, 1.0F);
        
        float f = 32.0F;
        worldrenderer.begin(7, DefaultVertexFormats.POSITION_TEX_COLOR);
        worldrenderer.pos((double)this.left, (double)this.bottom, 0.0D).tex((double)((float)this.left / f), (double)((float)(this.bottom + (int)this.amountScrolled) / f)).color(32, 32, 32, 255).endVertex();
        worldrenderer.pos((double)this.right, (double)this.bottom, 0.0D).tex((double)((float)this.right / f), (double)((float)(this.bottom + (int)this.amountScrolled) / f)).color(32, 32, 32, 255).endVertex();
        worldrenderer.pos((double)this.right, (double)this.top, 0.0D).tex((double)((float)this.right / f), (double)((float)(this.top + (int)this.amountScrolled) / f)).color(32, 32, 32, 255).endVertex();
        worldrenderer.pos((double)this.left, (double)this.top, 0.0D).tex((double)((float)this.left / f), (double)((float)(this.top + (int)this.amountScrolled) / f)).color(32, 32, 32, 255).endVertex();
        Tessellator.draw();
        
        int x = this.left + this.width / 2 - this.getListWidth() / 2 + 2;
        int y = this.top + 4 - (int)this.amountScrolled;

        this.drawSelectionBox(x, y, mouseXIn, mouseYIn);
        GlState.disableDepth();
        
        this.overlayBackground(0, this.top, 255, 255);
        this.overlayBackground(this.bottom, this.height, 255, 255);
        
        GlState.enableBlend();
        GlState.tryBlendFuncSeparate(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA, GL11.GL_ZERO, GL11.GL_ONE);
        GlState.disableAlpha();
        GlState.shadeModel(GL11.GL_SMOOTH);
        GlState.disableTexture2D();
        
        int i1 = 4;
        worldrenderer.begin(7, DefaultVertexFormats.POSITION_TEX_COLOR);
        worldrenderer.pos((double)this.left, (double)(this.top + i1), 0.0D).tex(0.0D, 1.0D).color(0, 0, 0, 0).endVertex();
        worldrenderer.pos((double)this.right, (double)(this.top + i1), 0.0D).tex(1.0D, 1.0D).color(0, 0, 0, 0).endVertex();
        worldrenderer.pos((double)this.right, (double)this.top, 0.0D).tex(1.0D, 0.0D).color(0, 0, 0, 255).endVertex();
        worldrenderer.pos((double)this.left, (double)this.top, 0.0D).tex(0.0D, 0.0D).color(0, 0, 0, 255).endVertex();
        Tessellator.draw();
        worldrenderer.begin(7, DefaultVertexFormats.POSITION_TEX_COLOR);
        worldrenderer.pos((double)this.left, (double)this.bottom, 0.0D).tex(0.0D, 1.0D).color(0, 0, 0, 255).endVertex();
        worldrenderer.pos((double)this.right, (double)this.bottom, 0.0D).tex(1.0D, 1.0D).color(0, 0, 0, 255).endVertex();
        worldrenderer.pos((double)this.right, (double)(this.bottom - i1), 0.0D).tex(1.0D, 0.0D).color(0, 0, 0, 0).endVertex();
        worldrenderer.pos((double)this.left, (double)(this.bottom - i1), 0.0D).tex(0.0D, 0.0D).color(0, 0, 0, 0).endVertex();
        Tessellator.draw();
        
        int j1 = this.getMaxScroll();

        if (j1 > 0)
        {
            int k1 = (this.bottom - this.top) * (this.bottom - this.top) / this.getContentHeight();
            k1 = ExtMath.clampi(k1, 32, this.bottom - this.top - 8);
            int l1 = (int)this.amountScrolled * (this.bottom - this.top - k1) / j1 + this.top;

            if (l1 < this.top)
            {
                l1 = this.top;
            }

            worldrenderer.begin(7, DefaultVertexFormats.POSITION_TEX_COLOR);
            worldrenderer.pos((double)i, (double)this.bottom, 0.0D).tex(0.0D, 1.0D).color(0, 0, 0, 255).endVertex();
            worldrenderer.pos((double)j, (double)this.bottom, 0.0D).tex(1.0D, 1.0D).color(0, 0, 0, 255).endVertex();
            worldrenderer.pos((double)j, (double)this.top, 0.0D).tex(1.0D, 0.0D).color(0, 0, 0, 255).endVertex();
            worldrenderer.pos((double)i, (double)this.top, 0.0D).tex(0.0D, 0.0D).color(0, 0, 0, 255).endVertex();
            Tessellator.draw();
            worldrenderer.begin(7, DefaultVertexFormats.POSITION_TEX_COLOR);
            worldrenderer.pos((double)i, (double)(l1 + k1), 0.0D).tex(0.0D, 1.0D).color(128, 128, 128, 255).endVertex();
            worldrenderer.pos((double)j, (double)(l1 + k1), 0.0D).tex(1.0D, 1.0D).color(128, 128, 128, 255).endVertex();
            worldrenderer.pos((double)j, (double)l1, 0.0D).tex(1.0D, 0.0D).color(128, 128, 128, 255).endVertex();
            worldrenderer.pos((double)i, (double)l1, 0.0D).tex(0.0D, 0.0D).color(128, 128, 128, 255).endVertex();
            Tessellator.draw();
            worldrenderer.begin(7, DefaultVertexFormats.POSITION_TEX_COLOR);
            worldrenderer.pos((double)i, (double)(l1 + k1 - 1), 0.0D).tex(0.0D, 1.0D).color(192, 192, 192, 255).endVertex();
            worldrenderer.pos((double)(j - 1), (double)(l1 + k1 - 1), 0.0D).tex(1.0D, 1.0D).color(192, 192, 192, 255).endVertex();
            worldrenderer.pos((double)(j - 1), (double)l1, 0.0D).tex(1.0D, 0.0D).color(192, 192, 192, 255).endVertex();
            worldrenderer.pos((double)i, (double)l1, 0.0D).tex(0.0D, 0.0D).color(192, 192, 192, 255).endVertex();
            Tessellator.draw();
        }

        GlState.enableTexture2D();
        GlState.shadeModel(GL11.GL_FLAT);
        GlState.enableAlpha();
        GlState.disableBlend();
        
        super.draw();
    }

    public void handleMouseInput()
    {
        if (this.isMouseYWithinSlotBounds(this.mouseY))
        {
//            if (Button.MOUSE_LEFT.isDown() && this.getEnabled())
//            {
            if (this.initialClickY == -1)
            {
                boolean flag1 = true;

                if (this.mouseY >= this.top && this.mouseY <= this.bottom)
                {
                    int j2 = (this.width - this.getListWidth()) / 2;
                    int k2 = (this.width + this.getListWidth()) / 2;
                    int l2 = this.mouseY - this.top + (int)this.amountScrolled - 4;
                    int i1 = l2 / this.getSlotHeight();

                    if (i1 < this.getSize() && this.mouseX >= j2 && this.mouseX <= k2 && i1 >= 0 && l2 >= 0)
                    {
                    }
                    else if (this.mouseX >= j2 && this.mouseX <= k2 && l2 < 0)
                    {
                        flag1 = false;
                    }

                    int i3 = this.getScrollBarX();
                    int j1 = i3 + 6;

                    if (this.mouseX >= i3 && this.mouseX <= j1)
                    {
                        this.scrollMultiplier = -1.0F;
                        int k1 = this.getMaxScroll();

                        if (k1 < 1)
                        {
                            k1 = 1;
                        }

                        int l1 = (int)((float)((this.bottom - this.top) * (this.bottom - this.top)) / (float)this.getContentHeight());
                        l1 = ExtMath.clampi(l1, 32, this.bottom - this.top - 8);
                        this.scrollMultiplier /= (float)(this.bottom - this.top - l1) / (float)k1;
                    }
                    else
                    {
                        this.scrollMultiplier = 1.0F;
                    }

                    if (flag1)
                    {
                        this.initialClickY = this.mouseY;
                    }
                    else
                    {
                        this.initialClickY = -2;
                    }
                }
                else
                {
                    this.initialClickY = -2;
                }
            }
            else if (this.initialClickY >= 0)
            {
                this.amountScrolled -= (float)(this.mouseY - this.initialClickY) * this.scrollMultiplier;
                this.initialClickY = this.mouseY;
            }
//            }
//            else
//            {
//                this.initialClickY = -1;
//            }
        }
    }

    protected void drawSelectionBox(int x, int y, int mouseXIn, int mouseYIn)
    {
        int size = this.getSize();
        RenderBuffer rb = Tessellator.getBuffer();

        for (int z = 0; z < size; z++)
        {
            int y1 = y + z * this.getSlotHeight();
            int h = this.getSlotHeight() - 4;

            if (this.isSelected(z))
            {
                int x1 = this.left + (this.width / 2 - this.getListWidth() / 2);
                int x2 = this.left + this.width / 2 + this.getListWidth() / 2;
                GlState.color(1.0F, 1.0F, 1.0F, 1.0F);
                GlState.disableTexture2D();
                rb.begin(7, DefaultVertexFormats.POSITION_TEX_COLOR);
                rb.pos((double)x1, (double)(y1 + h + 2), 0.0D).tex(0.0D, 1.0D).color(128, 128, 128, 255).endVertex();
                rb.pos((double)x2, (double)(y1 + h + 2), 0.0D).tex(1.0D, 1.0D).color(128, 128, 128, 255).endVertex();
                rb.pos((double)x2, (double)(y1 - 2), 0.0D).tex(1.0D, 0.0D).color(128, 128, 128, 255).endVertex();
                rb.pos((double)x1, (double)(y1 - 2), 0.0D).tex(0.0D, 0.0D).color(128, 128, 128, 255).endVertex();
                rb.pos((double)(x1 + 1), (double)(y1 + h + 1), 0.0D).tex(0.0D, 1.0D).color(0, 0, 0, 255).endVertex();
                rb.pos((double)(x2 - 1), (double)(y1 + h + 1), 0.0D).tex(1.0D, 1.0D).color(0, 0, 0, 255).endVertex();
                rb.pos((double)(x2 - 1), (double)(y1 - 1), 0.0D).tex(1.0D, 0.0D).color(0, 0, 0, 255).endVertex();
                rb.pos((double)(x1 + 1), (double)(y1 - 1), 0.0D).tex(0.0D, 0.0D).color(0, 0, 0, 255).endVertex();
                Tessellator.draw();
                GlState.enableTexture2D();
            }

            boolean hover = this.getSlotIndexFromScreenCoords(mouseXIn, mouseYIn) == z;
            this.getListEntry(z).draw(x, y1, mouseXIn - x, mouseYIn - y1, hover);
            if(hover)
				Drawing.drawRect(x - 2, y1 - 2, this.getListWidth(), this.getSlotHeight(), this.gm.style.hover);
        }
    }

    protected void overlayBackground(int startY, int endY, int startAlpha, int endAlpha)
    {
        RenderBuffer rb = Tessellator.getBuffer();
        this.gm.getTextureManager().bindTexture(Gui.DIRT_BACKGROUND);
        GlState.color(1.0F, 1.0F, 1.0F, 1.0F);
        float f = 32.0F;
        rb.begin(7, DefaultVertexFormats.POSITION_TEX_COLOR);
        rb.pos((double)this.left, (double)endY, 0.0D).tex(0.0D, (double)((float)endY / 32.0F)).color(64, 64, 64, endAlpha).endVertex();
        rb.pos((double)(this.left + this.width), (double)endY, 0.0D).tex((double)((float)this.width / 32.0F), (double)((float)endY / 32.0F)).color(64, 64, 64, endAlpha).endVertex();
        rb.pos((double)(this.left + this.width), (double)startY, 0.0D).tex((double)((float)this.width / 32.0F), (double)((float)startY / 32.0F)).color(64, 64, 64, startAlpha).endVertex();
        rb.pos((double)this.left, (double)startY, 0.0D).tex(0.0D, (double)((float)startY / 32.0F)).color(64, 64, 64, startAlpha).endVertex();
        Tessellator.draw();
    }
    
    public void mouse(Button btn, int x, int y, boolean ctrl, boolean shift)
    {
    	super.mouse(btn, x, y, ctrl, shift);
        if (this.isMouseYWithinSlotBounds(y))
        {
            int i = this.getSlotIndexFromScreenCoords(x, y);

            if (i >= 0)
            {
                int j = this.left + this.width / 2 - this.getListWidth() / 2 + 2;
                int k = this.top + 4 - this.getAmountScrolled() + i * this.getSlotHeight();
                int l = x - j;
                int i1 = y - k;

                boolean flag = i == this.selectedElement && System.currentTimeMillis() - this.lastClicked < (long)this.gm.dclickDelay;
                this.selectedElement = i;
                this.lastClicked = System.currentTimeMillis();

                this.getListEntry(i).select(flag, l, i1);
            }
        }
        if(btn == Button.MOUSE_LEFT && this.clicked(x, y) == null)
        	this.handleMouseInput();
    }

	public void mouserel(Button btn, int x, int y) {
		super.mouserel(btn, x, y);
		if(btn == Button.MOUSE_LEFT)
            this.initialClickY = -1;
	}
    
    public void scroll(int scr_x, int scr_y, int x, int y, boolean ctrl, boolean shift) {
    	super.scroll(scr_x, scr_y, x, y, ctrl, shift);
    	if(scr_y != 0 && this.clicked(x, y) == null)
    		this.amountScrolled -= (float)(ExtMath.clampi(scr_y, -1, 1) * this.getSlotHeight() / 2);
    }

	public void drag(int x, int y) {
		super.drag(x, y);
		if(this.selected == null && Button.MOUSE_LEFT.isDown())
			this.handleMouseInput();
	}
}