Java tutorial
/* Ziah_'s Client Copyright (C) 2013 Ziah Jyothi This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see [http://www.gnu.org/licenses/]. */ package com.oneofthesevenbillion.ziah.ZiahsClient.gui; import java.util.List; import net.minecraft.src.Gui; import net.minecraft.src.GuiButton; import net.minecraft.src.Minecraft; import net.minecraft.src.ModLoader; import net.minecraft.src.Tessellator; import net.minecraft.src.TextureManager; import org.lwjgl.input.Mouse; import org.lwjgl.opengl.GL11; public abstract class GuiScrollingList { private final Minecraft client; protected final int listWidth; protected final int listHeight; protected final int top; protected final int bottom; private final int right; protected final int left; protected final int slotHeight; private int scrollUpActionId; private int scrollDownActionId; protected int mouseX; protected int mouseY; private float initialMouseClickY = -2.0F; private float scrollFactor; private float scrollDistance; private int selectedIndex = -1; private long lastClickTime = 0L; private boolean field_25123_p = true; private boolean field_27262_q; private int field_27261_r; public GuiScrollingList(Minecraft client, int width, int height, int top, int bottom, int left, int entryHeight) { this.client = client; this.listWidth = width; this.listHeight = height; this.top = top; this.bottom = bottom; this.slotHeight = entryHeight; this.left = left; this.right = width + this.left; } public void func_27258_a(boolean p_27258_1_) { this.field_25123_p = p_27258_1_; } protected void func_27259_a(boolean p_27259_1_, int p_27259_2_) { this.field_27262_q = p_27259_1_; this.field_27261_r = p_27259_2_; if (!p_27259_1_) { this.field_27261_r = 0; } } protected abstract int getSize(); protected abstract void elementClicked(int index, boolean doubleClick); protected abstract boolean isSelected(int index); protected int getContentHeight() { return this.getSize() * this.slotHeight + this.field_27261_r; } protected abstract void drawBackground(); protected abstract void drawSlot(int var1, int var2, int var3, int var4, Tessellator var5); protected void func_27260_a(int p_27260_1_, int p_27260_2_, Tessellator p_27260_3_) { } protected void func_27255_a(int p_27255_1_, int p_27255_2_) { } protected void func_27257_b(int p_27257_1_, int p_27257_2_) { } public int func_27256_c(int p_27256_1_, int p_27256_2_) { int var3 = this.left + 1; int var4 = this.left + this.listWidth - 7; int var5 = p_27256_2_ - this.top - this.field_27261_r + (int) this.scrollDistance - 4; int var6 = var5 / this.slotHeight; return p_27256_1_ >= var3 && p_27256_1_ <= var4 && var6 >= 0 && var5 >= 0 && var6 < this.getSize() ? var6 : -1; } public void registerScrollButtons(List p_22240_1_, int p_22240_2_, int p_22240_3_) { this.scrollUpActionId = p_22240_2_; this.scrollDownActionId = p_22240_3_; } private void applyScrollLimits() { int var1 = this.getContentHeight() - (this.bottom - this.top - 4); if (var1 < 0) { var1 /= 2; } if (this.scrollDistance < 0.0F) { this.scrollDistance = 0.0F; } if (this.scrollDistance > var1) { this.scrollDistance = var1; } } public void actionPerformed(GuiButton button) { if (button.enabled) { if (button.id == this.scrollUpActionId) { this.scrollDistance -= this.slotHeight * 2 / 3; this.initialMouseClickY = -2.0F; this.applyScrollLimits(); } else if (button.id == this.scrollDownActionId) { this.scrollDistance += this.slotHeight * 2 / 3; this.initialMouseClickY = -2.0F; this.applyScrollLimits(); } } } public void drawScreen(int mouseX, int mouseY, float tick) { this.mouseX = mouseX; this.mouseY = mouseY; this.drawBackground(); int listLength = this.getSize(); int scrollBarXStart = this.left + this.listWidth - 6; int scrollBarXEnd = scrollBarXStart + 6; int boxLeft = this.left; int boxRight = scrollBarXStart - 1; int var10; int var11; int var13; int var19; if (Mouse.isButtonDown(0)) { if (this.initialMouseClickY == -1.0F) { boolean var7 = true; if (mouseY >= this.top && mouseY <= this.bottom) { var10 = mouseY - this.top - this.field_27261_r + (int) this.scrollDistance - 4; var11 = var10 / this.slotHeight; if (mouseX >= boxLeft && mouseX <= boxRight && var11 >= 0 && var10 >= 0 && var11 < listLength) { boolean var12 = var11 == this.selectedIndex && System.currentTimeMillis() - this.lastClickTime < 250L; this.elementClicked(var11, var12); this.selectedIndex = var11; this.lastClickTime = System.currentTimeMillis(); } else if (mouseX >= boxLeft && mouseX <= boxRight && var10 < 0) { this.func_27255_a(mouseX - boxLeft, mouseY - this.top + (int) this.scrollDistance - 4); var7 = false; } if (mouseX >= scrollBarXStart && mouseX <= scrollBarXEnd) { this.scrollFactor = -1.0F; var19 = this.getContentHeight() - (this.bottom - this.top - 4); if (var19 < 1) { var19 = 1; } var13 = (int) ((float) ((this.bottom - this.top) * (this.bottom - this.top)) / (float) this.getContentHeight()); if (var13 < 32) { var13 = 32; } if (var13 > this.bottom - this.top - 8) { var13 = this.bottom - this.top - 8; } this.scrollFactor /= (float) (this.bottom - this.top - var13) / (float) var19; } else { this.scrollFactor = 1.0F; } if (var7) { this.initialMouseClickY = mouseY; } else { this.initialMouseClickY = -2.0F; } } else { this.initialMouseClickY = -2.0F; } } else if (this.initialMouseClickY >= 0.0F) { this.scrollDistance -= (mouseY - this.initialMouseClickY) * this.scrollFactor; this.initialMouseClickY = mouseY; } } else { while (Mouse.next()) { int var16 = Mouse.getEventDWheel(); if (var16 != 0) { if (var16 > 0) { var16 = -1; } else if (var16 < 0) { var16 = 1; } this.scrollDistance += var16 * this.slotHeight / 2; } } this.initialMouseClickY = -1.0F; } this.applyScrollLimits(); GL11.glDisable(GL11.GL_LIGHTING); GL11.glDisable(GL11.GL_FOG); Tessellator var18 = Tessellator.instance; try { ((TextureManager) ModLoader.getPrivateValue(Minecraft.class, this.client, 7)) .func_110577_a(Gui.field_110325_k); } catch (Exception e) { e.printStackTrace(); } GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F); float var17 = 32.0F; var18.startDrawingQuads(); var18.setColorOpaque_I(2105376); var18.addVertexWithUV(this.left, this.bottom, 0.0D, this.left / var17, (this.bottom + (int) this.scrollDistance) / var17); var18.addVertexWithUV(this.right, this.bottom, 0.0D, this.right / var17, (this.bottom + (int) this.scrollDistance) / var17); var18.addVertexWithUV(this.right, this.top, 0.0D, this.right / var17, (this.top + (int) this.scrollDistance) / var17); var18.addVertexWithUV(this.left, this.top, 0.0D, this.left / var17, (this.top + (int) this.scrollDistance) / var17); var18.draw(); // boxRight = this.listWidth / 2 - 92 - 16; var10 = this.top + 4 - (int) this.scrollDistance; if (this.field_27262_q) { this.func_27260_a(boxRight, var10, var18); } int var14; for (var11 = 0; var11 < listLength; ++var11) { var19 = var10 + var11 * this.slotHeight + this.field_27261_r; var13 = this.slotHeight - 4; if (var19 <= this.bottom && var19 + var13 >= this.top) { if (this.field_25123_p && this.isSelected(var11)) { var14 = boxLeft; int var15 = boxRight; GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F); GL11.glDisable(GL11.GL_TEXTURE_2D); var18.startDrawingQuads(); var18.setColorOpaque_I(8421504); var18.addVertexWithUV(var14, var19 + var13 + 2, 0.0D, 0.0D, 1.0D); var18.addVertexWithUV(var15, var19 + var13 + 2, 0.0D, 1.0D, 1.0D); var18.addVertexWithUV(var15, var19 - 2, 0.0D, 1.0D, 0.0D); var18.addVertexWithUV(var14, var19 - 2, 0.0D, 0.0D, 0.0D); var18.setColorOpaque_I(0); var18.addVertexWithUV(var14 + 1, var19 + var13 + 1, 0.0D, 0.0D, 1.0D); var18.addVertexWithUV(var15 - 1, var19 + var13 + 1, 0.0D, 1.0D, 1.0D); var18.addVertexWithUV(var15 - 1, var19 - 1, 0.0D, 1.0D, 0.0D); var18.addVertexWithUV(var14 + 1, var19 - 1, 0.0D, 0.0D, 0.0D); var18.draw(); GL11.glEnable(GL11.GL_TEXTURE_2D); } this.drawSlot(var11, boxRight, var19, var13, var18); } } GL11.glDisable(GL11.GL_DEPTH_TEST); byte var20 = 4; this.overlayBackground(0, this.top, 255, 255); this.overlayBackground(this.bottom, this.listHeight, 255, 255); GL11.glEnable(GL11.GL_BLEND); GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA); GL11.glDisable(GL11.GL_ALPHA_TEST); GL11.glShadeModel(GL11.GL_SMOOTH); GL11.glDisable(GL11.GL_TEXTURE_2D); var18.startDrawingQuads(); var18.setColorRGBA_I(0, 0); var18.addVertexWithUV(this.left, this.top + var20, 0.0D, 0.0D, 1.0D); var18.addVertexWithUV(this.right, this.top + var20, 0.0D, 1.0D, 1.0D); var18.setColorRGBA_I(0, 255); var18.addVertexWithUV(this.right, this.top, 0.0D, 1.0D, 0.0D); var18.addVertexWithUV(this.left, this.top, 0.0D, 0.0D, 0.0D); var18.draw(); var18.startDrawingQuads(); var18.setColorRGBA_I(0, 255); var18.addVertexWithUV(this.left, this.bottom, 0.0D, 0.0D, 1.0D); var18.addVertexWithUV(this.right, this.bottom, 0.0D, 1.0D, 1.0D); var18.setColorRGBA_I(0, 0); var18.addVertexWithUV(this.right, this.bottom - var20, 0.0D, 1.0D, 0.0D); var18.addVertexWithUV(this.left, this.bottom - var20, 0.0D, 0.0D, 0.0D); var18.draw(); var19 = this.getContentHeight() - (this.bottom - this.top - 4); if (var19 > 0) { var13 = (this.bottom - this.top) * (this.bottom - this.top) / this.getContentHeight(); if (var13 < 32) { var13 = 32; } if (var13 > this.bottom - this.top - 8) { var13 = this.bottom - this.top - 8; } var14 = (int) this.scrollDistance * (this.bottom - this.top - var13) / var19 + this.top; if (var14 < this.top) { var14 = this.top; } var18.startDrawingQuads(); var18.setColorRGBA_I(0, 255); var18.addVertexWithUV(scrollBarXStart, this.bottom, 0.0D, 0.0D, 1.0D); var18.addVertexWithUV(scrollBarXEnd, this.bottom, 0.0D, 1.0D, 1.0D); var18.addVertexWithUV(scrollBarXEnd, this.top, 0.0D, 1.0D, 0.0D); var18.addVertexWithUV(scrollBarXStart, this.top, 0.0D, 0.0D, 0.0D); var18.draw(); var18.startDrawingQuads(); var18.setColorRGBA_I(8421504, 255); var18.addVertexWithUV(scrollBarXStart, var14 + var13, 0.0D, 0.0D, 1.0D); var18.addVertexWithUV(scrollBarXEnd, var14 + var13, 0.0D, 1.0D, 1.0D); var18.addVertexWithUV(scrollBarXEnd, var14, 0.0D, 1.0D, 0.0D); var18.addVertexWithUV(scrollBarXStart, var14, 0.0D, 0.0D, 0.0D); var18.draw(); var18.startDrawingQuads(); var18.setColorRGBA_I(12632256, 255); var18.addVertexWithUV(scrollBarXStart, var14 + var13 - 1, 0.0D, 0.0D, 1.0D); var18.addVertexWithUV(scrollBarXEnd - 1, var14 + var13 - 1, 0.0D, 1.0D, 1.0D); var18.addVertexWithUV(scrollBarXEnd - 1, var14, 0.0D, 1.0D, 0.0D); var18.addVertexWithUV(scrollBarXStart, var14, 0.0D, 0.0D, 0.0D); var18.draw(); } this.func_27257_b(mouseX, mouseY); GL11.glEnable(GL11.GL_TEXTURE_2D); GL11.glShadeModel(GL11.GL_FLAT); GL11.glEnable(GL11.GL_ALPHA_TEST); GL11.glDisable(GL11.GL_BLEND); } private void overlayBackground(int p_22239_1_, int p_22239_2_, int p_22239_3_, int p_22239_4_) { Tessellator var5 = Tessellator.instance; try { ((TextureManager) ModLoader.getPrivateValue(Minecraft.class, this.client, 7)) .func_110577_a(Gui.field_110325_k); } catch (Exception e) { e.printStackTrace(); } GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F); float var6 = 32.0F; var5.startDrawingQuads(); var5.setColorRGBA_I(4210752, p_22239_4_); var5.addVertexWithUV(0.0D, p_22239_2_, 0.0D, 0.0D, p_22239_2_ / var6); var5.addVertexWithUV((double) this.listWidth + 30, p_22239_2_, 0.0D, (this.listWidth + 30) / var6, p_22239_2_ / var6); var5.setColorRGBA_I(4210752, p_22239_3_); var5.addVertexWithUV((double) this.listWidth + 30, p_22239_1_, 0.0D, (this.listWidth + 30) / var6, p_22239_1_ / var6); var5.addVertexWithUV(0.0D, p_22239_1_, 0.0D, 0.0D, p_22239_1_ / var6); var5.draw(); } }