    001    package cpw.mods.fml.client;
    002
    003    import java.util.List;
    004
    005    import net.minecraft.client.Minecraft;
    006    import net.minecraft.client.gui.GuiButton;
    007    import net.minecraft.client.renderer.Tessellator;
    008
    009    import org.lwjgl.input.Mouse;
    010    import org.lwjgl.opengl.GL11;
    011
    012    public abstract class GuiScrollingList
    013    {
    014        private final Minecraft client;
    015        protected final int listWidth;
    016        protected final int listHeight;
    017        protected final int top;
    018        protected final int bottom;
    019        private final int right;
    020        protected final int left;
    021        protected final int slotHeight;
    022        private int scrollUpActionId;
    023        private int scrollDownActionId;
    024        protected int mouseX;
    025        protected int mouseY;
    026        private float initialMouseClickY = -2.0F;
    027        private float scrollFactor;
    028        private float scrollDistance;
    029        private int selectedIndex = -1;
    030        private long lastClickTime = 0L;
    031        private boolean field_25123_p = true;
    032        private boolean field_27262_q;
    033        private int field_27261_r;
    034
    035        public GuiScrollingList(Minecraft client, int width, int height, int top, int bottom, int left, int entryHeight)
    036        {
    037            this.client = client;
    038            this.listWidth = width;
    039            this.listHeight = height;
    040            this.top = top;
    041            this.bottom = bottom;
    042            this.slotHeight = entryHeight;
    043            this.left = left;
    044            this.right = width + this.left;
    045        }
    046
    047        public void func_27258_a(boolean p_27258_1_)
    048        {
    049            this.field_25123_p = p_27258_1_;
    050        }
    051
    052        protected void func_27259_a(boolean p_27259_1_, int p_27259_2_)
    053        {
    054            this.field_27262_q = p_27259_1_;
    055            this.field_27261_r = p_27259_2_;
    056
    057            if (!p_27259_1_)
    058            {
    059                this.field_27261_r = 0;
    060            }
    061        }
    062
    063        protected abstract int getSize();
    064
    065        protected abstract void elementClicked(int index, boolean doubleClick);
    066
    067        protected abstract boolean isSelected(int index);
    068
    069        protected int getContentHeight()
    070        {
    071            return this.getSize() * this.slotHeight + this.field_27261_r;
    072        }
    073
    074        protected abstract void drawBackground();
    075
    076        protected abstract void drawSlot(int var1, int var2, int var3, int var4, Tessellator var5);
    077
    078        protected void func_27260_a(int p_27260_1_, int p_27260_2_, Tessellator p_27260_3_) {}
    079
    080        protected void func_27255_a(int p_27255_1_, int p_27255_2_) {}
    081
    082        protected void func_27257_b(int p_27257_1_, int p_27257_2_) {}
    083
    084        public int func_27256_c(int p_27256_1_, int p_27256_2_)
    085
    086        {
    087            int var3 = this.left + 1;
    088            int var4 = this.left + this.listWidth - 7;
    089            int var5 = p_27256_2_ - this.top - this.field_27261_r + (int)this.scrollDistance - 4;
    090            int var6 = var5 / this.slotHeight;
    091            return p_27256_1_ >= var3 && p_27256_1_ <= var4 && var6 >= 0 && var5 >= 0 && var6 < this.getSize() ? var6 : -1;
    092        }
    093
    094        public void registerScrollButtons(List p_22240_1_, int p_22240_2_, int p_22240_3_)
    095        {
    096            this.scrollUpActionId = p_22240_2_;
    097            this.scrollDownActionId = p_22240_3_;
    098        }
    099
    100        private void applyScrollLimits()
    101        {
    102            int var1 = this.getContentHeight() - (this.bottom - this.top - 4);
    103
    104            if (var1 < 0)
    105            {
    106                var1 /= 2;
    107            }
    108
    109            if (this.scrollDistance < 0.0F)
    110            {
    111                this.scrollDistance = 0.0F;
    112            }
    113
    114            if (this.scrollDistance > (float)var1)
    115            {
    116                this.scrollDistance = (float)var1;
    117            }
    118        }
    119
    120        public void actionPerformed(GuiButton button)
    121        {
    122            if (button.enabled)
    123            {
    124                if (button.id == this.scrollUpActionId)
    125                {
    126                    this.scrollDistance -= (float)(this.slotHeight * 2 / 3);
    127                    this.initialMouseClickY = -2.0F;
    128                    this.applyScrollLimits();
    129                }
    130                else if (button.id == this.scrollDownActionId)
    131                {
    132                    this.scrollDistance += (float)(this.slotHeight * 2 / 3);
    133                    this.initialMouseClickY = -2.0F;
    134                    this.applyScrollLimits();
    135                }
    136            }
    137        }
    138
    139        public void drawScreen(int mouseX, int mouseY, float p_22243_3_)
    140        {
    141            this.mouseX = mouseX;
    142            this.mouseY = mouseY;
    143            this.drawBackground();
    144            int listLength = this.getSize();
    145            int scrollBarXStart = this.left + this.listWidth - 6;
    146            int scrollBarXEnd = scrollBarXStart + 6;
    147            int boxLeft = this.left;
    148            int boxRight = scrollBarXStart-1;
    149            int var10;
    150            int var11;
    151            int var13;
    152            int var19;
    153
    154            if (Mouse.isButtonDown(0))
    155            {
    156                if (this.initialMouseClickY == -1.0F)
    157                {
    158                    boolean var7 = true;
    159
    160                    if (mouseY >= this.top && mouseY <= this.bottom)
    161                    {
    162                        var10 = mouseY - this.top - this.field_27261_r + (int)this.scrollDistance - 4;
    163                        var11 = var10 / this.slotHeight;
    164
    165                        if (mouseX >= boxLeft && mouseX <= boxRight && var11 >= 0 && var10 >= 0 && var11 < listLength)
    166                        {
    167                            boolean var12 = var11 == this.selectedIndex && System.currentTimeMillis() - this.lastClickTime < 250L;
    168                            this.elementClicked(var11, var12);
    169                            this.selectedIndex = var11;
    170                            this.lastClickTime = System.currentTimeMillis();
    171                        }
    172                        else if (mouseX >= boxLeft && mouseX <= boxRight && var10 < 0)
    173                        {
    174                            this.func_27255_a(mouseX - boxLeft, mouseY - this.top + (int)this.scrollDistance - 4);
    175                            var7 = false;
    176                        }
    177
    178                        if (mouseX >= scrollBarXStart && mouseX <= scrollBarXEnd)
    179                        {
    180                            this.scrollFactor = -1.0F;
    181                            var19 = this.getContentHeight() - (this.bottom - this.top - 4);
    182
    183                            if (var19 < 1)
    184                            {
    185                                var19 = 1;
    186                            }
    187
    188                            var13 = (int)((float)((this.bottom - this.top) * (this.bottom - this.top)) / (float)this.getContentHeight());
    189
    190                            if (var13 < 32)
    191                            {
    192                                var13 = 32;
    193                            }
    194
    195                            if (var13 > this.bottom - this.top - 8)
    196                            {
    197                                var13 = this.bottom - this.top - 8;
    198                            }
    199
    200                            this.scrollFactor /= (float)(this.bottom - this.top - var13) / (float)var19;
    201                        }
    202                        else
    203                        {
    204                            this.scrollFactor = 1.0F;
    205                        }
    206
    207                        if (var7)
    208                        {
    209                            this.initialMouseClickY = (float)mouseY;
    210                        }
    211                        else
    212                        {
    213                            this.initialMouseClickY = -2.0F;
    214                        }
    215                    }
    216                    else
    217                    {
    218                        this.initialMouseClickY = -2.0F;
    219                    }
    220                }
    221                else if (this.initialMouseClickY >= 0.0F)
    222                {
    223                    this.scrollDistance -= ((float)mouseY - this.initialMouseClickY) * this.scrollFactor;
    224                    this.initialMouseClickY = (float)mouseY;
    225                }
    226            }
    227            else
    228            {
    229                while (Mouse.next())
    230                {
    231                    int var16 = Mouse.getEventDWheel();
    232
    233                    if (var16 != 0)
    234                    {
    235                        if (var16 > 0)
    236                        {
    237                            var16 = -1;
    238                        }
    239                        else if (var16 < 0)
    240                        {
    241                            var16 = 1;
    242                        }
    243
    244                        this.scrollDistance += (float)(var16 * this.slotHeight / 2);
    245                    }
    246                }
    247
    248                this.initialMouseClickY = -1.0F;
    249            }
    250
    251            this.applyScrollLimits();
    252            GL11.glDisable(GL11.GL_LIGHTING);
    253            GL11.glDisable(GL11.GL_FOG);
    254            Tessellator var18 = Tessellator.instance;
    255            GL11.glBindTexture(GL11.GL_TEXTURE_2D, this.client.renderEngine.getTexture("/gui/background.png"));
    256            GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
    257            float var17 = 32.0F;
    258            var18.startDrawingQuads();
    259            var18.setColorOpaque_I(2105376);
    260            var18.addVertexWithUV((double)this.left, (double)this.bottom, 0.0D, (double)((float)this.left / var17), (double)((float)(this.bottom + (int)this.scrollDistance) / var17));
    261            var18.addVertexWithUV((double)this.right, (double)this.bottom, 0.0D, (double)((float)this.right / var17), (double)((float)(this.bottom + (int)this.scrollDistance) / var17));
    262            var18.addVertexWithUV((double)this.right, (double)this.top, 0.0D, (double)((float)this.right / var17), (double)((float)(this.top + (int)this.scrollDistance) / var17));
    263            var18.addVertexWithUV((double)this.left, (double)this.top, 0.0D, (double)((float)this.left / var17), (double)((float)(this.top + (int)this.scrollDistance) / var17));
    264            var18.draw();
    265    //        boxRight = this.listWidth / 2 - 92 - 16;
    266            var10 = this.top + 4 - (int)this.scrollDistance;
    267
    268            if (this.field_27262_q)
    269            {
    270                this.func_27260_a(boxRight, var10, var18);
    271            }
    272
    273            int var14;
    274
    275            for (var11 = 0; var11 < listLength; ++var11)
    276            {
    277                var19 = var10 + var11 * this.slotHeight + this.field_27261_r;
    278                var13 = this.slotHeight - 4;
    279
    280                if (var19 <= this.bottom && var19 + var13 >= this.top)
    281                {
    282                    if (this.field_25123_p && this.isSelected(var11))
    283                    {
    284                        var14 = boxLeft;
    285                        int var15 = boxRight;
    286                        GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
    287                        GL11.glDisable(GL11.GL_TEXTURE_2D);
    288                        var18.startDrawingQuads();
    289                        var18.setColorOpaque_I(8421504);
    290                        var18.addVertexWithUV((double)var14, (double)(var19 + var13 + 2), 0.0D, 0.0D, 1.0D);
    291                        var18.addVertexWithUV((double)var15, (double)(var19 + var13 + 2), 0.0D, 1.0D, 1.0D);
    292                        var18.addVertexWithUV((double)var15, (double)(var19 - 2), 0.0D, 1.0D, 0.0D);
    293                        var18.addVertexWithUV((double)var14, (double)(var19 - 2), 0.0D, 0.0D, 0.0D);
    294                        var18.setColorOpaque_I(0);
    295                        var18.addVertexWithUV((double)(var14 + 1), (double)(var19 + var13 + 1), 0.0D, 0.0D, 1.0D);
    296                        var18.addVertexWithUV((double)(var15 - 1), (double)(var19 + var13 + 1), 0.0D, 1.0D, 1.0D);
    297                        var18.addVertexWithUV((double)(var15 - 1), (double)(var19 - 1), 0.0D, 1.0D, 0.0D);
    298                        var18.addVertexWithUV((double)(var14 + 1), (double)(var19 - 1), 0.0D, 0.0D, 0.0D);
    299                        var18.draw();
    300                        GL11.glEnable(GL11.GL_TEXTURE_2D);
    301                    }
    302
    303                    this.drawSlot(var11, boxRight, var19, var13, var18);
    304                }
    305            }
    306
    307            GL11.glDisable(GL11.GL_DEPTH_TEST);
    308            byte var20 = 4;
    309            this.overlayBackground(0, this.top, 255, 255);
    310            this.overlayBackground(this.bottom, this.listHeight, 255, 255);
    311            GL11.glEnable(GL11.GL_BLEND);
    312            GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
    313            GL11.glDisable(GL11.GL_ALPHA_TEST);
    314            GL11.glShadeModel(GL11.GL_SMOOTH);
    315            GL11.glDisable(GL11.GL_TEXTURE_2D);
    316            var18.startDrawingQuads();
    317            var18.setColorRGBA_I(0, 0);
    318            var18.addVertexWithUV((double)this.left, (double)(this.top + var20), 0.0D, 0.0D, 1.0D);
    319            var18.addVertexWithUV((double)this.right, (double)(this.top + var20), 0.0D, 1.0D, 1.0D);
    320            var18.setColorRGBA_I(0, 255);
    321            var18.addVertexWithUV((double)this.right, (double)this.top, 0.0D, 1.0D, 0.0D);
    322            var18.addVertexWithUV((double)this.left, (double)this.top, 0.0D, 0.0D, 0.0D);
    323            var18.draw();
    324            var18.startDrawingQuads();
    325            var18.setColorRGBA_I(0, 255);
    326            var18.addVertexWithUV((double)this.left, (double)this.bottom, 0.0D, 0.0D, 1.0D);
    327            var18.addVertexWithUV((double)this.right, (double)this.bottom, 0.0D, 1.0D, 1.0D);
    328            var18.setColorRGBA_I(0, 0);
    329            var18.addVertexWithUV((double)this.right, (double)(this.bottom - var20), 0.0D, 1.0D, 0.0D);
    330            var18.addVertexWithUV((double)this.left, (double)(this.bottom - var20), 0.0D, 0.0D, 0.0D);
    331            var18.draw();
    332            var19 = this.getContentHeight() - (this.bottom - this.top - 4);
    333
    334            if (var19 > 0)
    335            {
    336                var13 = (this.bottom - this.top) * (this.bottom - this.top) / this.getContentHeight();
    337
    338                if (var13 < 32)
    339                {
    340                    var13 = 32;
    341                }
    342
    343                if (var13 > this.bottom - this.top - 8)
    344                {
    345                    var13 = this.bottom - this.top - 8;
    346                }
    347
    348                var14 = (int)this.scrollDistance * (this.bottom - this.top - var13) / var19 + this.top;
    349
    350                if (var14 < this.top)
    351                {
    352                    var14 = this.top;
    353                }
    354
    355                var18.startDrawingQuads();
    356                var18.setColorRGBA_I(0, 255);
    357                var18.addVertexWithUV((double)scrollBarXStart, (double)this.bottom, 0.0D, 0.0D, 1.0D);
    358                var18.addVertexWithUV((double)scrollBarXEnd, (double)this.bottom, 0.0D, 1.0D, 1.0D);
    359                var18.addVertexWithUV((double)scrollBarXEnd, (double)this.top, 0.0D, 1.0D, 0.0D);
    360                var18.addVertexWithUV((double)scrollBarXStart, (double)this.top, 0.0D, 0.0D, 0.0D);
    361                var18.draw();
    362                var18.startDrawingQuads();
    363                var18.setColorRGBA_I(8421504, 255);
    364                var18.addVertexWithUV((double)scrollBarXStart, (double)(var14 + var13), 0.0D, 0.0D, 1.0D);
    365                var18.addVertexWithUV((double)scrollBarXEnd, (double)(var14 + var13), 0.0D, 1.0D, 1.0D);
    366                var18.addVertexWithUV((double)scrollBarXEnd, (double)var14, 0.0D, 1.0D, 0.0D);
    367                var18.addVertexWithUV((double)scrollBarXStart, (double)var14, 0.0D, 0.0D, 0.0D);
    368                var18.draw();
    369                var18.startDrawingQuads();
    370                var18.setColorRGBA_I(12632256, 255);
    371                var18.addVertexWithUV((double)scrollBarXStart, (double)(var14 + var13 - 1), 0.0D, 0.0D, 1.0D);
    372                var18.addVertexWithUV((double)(scrollBarXEnd - 1), (double)(var14 + var13 - 1), 0.0D, 1.0D, 1.0D);
    373                var18.addVertexWithUV((double)(scrollBarXEnd - 1), (double)var14, 0.0D, 1.0D, 0.0D);
    374                var18.addVertexWithUV((double)scrollBarXStart, (double)var14, 0.0D, 0.0D, 0.0D);
    375                var18.draw();
    376            }
    377
    378            this.func_27257_b(mouseX, mouseY);
    379            GL11.glEnable(GL11.GL_TEXTURE_2D);
    380            GL11.glShadeModel(GL11.GL_FLAT);
    381            GL11.glEnable(GL11.GL_ALPHA_TEST);
    382            GL11.glDisable(GL11.GL_BLEND);
    383        }
    384
    385        private void overlayBackground(int p_22239_1_, int p_22239_2_, int p_22239_3_, int p_22239_4_)
    386        {
    387            Tessellator var5 = Tessellator.instance;
    388            GL11.glBindTexture(GL11.GL_TEXTURE_2D, this.client.renderEngine.getTexture("/gui/background.png"));
    389            GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
    390            float var6 = 32.0F;
    391            var5.startDrawingQuads();
    392            var5.setColorRGBA_I(4210752, p_22239_4_);
    393            var5.addVertexWithUV(0.0D, (double)p_22239_2_, 0.0D, 0.0D, (double)((float)p_22239_2_ / var6));
    394            var5.addVertexWithUV((double)this.listWidth + 30, (double)p_22239_2_, 0.0D, (double)((float)(this.listWidth + 30) / var6), (double)((float)p_22239_2_ / var6));
    395            var5.setColorRGBA_I(4210752, p_22239_3_);
    396            var5.addVertexWithUV((double)this.listWidth + 30, (double)p_22239_1_, 0.0D, (double)((float)(this.listWidth + 30) / var6), (double)((float)p_22239_1_ / var6));
    397            var5.addVertexWithUV(0.0D, (double)p_22239_1_, 0.0D, 0.0D, (double)((float)p_22239_1_ / var6));
    398            var5.draw();
    399        }
    400    }