From b691c43c44ff180d10e7d4a9afc83b98551ff586 Mon Sep 17 00:00:00 2001
From: daoge_cmd <3523206925@qq.com>
Date: Sun, 1 Mar 2026 12:16:08 +0800
Subject: Initial commit

---
 Minecraft.Client/ScrolledSelectionList.cpp | 358 +++++++++++++++++++++++++++++
 1 file changed, 358 insertions(+)
 create mode 100644 Minecraft.Client/ScrolledSelectionList.cpp

(limited to 'Minecraft.Client/ScrolledSelectionList.cpp')

diff --git a/Minecraft.Client/ScrolledSelectionList.cpp b/Minecraft.Client/ScrolledSelectionList.cpp
new file mode 100644
index 00000000..9b7367ce
--- /dev/null
+++ b/Minecraft.Client/ScrolledSelectionList.cpp
@@ -0,0 +1,358 @@
+#include "stdafx.h"
+#include "ScrolledSelectionList.h"
+#include "Button.h"
+#include "Tesselator.h"
+#include "Textures.h"
+#include "..\Minecraft.World\System.h"
+
+ScrolledSelectionList::ScrolledSelectionList(Minecraft *minecraft, int width, int height, int y0, int y1, int itemHeight)
+{
+	this->minecraft = minecraft;
+	this->width = width;
+	this->height = height;
+	this->y0 = y0;
+	this->y1 = y1;
+	this->itemHeight = itemHeight;
+	this->x0 = 0;
+	this->x1 = width;
+
+
+	// 4J Stu - Smoe default initialisers
+	upId = 0;
+    downId = 0;
+
+    yDrag = 0.0f;
+    yDragScale = 0.0f;
+    yo = 0.0f;
+
+    lastSelection = 0;
+    lastSelectionTime = 0;
+
+    renderSelection = false;
+    _renderHeader = false;
+    headerHeight = 0;
+	//End
+}
+
+void ScrolledSelectionList::setRenderSelection(bool renderSelection)
+{
+	this->renderSelection = renderSelection;
+}
+
+void ScrolledSelectionList::setRenderHeader(bool renderHeader, int headerHeight)
+{
+    this->_renderHeader = renderHeader;
+    this->headerHeight = headerHeight;
+
+    if (!_renderHeader)
+	{
+        this->headerHeight = 0;
+    }
+}
+
+int ScrolledSelectionList::getMaxPosition()
+{
+	return getNumberOfItems() * itemHeight + headerHeight;
+}
+
+void ScrolledSelectionList::renderHeader(int x, int y, Tesselator *t)
+{
+}
+
+void ScrolledSelectionList::clickedHeader(int headerMouseX, int headerMouseY)
+{
+}
+
+void ScrolledSelectionList::renderDecorations(int mouseX, int mouseY)
+{
+}
+
+ int ScrolledSelectionList::getItemAtPosition(int x, int y)
+{
+    int x0 = width / 2 - (92 + 16 + 2);
+    int x1 = width / 2 + (92 + 16 + 2);
+
+    int clickSlotPos = (y - y0 - headerHeight + (int) yo - 4);
+    int slot = clickSlotPos / itemHeight;
+    if (x >= x0 && x <= x1 && slot >= 0 && clickSlotPos >= 0 && slot < getNumberOfItems())
+	{
+        return slot;
+    }
+    return -1;
+}
+
+void ScrolledSelectionList::init(vector<Button *> *buttons, int upButtonId, int downButtonId)
+{
+    this->upId = upButtonId;
+    this->downId = downButtonId;
+}
+
+void ScrolledSelectionList::capYPosition()
+{
+    int max = getMaxPosition() - (y1 - y0 - 4);
+    if (max < 0) max /= 2;
+    if (yo < 0) yo = 0;
+    if (yo > max) yo = (float)max;
+}
+
+void ScrolledSelectionList::buttonClicked(Button *button)
+{
+    if (!button->active) return;
+
+    if (button->id == upId)
+	{
+        yo -= (itemHeight * 2) / 3;
+        yDrag = DRAG_OUTSIDE;
+        capYPosition();
+    } else if (button->id == downId)
+	{
+        yo += (itemHeight * 2) / 3;
+        yDrag = DRAG_OUTSIDE;
+        capYPosition();
+    }
+}
+
+void ScrolledSelectionList::render(int xm, int ym, float a)
+{
+	// 4J Unused
+#if 0
+    renderBackground();
+
+    int itemCount = getNumberOfItems();
+
+    int xx0 = width / 2 + 124;
+    int xx1 = xx0 + 6;
+
+    if (Mouse::isButtonDown(0))
+	{
+        if (yDrag == NO_DRAG)
+		{
+            bool doDrag = true;
+            if (ym >= y0 && ym <= y1)
+			{
+                int x0 = width / 2 - (92 + 16 + 2);
+                int x1 = width / 2 + (92 + 16 + 2);
+
+                int clickSlotPos = (ym - y0 - headerHeight + (int) yo - 4);
+                int slot = clickSlotPos / itemHeight;
+                if (xm >= x0 && xm <= x1 && slot >= 0 && clickSlotPos >= 0 && slot < itemCount)
+				{
+
+                    bool doubleClick = slot == lastSelection && (System::currentTimeMillis() - lastSelectionTime) < 250;
+
+                    selectItem(slot, doubleClick);
+                    lastSelection = slot;
+                    lastSelectionTime = System::currentTimeMillis();
+                }
+				else if (xm >= x0 && xm <= x1 && clickSlotPos < 0)
+				{
+                    clickedHeader(xm - x0, ym - y0 + (int) yo - 4);
+                    doDrag = false;
+                }
+                if (xm >= xx0 && xm <= xx1)
+				{
+                    yDragScale = -1;
+
+                    int max = getMaxPosition() - (y1 - y0 - 4);
+                    if (max < 1) max = 1;
+                    int barHeight = (int) ((y1 - y0) * (y1 - y0) / (float) getMaxPosition());
+                    if (barHeight < 32) barHeight = 32;
+                    if (barHeight > (y1 - y0 - 8)) barHeight = (y1 - y0 - 8);
+
+//                        int yp = yo * (y1 - y0 - barHeight) / max + y0;
+//                        if (yp < y0) yp = y0;
+
+                    yDragScale /= (y1 - y0 - barHeight) / (float) max;
+
+                }
+				else
+				{
+                    yDragScale = 1;
+                }
+                if (doDrag)
+				{
+                    yDrag = (float)ym;
+                }
+				else
+				{
+                    yDrag = DRAG_OUTSIDE;
+                }
+            }
+			else
+			{
+                yDrag = DRAG_OUTSIDE;
+            }
+        }
+		else if (yDrag >= 0)
+		{
+            yo -= (ym - yDrag) * yDragScale;
+            yDrag = (float)ym;
+        }
+
+    }
+	else
+	{
+        yDrag = NO_DRAG;
+    }
+
+    capYPosition();
+
+    glDisable(GL_LIGHTING);
+    glDisable(GL_FOG);
+    Tesselator *t = Tesselator::getInstance();
+
+    glBindTexture(GL_TEXTURE_2D, minecraft->textures->loadTexture(L"/gui/background.png"));
+    glColor4f(1.0f, 1, 1, 1);
+    float s = 32;
+    t->begin();
+    t->color(0x202020);
+    t->vertexUV((float)(x0), (float)( y1), (float)( 0), (float)( x0 / s), (float)( (y1 + (int) yo) / s));
+    t->vertexUV((float)(x1), (float)( y1), (float)( 0), (float)( x1 / s), (float)( (y1 + (int) yo) / s));
+    t->vertexUV((float)(x1), (float)( y0), (float)( 0), (float)( x1 / s), (float)( (y0 + (int) yo) / s));
+    t->vertexUV((float)(x0), (float)( y0), (float)( 0), (float)( x0 / s), (float)( (y0 + (int) yo) / s));
+    t->end();
+
+    int rowX = width / 2 - 92 - 16;
+    int rowBaseY = y0 + 4 - (int) yo;
+
+    if (_renderHeader)
+	{
+        renderHeader(rowX, rowBaseY, t);
+    }
+
+    for (int i = 0; i < itemCount; i++)
+	{
+
+        int y = rowBaseY + (i) * itemHeight + headerHeight;
+        int h = itemHeight - 4;
+
+        if (y > y1 || (y + h) < y0)
+		{
+            continue;
+        }
+
+        if (renderSelection && isSelectedItem(i))
+		{
+            int x0 = width / 2 - (92 + 16 + 2);
+            int x1 = width / 2 + (92 + 16 + 2);
+            glColor4f(1, 1, 1, 1);
+            glDisable(GL_TEXTURE_2D);
+            t->begin();
+            t->color(0x808080);
+            t->vertexUV((float)(x0), (float)( y + h + 2), (float)( 0), (float)( 0), (float)( 1));
+            t->vertexUV((float)(x1), (float)( y + h + 2), (float)( 0), (float)( 1), (float)( 1));
+            t->vertexUV((float)(x1), (float)( y - 2), (float)( 0), (float)( 1), (float)( 0));
+            t->vertexUV((float)(x0), (float)( y - 2), (float)( 0), (float)( 0), (float)( 0));
+
+            t->color(0x000000);
+            t->vertexUV((float)(x0 + 1), (float)( y + h + 1), (float)( 0), (float)( 0), (float)( 1));
+            t->vertexUV((float)(x1 - 1), (float)( y + h + 1), (float)( 0), (float)( 1), (float)( 1));
+            t->vertexUV((float)(x1 - 1), (float)( y - 1), (float)( 0), (float)( 1), (float)( 0));
+            t->vertexUV((float)(x0 + 1), (float)( y - 1), (float)( 0), (float)( 0), (float)( 0));
+
+            t->end();
+            glEnable(GL_TEXTURE_2D);
+        }
+
+        renderItem(i, rowX, y, h, t);
+
+    }
+
+    glDisable(GL_DEPTH_TEST);
+
+
+    int d = 4;
+
+    renderHoleBackground(0, y0, 255, 255);
+    renderHoleBackground(y1, height, 255, 255);
+
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    glDisable(GL_ALPHA_TEST);
+    glShadeModel(GL_SMOOTH);
+
+    glDisable(GL_TEXTURE_2D);
+
+    t->begin();
+    t->color(0x000000, 0);
+    t->vertexUV((float)(x0), (float)( y0 + d), (float)( 0), (float)( 0), (float)( 1));
+    t->vertexUV((float)(x1), (float)( y0 + d), (float)( 0), (float)( 1), (float)( 1));
+    t->color(0x000000, 255);
+    t->vertexUV((float)(x1), (float)( y0), (float)( 0), (float)( 1), (float)( 0));
+    t->vertexUV((float)(x0), (float)( y0), (float)( 0), (float)( 0), (float)( 0));
+    t->end();
+
+    t->begin();
+    t->color(0x000000, 255);
+    t->vertexUV((float)(x0), (float)( y1), (float)( 0), (float)( 0), (float)( 1));
+    t->vertexUV((float)(x1), (float)( y1), (float)( 0), (float)( 1), (float)( 1));
+    t->color(0x000000, 0);
+    t->vertexUV((float)(x1), (float)( y1 - d), (float)( 0), (float)( 1), (float)( 0));
+    t->vertexUV((float)(x0), (float)( y1 - d), (float)( 0), (float)( 0), (float)( 0));
+    t->end();
+
+    {
+        int max = getMaxPosition() - (y1 - y0 - 4);
+        if (max > 0)
+		{
+            int barHeight = (int) (y1 - y0) * (y1 - y0) / (getMaxPosition());
+            if (barHeight < 32) barHeight = 32;
+            if (barHeight > (y1 - y0 - 8)) barHeight = (y1 - y0 - 8);
+
+            int yp = (int) yo * (y1 - y0 - barHeight) / max + y0;
+            if (yp < y0) yp = y0;
+
+            t->begin();
+            t->color(0x000000, 255);
+            t->vertexUV((float)(xx0), (float)( y1), (float)( 0), (float)( 0), (float)( 1));
+            t->vertexUV((float)(xx1), (float)( y1), (float)( 0), (float)( 1), (float)( 1));
+            t->vertexUV((float)(xx1), (float)( y0), (float)( 0), (float)( 1), (float)( 0));
+            t->vertexUV((float)(xx0), (float)( y0), (float)( 0), (float)( 0), (float)( 0));
+            t->end();
+
+            t->begin();
+            t->color(0x808080, 255);
+            t->vertexUV((float)(xx0), (float)( yp + barHeight), (float)( 0), (float)( 0), (float)( 1));
+            t->vertexUV((float)(xx1), (float)( yp + barHeight), (float)( 0), (float)( 1), (float)( 1));
+            t->vertexUV((float)(xx1), (float)( yp), (float)( 0), (float)( 1), (float)( 0));
+            t->vertexUV((float)(xx0), (float)( yp), (float)( 0), (float)( 0), (float)( 0));
+            t->end();
+
+            t->begin();
+            t->color(0xc0c0c0, 255);
+            t->vertexUV((float)(xx0), (float)( yp + barHeight - 1), (float)( 0), (float)( 0), (float)( 1));
+            t->vertexUV((float)(xx1 - 1), (float)( yp + barHeight - 1), (float)( 0), (float)( 1), (float)( 1));
+            t->vertexUV((float)(xx1 - 1), (float)( yp), (float)( 0), (float)( 1), (float)( 0));
+            t->vertexUV((float)(xx0), (float)( yp), (float)( 0), (float)( 0), (float)( 0));
+            t->end();
+        }
+    }
+
+    renderDecorations(xm, ym);
+
+    glEnable(GL_TEXTURE_2D);
+
+    glShadeModel(GL_FLAT);
+    glEnable(GL_ALPHA_TEST);
+    glDisable(GL_BLEND);
+#endif
+}
+
+void ScrolledSelectionList::renderHoleBackground(int y0, int y1, int a0, int a1)
+{
+	// 4J Unused
+#if 0
+    Tesselator *t = Tesselator::getInstance();
+    glBindTexture(GL_TEXTURE_2D, minecraft->textures->loadTexture(L"/gui/background.png"));
+    glColor4f(1.0f, 1, 1, 1);
+    float s = 32;
+    t->begin();
+    t->color(0x404040, a1);
+    t->vertexUV((float)(0), (float)( y1), (float)( 0), (float)( 0), (float)( y1 / s));
+    t->vertexUV((float)(width), (float)( y1), (float)( 0), (float)( width / s), (float)( y1 / s));
+    t->color(0x404040, a0);
+    t->vertexUV((float)(width), (float)( y0), (float)( 0), (float)( width / s), (float)( y0 / s));
+    t->vertexUV((float)(0), (float)( y0), (float)( 0), (float)( 0), (float)( y0 / s));
+    t->end();
+#endif
+}
-- 
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