diff --git a/imgui-binding/scripts/struct_to_java.groovy b/imgui-binding/scripts/struct_to_java.groovy
new file mode 100644
index 0000000..625d587
--- /dev/null
+++ b/imgui-binding/scripts/struct_to_java.groovy
@@ -0,0 +1,81 @@
+def inputTxt = new File(args[0]).text
+def outputFile = new File(args[1])
+def jStructName = args[2] as String
+
+outputFile.text = ''
+
+inputTxt = inputTxt
+    .replace('ImGuiID', 'int')
+    .replace('bool', 'boolean')
+    .replace('char*', 'String')
+    .replace('const char*', 'String')
+
+def regex = ~'(\\w+)\\s+(\\w+)(?:.*?//(.+))?'
+
+inputTxt.eachLine { line ->
+    def trimmedLine = line.trim()
+
+    if (!trimmedLine.contains(';') || trimmedLine.startsWith('#'))
+        return
+
+    def m = regex.matcher(trimmedLine)
+
+    def fieldType
+    def fieldName
+    def fieldComment
+
+    m.find()
+
+    fieldType = m.group(1)
+    fieldName = m.group(2)
+    fieldComment = m.group(3)?.trim()
+
+    def javadoc = null
+
+    if (fieldComment) {
+        javadoc = """   /**
+        |    * $fieldComment
+        |    */""".stripMargin()
+    }
+
+    def classTxt
+
+    if (fieldType == 'ImVec2') {
+        classTxt = """
+        |${javadoc ? javadoc : ''}
+        |   public native void get${fieldName.capitalize()}(ImVec2 dstImVec2); /*
+        |       Jni::ImVec2Cpy(env, &$jStructName->$fieldName, dstImVec2);
+        |    */
+        |
+        |${javadoc ? javadoc : ''}
+        |   public native float get${fieldName.capitalize()}X(); /*
+        |       return $jStructName->${fieldName}.x;
+        |    */
+        |
+        |${javadoc ? javadoc : ''}
+        |   public native float get${fieldName.capitalize()}Y(); /*
+        |       return $jStructName->${fieldName}.y;
+        |    */
+        |
+        |${javadoc ? javadoc : ''}
+        |   public native void set${fieldName.capitalize()}(float x, float y); /*
+        |       $jStructName->${fieldName}.x = x;
+        |       $jStructName->${fieldName}.y = y;
+        |    */
+        """.stripMargin()
+    } else {
+        classTxt = """
+        |${javadoc ? javadoc : ''}
+        |   public native $fieldType get${fieldName.capitalize()}(); /*
+        |       return $jStructName->$fieldName;
+        |    */
+        |
+        |${javadoc ? javadoc : ''}
+        |   public native void set${fieldName.capitalize()}($fieldType ${fieldName.uncapitalize()}); /*
+        |       $jStructName->$fieldName = ${fieldName.uncapitalize()};
+        |    */
+        """.stripMargin()
+    }
+
+    outputFile << classTxt
+}
diff --git a/imgui-binding/src/main/java/imgui/ImGui.java b/imgui-binding/src/main/java/imgui/ImGui.java
index a9da8fa..b540cf8 100644
--- a/imgui-binding/src/main/java/imgui/ImGui.java
+++ b/imgui-binding/src/main/java/imgui/ImGui.java
@@ -18,7 +18,7 @@ import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.nio.file.StandardCopyOption;
 
-public final class ImGui {
+public class ImGui {
     private static final String LIB_PATH_PROP = "imgui.library.path";
     private static final String LIB_NAME_PROP = "imgui.library.name";
     private static final String LIB_NAME_DEFAULT = System.getProperty("os.arch").contains("64") ? "imgui-java64" : "imgui-java";
@@ -114,9 +114,6 @@ public final class ImGui {
     public static void init() {
     }
 
-    private ImGui() {
-    }
-
     /*JNI
         #include <stdint.h>
         #include <imgui.h>
@@ -650,6 +647,13 @@ public final class ImGui {
         ImGui::SetNextWindowBgAlpha(alpha);
     */
 
+    /**
+     * Set next window viewport.
+     */
+    public static native void setNextWindowViewport(int viewportId); /*
+        ImGui::SetNextWindowViewport(viewportId);
+    */
+
     /**
      * (not recommended) set current window position - call within Begin()/End().
      * Prefer using SetNextWindowPos(), as this may incur tearing and side-effects.
diff --git a/imgui-binding/src/main/java/imgui/ImGuiViewport.java b/imgui-binding/src/main/java/imgui/ImGuiViewport.java
index e51044e..4443907 100644
--- a/imgui-binding/src/main/java/imgui/ImGuiViewport.java
+++ b/imgui-binding/src/main/java/imgui/ImGuiViewport.java
@@ -26,14 +26,14 @@ public final class ImGuiViewport extends ImGuiStruct {
     /**
      * Unique identifier for the viewport.
      */
-    public native int getImGuiId(); /*
+    public native int getID(); /*
         return IMGUI_VIEWPORT->ID;
     */
 
     /**
      * Unique identifier for the viewport.
      */
-    public native void setImGuiId(int imGuiID); /*
+    public native void setID(int imGuiID); /*
         IMGUI_VIEWPORT->ID = imGuiID;
     */
 
diff --git a/imgui-binding/src/main/java/imgui/flag/ImGuiDockNodeFlags.java b/imgui-binding/src/main/java/imgui/flag/ImGuiDockNodeFlags.java
index ef833ea..657a82f 100644
--- a/imgui-binding/src/main/java/imgui/flag/ImGuiDockNodeFlags.java
+++ b/imgui-binding/src/main/java/imgui/flag/ImGuiDockNodeFlags.java
@@ -4,10 +4,8 @@ package imgui.flag;
  * Flags for ImGui::DockSpace(), shared/inherited by child nodes.
  * (Some flags can be applied to individual nodes directly)
  */
-public final class ImGuiDockNodeFlags {
-    private ImGuiDockNodeFlags() {
-    }
-
+@SuppressWarnings("HideUtilityClassConstructor")
+public class ImGuiDockNodeFlags {
     public static final int None = 0;
     /**
      * Don't display the dockspace node but keep it alive. Windows docked into this dockspace node won't be undocked.
diff --git a/imgui-binding/src/main/java/imgui/internal/ImGui.java b/imgui-binding/src/main/java/imgui/internal/ImGui.java
new file mode 100644
index 0000000..a8f7adb
--- /dev/null
+++ b/imgui-binding/src/main/java/imgui/internal/ImGui.java
@@ -0,0 +1,138 @@
+package imgui.internal;
+
+import imgui.type.ImInt;
+
+public final class ImGui extends imgui.ImGui {
+    private static final ImGuiDockNode DOCK_NODE = new ImGuiDockNode(0);
+
+    /*JNI
+        #include <stdint.h>
+        #include <imgui.h>
+        #include <imgui_internal.h>
+     */
+
+    // Docking - Builder function needs to be generally called before the node is used/submitted.
+    // - The DockBuilderXXX functions are designed to _eventually_ become a public API, but it is too early to expose it and guarantee stability.
+    // - Do not hold on ImGuiDockNode* pointers! They may be invalidated by any split/merge/remove operation and every frame.
+    // - To create a DockSpace() node, make sure to set the ImGuiDockNodeFlags_DockSpace flag when calling DockBuilderAddNode().
+    //   You can create dockspace nodes (attached to a window) _or_ floating nodes (carry its own window) with this API.
+    // - DockBuilderSplitNode() create 2 child nodes within 1 node. The initial node becomes a parent node.
+    // - If you intend to split the node immediately after creation using DockBuilderSplitNode(), make sure
+    //   to call DockBuilderSetNodeSize() beforehand. If you don't, the resulting split sizes may not be reliable.
+    // - Call DockBuilderFinish() after you are done.
+
+    public static native void dockBuilderDockWindow(String windowName, int nodeId); /*
+        ImGui::DockBuilderDockWindow(windowName, nodeId);
+    */
+
+    public static ImGuiDockNode dockBuilderGetNode(final int nodeId) {
+        final long ptr = nDockBuilderGetNode(nodeId);
+        if (ptr == 0) {
+            return null;
+        } else {
+            DOCK_NODE.ptr = ptr;
+            return DOCK_NODE;
+        }
+    }
+
+    private static native long nDockBuilderGetNode(int nodeId); /*
+        return (intptr_t)ImGui::DockBuilderGetNode(nodeId);
+    */
+
+    public static ImGuiDockNode dockBuilderGetCentralNode(final int nodeId) {
+        final long ptr = nDockBuilderGetCentralNode(nodeId);
+        if (ptr == 0) {
+            return null;
+        } else {
+            DOCK_NODE.ptr = ptr;
+            return DOCK_NODE;
+        }
+    }
+
+    private static native long nDockBuilderGetCentralNode(int nodeId); /*
+        return (intptr_t)ImGui::DockBuilderGetCentralNode(nodeId);
+    */
+
+    public static native int dockBuilderAddNode(); /*
+        return ImGui::DockBuilderAddNode();
+    */
+
+    public static native int dockBuilderAddNode(int nodeId); /*
+        return ImGui::DockBuilderAddNode(nodeId);
+    */
+
+    public static native int dockBuilderAddNode(int nodeId, int flags); /*
+        return ImGui::DockBuilderAddNode(nodeId, flags);
+    */
+
+    /**
+     * Remove node and all its child, undock all windows.
+     */
+    public static native void dockBuilderRemoveNode(int nodeId); /*
+        ImGui::DockBuilderRemoveNode(nodeId);
+    */
+
+    public static native void dockBuilderRemoveNodeDockedWindows(int nodeId); /*
+        ImGui::DockBuilderRemoveNodeDockedWindows(nodeId);
+    */
+
+    public static native void dockBuilderRemoveNodeDockedWindows(int nodeId, boolean clearSettingsRefs); /*
+        ImGui::DockBuilderRemoveNodeDockedWindows(nodeId, clearSettingsRefs);
+    */
+
+    /**
+     * Remove all split/hierarchy. All remaining docked windows will be re-docked to the remaining root node (node_id).
+     */
+    public static native void dockBuilderRemoveNodeChildNodes(int nodeId); /*
+        ImGui::DockBuilderRemoveNodeChildNodes(nodeId);
+    */
+
+    public static native void dockBuilderSetNodePos(int nodeId, float posX, float posY); /*
+        ImGui::DockBuilderSetNodePos(nodeId, ImVec2(posX, posY));
+    */
+
+    public static native void dockBuilderSetNodeSize(int nodeId, float sizeX, float sizeY); /*
+        ImGui::DockBuilderSetNodeSize(nodeId, ImVec2(sizeX, sizeY));
+    */
+
+    /**
+     * Create 2 child nodes in this parent node.
+     */
+    public static int dockBuilderSplitNode(int nodeId, int splitDir, float sizeRationForNodeAtDir, ImInt outIdAtDir, ImInt outIdAtOppositeDir) {
+        if (outIdAtDir == null && outIdAtOppositeDir != null) {
+            return nDockBuilderSplitNode(nodeId, splitDir, sizeRationForNodeAtDir, null, outIdAtOppositeDir.getData());
+        } else if (outIdAtDir != null && outIdAtOppositeDir == null) {
+            return nDockBuilderSplitNode(nodeId, splitDir, sizeRationForNodeAtDir, outIdAtDir.getData());
+        } else if (outIdAtDir != null) {
+            return nDockBuilderSplitNode(nodeId, splitDir, sizeRationForNodeAtDir, outIdAtDir.getData(), outIdAtOppositeDir.getData());
+        } else {
+            return nDockBuilderSplitNode(nodeId, splitDir, sizeRationForNodeAtDir);
+        }
+    }
+
+    private static native int nDockBuilderSplitNode(int nodeId, int splitDir, float sizeRationForNodeAtDir, int[] outIdAtDir, int[] outIdAtOppositeDir); /*
+        return ImGui::DockBuilderSplitNode(nodeId, splitDir, sizeRationForNodeAtDir, (ImGuiID*)&outIdAtDir[0], (ImGuiID*)&outIdAtOppositeDir[0]);
+    */
+
+    private static native int nDockBuilderSplitNode(int nodeId, int splitDir, float sizeRationForNodeAtDir); /*
+        return ImGui::DockBuilderSplitNode(nodeId, splitDir, sizeRationForNodeAtDir, NULL, NULL);
+    */
+
+    private static native int nDockBuilderSplitNode(int nodeId, int splitDir, float sizeRationForNodeAtDir, int[] outIdAtDir); /*
+        return ImGui::DockBuilderSplitNode(nodeId, splitDir, sizeRationForNodeAtDir, (ImGuiID*)&outIdAtDir[0], NULL);
+    */
+
+    private static native int nDockBuilderSplitNode(int nodeId, int splitDir, float sizeRationForNodeAtDir, Object o, int[] outIdAtOppositeDir); /*
+        return ImGui::DockBuilderSplitNode(nodeId, splitDir, sizeRationForNodeAtDir, NULL, (ImGuiID*)&outIdAtOppositeDir[0]);
+    */
+
+    // TODO DockBuilderCopyDockSpace, DockBuilderCopyNode
+
+    public static native void dockBuilderCopyWindowSettings(String srcName, String dstName); /*
+        ImGui::DockBuilderCopyWindowSettings(srcName, dstName);
+    */
+
+    public static native void dockBuilderFinish(int nodeId); /*
+        ImGui::DockBuilderFinish(nodeId);
+    */
+}
diff --git a/imgui-binding/src/main/java/imgui/internal/ImGuiDockNode.java b/imgui-binding/src/main/java/imgui/internal/ImGuiDockNode.java
new file mode 100644
index 0000000..aae7678
--- /dev/null
+++ b/imgui-binding/src/main/java/imgui/internal/ImGuiDockNode.java
@@ -0,0 +1,645 @@
+package imgui.internal;
+
+import imgui.ImGuiWindowClass;
+import imgui.ImVec2;
+import imgui.binding.ImGuiStruct;
+
+public final class ImGuiDockNode extends ImGuiStruct {
+    private static final ImGuiDockNode PARENT_NODE = new ImGuiDockNode(0);
+    private static final ImGuiDockNode CHILD_NODE_FIRST = new ImGuiDockNode(0);
+    private static final ImGuiDockNode CHILD_NODE_SECOND = new ImGuiDockNode(0);
+    private static final ImGuiWindowClass WINDOW_CLASS = new ImGuiWindowClass(0);
+    private static final ImGuiDockNode CENTRAL_NODE = new ImGuiDockNode(0);
+    private static final ImGuiDockNode ONLY_NODE_WITH_WINDOWS = new ImGuiDockNode(0);
+    private static final ImRect RECT = new ImRect();
+
+    public ImGuiDockNode(final long ptr) {
+        super(ptr);
+    }
+
+    /*JNI
+        #include <stdint.h>
+        #include <imgui.h>
+        #include <imgui_internal.h>
+        #include "jni_common.h"
+        #include "jni_binding_struct.h"
+
+        #define IMGUI_DOCK_NODE ((ImGuiDockNode*)STRUCT_PTR)
+     */
+
+    public native int getID(); /*
+       return IMGUI_DOCK_NODE->ID;
+    */
+
+
+    public native void setID(int imGuiID); /*
+       IMGUI_DOCK_NODE->ID = imGuiID;
+    */
+
+    /**
+     * Flags shared by all nodes of a same dockspace hierarchy (inherited from the root node)
+     */
+    public native int getSharedFlags(); /*
+       return IMGUI_DOCK_NODE->SharedFlags;
+    */
+
+    /**
+     * Flags shared by all nodes of a same dockspace hierarchy (inherited from the root node)
+     */
+    public native void setSharedFlags(int sharedFlags); /*
+       IMGUI_DOCK_NODE->SharedFlags = sharedFlags;
+    */
+
+    /**
+     * Flags shared by all nodes of a same dockspace hierarchy (inherited from the root node)
+     */
+    public void addSharedFlags(final int flags) {
+        setSharedFlags(getSharedFlags() | flags);
+    }
+
+    /**
+     * Flags shared by all nodes of a same dockspace hierarchy (inherited from the root node)
+     */
+    public void removeSharedFlags(final int flags) {
+        setSharedFlags(getSharedFlags() & ~(flags));
+    }
+
+    /**
+     * Flags specific to this node
+     */
+    public native int getLocalFlags(); /*
+       return IMGUI_DOCK_NODE->LocalFlags;
+    */
+
+    /**
+     * Flags specific to this node
+     */
+    public native void setLocalFlags(int localFlags); /*
+       IMGUI_DOCK_NODE->LocalFlags = localFlags;
+    */
+
+    /**
+     * Flags specific to this node
+     */
+    public void addLocalFlags(final int flags) {
+        setLocalFlags(getLocalFlags() | flags);
+    }
+
+    /**
+     * Flags specific to this node
+     */
+    public void removeLocalFlags(final int flags) {
+        setLocalFlags(getLocalFlags() & ~(flags));
+    }
+
+    public ImGuiDockNode getParentNode() {
+        PARENT_NODE.ptr = nGetParentNode();
+        return PARENT_NODE;
+    }
+
+    private native long nGetParentNode(); /*
+        return (intptr_t)IMGUI_DOCK_NODE->ParentNode;
+    */
+
+    public void setParentNode(final ImGuiDockNode imGuiDockNode) {
+        nSetParentNode(imGuiDockNode.ptr);
+    }
+
+    private native void nSetParentNode(long imGuiDockNodePtr); /*
+        IMGUI_DOCK_NODE->ParentNode = (ImGuiDockNode*)imGuiDockNodePtr;
+    */
+
+    /**
+     * [Split node only] Child nodes (left/right or top/bottom). Consider switching to an array.
+     */
+    public ImGuiDockNode getChildNodeFirst() {
+        CHILD_NODE_FIRST.ptr = nGetChildNodeFirst();
+        return CHILD_NODE_FIRST;
+    }
+
+    private native long nGetChildNodeFirst(); /*
+        return (intptr_t)IMGUI_DOCK_NODE->ChildNodes[0];
+    */
+
+    /**
+     * [Split node only] Child nodes (left/right or top/bottom). Consider switching to an array.
+     */
+    public void setChildNodeFirst(final ImGuiDockNode imGuiDockNode) {
+        nSetChildNodeFirst(imGuiDockNode.ptr);
+    }
+
+    private native void nSetChildNodeFirst(long imGuiDockNodePtr); /*
+        IMGUI_DOCK_NODE->ChildNodes[0] = (ImGuiDockNode*)imGuiDockNodePtr;
+    */
+
+    /**
+     * [Split node only] Child nodes (left/right or top/bottom). Consider switching to an array.
+     */
+    public ImGuiDockNode getChildNodeSecond() {
+        CHILD_NODE_SECOND.ptr = nGetChildNodeSecond();
+        return CHILD_NODE_SECOND;
+    }
+
+    private native long nGetChildNodeSecond(); /*
+        return (intptr_t)IMGUI_DOCK_NODE->ChildNodes[1];
+    */
+
+    /**
+     * [Split node only] Child nodes (left/right or top/bottom). Consider switching to an array.
+     */
+    public void setChildNodeSecond(final ImGuiDockNode imGuiDockNode) {
+        nSetChildNodeSecond(imGuiDockNode.ptr);
+    }
+
+    private native void nSetChildNodeSecond(long imGuiDockNodePtr); /*
+        IMGUI_DOCK_NODE->ChildNodes[1] = (ImGuiDockNode*)imGuiDockNodePtr;
+    */
+
+    // TODO  Windows, TabBar
+
+    /**
+     * [Root node only]
+     */
+    public ImGuiWindowClass getWindowClass() {
+        WINDOW_CLASS.ptr = nGetWindowClass();
+        return WINDOW_CLASS;
+    }
+
+    /**
+     * [Root node only]
+     */
+    private native long nGetWindowClass(); /*
+        return (intptr_t)&IMGUI_DOCK_NODE->WindowClass;
+    */
+
+    /**
+     * [Root node only]
+     */
+    public void setWindowClass(final ImGuiWindowClass imGuiWindowClass) {
+        nSetWindowClass(imGuiWindowClass.ptr);
+    }
+
+    /**
+     * [Root node only]
+     */
+    private native void nSetWindowClass(long imGuiWindowClassPtr); /*
+        IMGUI_DOCK_NODE->WindowClass = *((ImGuiWindowClass*)imGuiWindowClassPtr);
+    */
+
+    /**
+     * Current position
+     */
+    public native void getPos(ImVec2 dstImVec2); /*
+       Jni::ImVec2Cpy(env, &IMGUI_DOCK_NODE->Pos, dstImVec2);
+    */
+
+    /**
+     * Current position
+     */
+    public native float getPosX(); /*
+       return IMGUI_DOCK_NODE->Pos.x;
+    */
+
+    /**
+     * Current position
+     */
+    public native float getPosY(); /*
+       return IMGUI_DOCK_NODE->Pos.y;
+    */
+
+    /**
+     * Current position
+     */
+    public native void setPos(float x, float y); /*
+       IMGUI_DOCK_NODE->Pos.x = x;
+       IMGUI_DOCK_NODE->Pos.y = y;
+    */
+
+    /**
+     * Current size
+     */
+    public native void getSize(ImVec2 dstImVec2); /*
+       Jni::ImVec2Cpy(env, &IMGUI_DOCK_NODE->Size, dstImVec2);
+    */
+
+    /**
+     * Current size
+     */
+    public native float getSizeX(); /*
+       return IMGUI_DOCK_NODE->Size.x;
+    */
+
+    /**
+     * Current size
+     */
+    public native float getSizeY(); /*
+       return IMGUI_DOCK_NODE->Size.y;
+    */
+
+    /**
+     * Current size
+     */
+    public native void setSize(float x, float y); /*
+       IMGUI_DOCK_NODE->Size.x = x;
+       IMGUI_DOCK_NODE->Size.y = y;
+    */
+
+    /**
+     * [Split node only] Last explicitly written-to size (overridden when using a splitter affecting the node), used to calculate Size.
+     */
+    public native void getSizeRef(ImVec2 dstImVec2); /*
+       Jni::ImVec2Cpy(env, &IMGUI_DOCK_NODE->SizeRef, dstImVec2);
+    */
+
+    /**
+     * [Split node only] Last explicitly written-to size (overridden when using a splitter affecting the node), used to calculate Size.
+     */
+    public native float getSizeRefX(); /*
+       return IMGUI_DOCK_NODE->SizeRef.x;
+    */
+
+    /**
+     * [Split node only] Last explicitly written-to size (overridden when using a splitter affecting the node), used to calculate Size.
+     */
+    public native float getSizeRefY(); /*
+       return IMGUI_DOCK_NODE->SizeRef.y;
+    */
+
+    /**
+     * [Split node only] Last explicitly written-to size (overridden when using a splitter affecting the node), used to calculate Size.
+     */
+    public native void setSizeRef(float x, float y); /*
+       IMGUI_DOCK_NODE->SizeRef.x = x;
+       IMGUI_DOCK_NODE->SizeRef.y = y;
+    */
+
+    /**
+     * [Split node only] Split axis (X or Y)
+     */
+    public native int getSplitAxis(); /*
+       return IMGUI_DOCK_NODE->SplitAxis;
+    */
+
+    /**
+     * [Split node only] Split axis (X or Y)
+     */
+    public native void setSplitAxis(int splitAxis); /*
+       IMGUI_DOCK_NODE->SplitAxis = (ImGuiAxis)splitAxis;
+    */
+
+
+    public native int getState(); /*
+       return IMGUI_DOCK_NODE->State;
+    */
+
+
+    public native void setState(int state); /*
+       IMGUI_DOCK_NODE->State = (ImGuiDockNodeState)state;
+    */
+
+    // TODO HostWindow, VisibleWindow
+
+    /**
+     * [Root node only] Pointer to central node.
+     */
+    public ImGuiDockNode getCentralNode() {
+        CENTRAL_NODE.ptr = nGetCentralNode();
+        return PARENT_NODE;
+    }
+
+    private native long nGetCentralNode(); /*
+        return (intptr_t)IMGUI_DOCK_NODE->CentralNode;
+    */
+
+    /**
+     * [Root node only] Pointer to central node.
+     */
+    public void setCentralNode(final ImGuiDockNode imGuiDockNode) {
+        nSetCentralNode(imGuiDockNode.ptr);
+    }
+
+    private native void nSetCentralNode(long imGuiDockNodePtr); /*
+        IMGUI_DOCK_NODE->CentralNode = (ImGuiDockNode*)imGuiDockNodePtr;
+    */
+
+    /**
+     * [Root node only] Set when there is a single visible node within the hierarchy.
+     */
+    public ImGuiDockNode getOnlyNodeWithWindows() {
+        ONLY_NODE_WITH_WINDOWS.ptr = nGetOnlyNodeWithWindows();
+        return PARENT_NODE;
+    }
+
+    private native long nGetOnlyNodeWithWindows(); /*
+        return (intptr_t)IMGUI_DOCK_NODE->OnlyNodeWithWindows;
+    */
+
+    /**
+     * [Root node only] Set when there is a single visible node within the hierarchy.
+     */
+    public void setOnlyNodeWithWindows(final ImGuiDockNode imGuiDockNode) {
+        nSetOnlyNodeWithWindows(imGuiDockNode.ptr);
+    }
+
+    private native void nSetOnlyNodeWithWindows(long imGuiDockNodePtr); /*
+        IMGUI_DOCK_NODE->OnlyNodeWithWindows = (ImGuiDockNode*)imGuiDockNodePtr;
+    */
+
+    /**
+     * Last frame number the node was updated or kept alive explicitly with DockSpace() + int_KeepAliveOnly
+     */
+    public native int getLastFrameAlive(); /*
+       return IMGUI_DOCK_NODE->LastFrameAlive;
+    */
+
+    /**
+     * Last frame number the node was updated or kept alive explicitly with DockSpace() + int_KeepAliveOnly
+     */
+    public native void setLastFrameAlive(int lastFrameAlive); /*
+       IMGUI_DOCK_NODE->LastFrameAlive = lastFrameAlive;
+    */
+
+    /**
+     * Last frame number the node was updated.
+     */
+    public native int getLastFrameActive(); /*
+       return IMGUI_DOCK_NODE->LastFrameActive;
+    */
+
+    /**
+     * Last frame number the node was updated.
+     */
+    public native void setLastFrameActive(int lastFrameActive); /*
+       IMGUI_DOCK_NODE->LastFrameActive = lastFrameActive;
+    */
+
+    /**
+     * Last frame number the node was focused.
+     */
+    public native int getLastFrameFocused(); /*
+       return IMGUI_DOCK_NODE->LastFrameFocused;
+    */
+
+    /**
+     * Last frame number the node was focused.
+     */
+    public native void setLastFrameFocused(int lastFrameFocused); /*
+       IMGUI_DOCK_NODE->LastFrameFocused = lastFrameFocused;
+    */
+
+    /**
+     * [Root node only] Which of our child docking node (any ancestor in the hierarchy) was last focused.
+     */
+    public native int getLastFocusedNodeId(); /*
+       return IMGUI_DOCK_NODE->LastFocusedNodeId;
+    */
+
+    /**
+     * [Root node only] Which of our child docking node (any ancestor in the hierarchy) was last focused.
+     */
+    public native void setLastFocusedNodeId(int lastFocusedNodeId); /*
+       IMGUI_DOCK_NODE->LastFocusedNodeId = lastFocusedNodeId;
+    */
+
+    /**
+     * [Leaf node only] Which of our tab/window is selected.
+     */
+    public native int getSelectedTabId(); /*
+       return IMGUI_DOCK_NODE->SelectedTabId;
+    */
+
+    /**
+     * [Leaf node only] Which of our tab/window is selected.
+     */
+    public native void setSelectedTabId(int selectedTabId); /*
+       IMGUI_DOCK_NODE->SelectedTabId = selectedTabId;
+    */
+
+    /**
+     * [Leaf node only] Set when closing a specific tab/window.
+     */
+    public native int getWantCloseTabId(); /*
+       return IMGUI_DOCK_NODE->WantCloseTabId;
+    */
+
+    /**
+     * [Leaf node only] Set when closing a specific tab/window.
+     */
+    public native void setWantCloseTabId(int wantCloseTabId); /*
+       IMGUI_DOCK_NODE->WantCloseTabId = wantCloseTabId;
+    */
+
+
+    public native int getAuthorityForPos(); /*
+       return IMGUI_DOCK_NODE->AuthorityForPos;
+    */
+
+
+    public native void setAuthorityForPos(int authorityForPos); /*
+       IMGUI_DOCK_NODE->AuthorityForPos = authorityForPos;
+    */
+
+
+    public native int getAuthorityForSize(); /*
+       return IMGUI_DOCK_NODE->AuthorityForSize;
+    */
+
+
+    public native void setAuthorityForSize(int authorityForSize); /*
+       IMGUI_DOCK_NODE->AuthorityForSize = authorityForSize;
+    */
+
+
+    public native int getAuthorityForViewport(); /*
+       return IMGUI_DOCK_NODE->AuthorityForViewport;
+    */
+
+
+    public native void setAuthorityForViewport(int authorityForViewport); /*
+       IMGUI_DOCK_NODE->AuthorityForViewport = authorityForViewport;
+    */
+
+    /**
+     * Set to false when the node is hidden (usually disabled as it has no active window)
+     */
+    public native boolean getIsVisible(); /*
+       return IMGUI_DOCK_NODE->IsVisible;
+    */
+
+    /**
+     * Set to false when the node is hidden (usually disabled as it has no active window)
+     */
+    public native void setIsVisible(boolean isVisible); /*
+       IMGUI_DOCK_NODE->IsVisible = isVisible;
+    */
+
+
+    public native boolean getIsFocused(); /*
+       return IMGUI_DOCK_NODE->IsFocused;
+    */
+
+
+    public native void setIsFocused(boolean isFocused); /*
+       IMGUI_DOCK_NODE->IsFocused = isFocused;
+    */
+
+
+    public native boolean getHasCloseButton(); /*
+       return IMGUI_DOCK_NODE->HasCloseButton;
+    */
+
+
+    public native void setHasCloseButton(boolean hasCloseButton); /*
+       IMGUI_DOCK_NODE->HasCloseButton = hasCloseButton;
+    */
+
+
+    public native boolean getHasWindowMenuButton(); /*
+       return IMGUI_DOCK_NODE->HasWindowMenuButton;
+    */
+
+
+    public native void setHasWindowMenuButton(boolean hasWindowMenuButton); /*
+       IMGUI_DOCK_NODE->HasWindowMenuButton = hasWindowMenuButton;
+    */
+
+
+    public native boolean getEnableCloseButton(); /*
+       return IMGUI_DOCK_NODE->EnableCloseButton;
+    */
+
+
+    public native void setEnableCloseButton(boolean enableCloseButton); /*
+       IMGUI_DOCK_NODE->EnableCloseButton = enableCloseButton;
+    */
+
+    /**
+     * Set when closing all tabs at once.
+     */
+    public native boolean getWantCloseAll(); /*
+       return IMGUI_DOCK_NODE->WantCloseAll;
+    */
+
+    /**
+     * Set when closing all tabs at once.
+     */
+    public native void setWantCloseAll(boolean wantCloseAll); /*
+       IMGUI_DOCK_NODE->WantCloseAll = wantCloseAll;
+    */
+
+
+    public native boolean getWantLockSizeOnce(); /*
+       return IMGUI_DOCK_NODE->WantLockSizeOnce;
+    */
+
+
+    public native void setWantLockSizeOnce(boolean wantLockSizeOnce); /*
+       IMGUI_DOCK_NODE->WantLockSizeOnce = wantLockSizeOnce;
+    */
+
+    /**
+     * After a node extraction we need to transition toward moving the newly created host window
+     */
+    public native boolean getWantMouseMove(); /*
+       return IMGUI_DOCK_NODE->WantMouseMove;
+    */
+
+    /**
+     * After a node extraction we need to transition toward moving the newly created host window
+     */
+    public native void setWantMouseMove(boolean wantMouseMove); /*
+       IMGUI_DOCK_NODE->WantMouseMove = wantMouseMove;
+    */
+
+
+    public native boolean getWantHiddenTabBarUpdate(); /*
+       return IMGUI_DOCK_NODE->WantHiddenTabBarUpdate;
+    */
+
+
+    public native void setWantHiddenTabBarUpdate(boolean wantHiddenTabBarUpdate); /*
+       IMGUI_DOCK_NODE->WantHiddenTabBarUpdate = wantHiddenTabBarUpdate;
+    */
+
+
+    public native boolean getWantHiddenTabBarToggle(); /*
+       return IMGUI_DOCK_NODE->WantHiddenTabBarToggle;
+    */
+
+
+    public native void setWantHiddenTabBarToggle(boolean wantHiddenTabBarToggle); /*
+       IMGUI_DOCK_NODE->WantHiddenTabBarToggle = wantHiddenTabBarToggle;
+    */
+
+    /**
+     * Update by DockNodeTreeUpdatePosSize() write-filtering
+     */
+    public native boolean getMarkedForPosSizeWrite(); /*
+       return IMGUI_DOCK_NODE->MarkedForPosSizeWrite;
+    */
+
+    /**
+     * Update by DockNodeTreeUpdatePosSize() write-filtering
+     */
+    public native void setMarkedForPosSizeWrite(boolean markedForPosSizeWrite); /*
+       IMGUI_DOCK_NODE->MarkedForPosSizeWrite = markedForPosSizeWrite;
+    */
+
+    public native boolean isRootNode(); /*
+        return IMGUI_DOCK_NODE->IsRootNode();
+    */
+
+    public native boolean isDockSpace(); /*
+        return IMGUI_DOCK_NODE->IsDockSpace();
+    */
+
+    public native boolean isFloatingNode(); /*
+        return IMGUI_DOCK_NODE->IsFloatingNode();
+    */
+
+    public native boolean isCentralNode(); /*
+        return IMGUI_DOCK_NODE->IsCentralNode();
+    */
+
+    /**
+     * Hidden tab bar can be shown back by clicking the small triangle
+     */
+    public native boolean isHiddenTabBar(); /*
+        return IMGUI_DOCK_NODE->IsHiddenTabBar();
+    */
+
+    /**
+     * Never show a tab bar
+     */
+    public native boolean isNoTabBar(); /*
+        return IMGUI_DOCK_NODE->IsNoTabBar();
+    */
+
+    public native boolean isSplitNode(); /*
+        return IMGUI_DOCK_NODE->IsSplitNode();
+    */
+
+    public native boolean isLeafNode(); /*
+        return IMGUI_DOCK_NODE->IsLeafNode();
+    */
+
+    public native boolean isEmpty(); /*
+        return IMGUI_DOCK_NODE->IsEmpty();
+    */
+
+    public native int getMergedFlags(); /*
+        return IMGUI_DOCK_NODE->GetMergedFlags();
+    */
+
+    public ImRect rect() {
+        nRect(RECT.min, RECT.max);
+        return RECT;
+    }
+
+    private native void nRect(ImVec2 minDstImVec2, ImVec2 maxDstImVec2); /*
+        ImRect rect = IMGUI_DOCK_NODE->Rect();
+        Jni::ImVec2Cpy(env, &rect.Min, minDstImVec2);
+        Jni::ImVec2Cpy(env, &rect.Max, maxDstImVec2);
+    */
+}
+
diff --git a/imgui-binding/src/main/java/imgui/internal/ImRect.java b/imgui-binding/src/main/java/imgui/internal/ImRect.java
new file mode 100644
index 0000000..f0c5569
--- /dev/null
+++ b/imgui-binding/src/main/java/imgui/internal/ImRect.java
@@ -0,0 +1,64 @@
+package imgui.internal;
+
+import imgui.ImVec2;
+
+import java.util.Objects;
+
+/**
+ * Helper: ImRect (2D axis aligned bounding-box)
+ * NB: we can't rely on ImVec2 math operators being available here!
+ */
+public final class ImRect {
+    /**
+     * Upper-left
+     */
+    public final ImVec2 min = new ImVec2();
+    /**
+     * Lower-right
+     */
+    public final ImVec2 max = new ImVec2();
+
+    public ImRect() {
+    }
+
+    public ImRect(final ImVec2 min, final ImVec2 max) {
+        this.min.x = min.x;
+        this.min.y = min.y;
+        this.max.x = max.x;
+        this.max.y = max.y;
+    }
+
+    public ImRect(final float x1, final  float y1, final  float x2, final float y2) {
+        min.x = x1;
+        min.y = y1;
+        max.x = x2;
+        max.y = y2;
+    }
+
+    @Override
+    public String toString() {
+        return "ImRect{"
+            + "min=" + min
+            + ", max=" + max
+            + '}';
+    }
+
+    @Override
+    public boolean equals(final Object o) {
+        if (this == o) {
+            return true;
+        }
+
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+
+        final ImRect imRect = (ImRect) o;
+        return Objects.equals(min, imRect.min) && Objects.equals(max, imRect.max);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(min, max);
+    }
+}
diff --git a/imgui-binding/src/main/java/imgui/internal/flag/ImGuiAxis.java b/imgui-binding/src/main/java/imgui/internal/flag/ImGuiAxis.java
new file mode 100644
index 0000000..19e9796
--- /dev/null
+++ b/imgui-binding/src/main/java/imgui/internal/flag/ImGuiAxis.java
@@ -0,0 +1,10 @@
+package imgui.internal.flag;
+
+public final class ImGuiAxis {
+    private ImGuiAxis() {
+    }
+
+    public static final int None = -1;
+    public static final int X = 0;
+    public static final int Y = 1;
+}
diff --git a/imgui-binding/src/main/java/imgui/internal/flag/ImGuiDockNodeFlags.java b/imgui-binding/src/main/java/imgui/internal/flag/ImGuiDockNodeFlags.java
new file mode 100644
index 0000000..ba5fd92
--- /dev/null
+++ b/imgui-binding/src/main/java/imgui/internal/flag/ImGuiDockNodeFlags.java
@@ -0,0 +1,50 @@
+package imgui.internal.flag;
+
+public final class ImGuiDockNodeFlags extends imgui.flag.ImGuiDockNodeFlags {
+    private ImGuiDockNodeFlags() {
+    }
+
+    /**
+     * A dockspace is a node that occupy space within an existing user window. Otherwise the node is floating and create its own window.
+     */
+    public static final int DockSpace = 1 << 10;
+    /**
+     * The central node has 2 main properties: stay visible when empty, only use "remaining" spaces from its neighbor.
+     */
+    public static final int CentralNode = 1 << 11;
+    /**
+     * Tab bar is completely unavailable. No triangle in the corner to enable it back.
+     */
+    public static final int NoTabBar = 1 << 12;
+    /**
+     * Tab bar is hidden, with a triangle in the corner to show it again (NB: actual tab-bar instance may be destroyed as this is only used for single-window tab bar)
+     */
+    public static final int HiddenTabBar = 1 << 13;
+    /**
+     * Disable window/docking menu (that one that appears instead of the collapse button)
+     */
+    public static final int NoWindowMenuButton = 1 << 14;
+    public static final int NoCloseButton = 1 << 15;
+    /**
+     * Disable any form of docking in this dockspace or individual node. (On a whole dockspace, this pretty much defeat the purpose of using a dockspace at all). Note: when turned on, existing docked nodes will be preserved.
+     */
+    public static final int NoDocking = 1 << 16;
+    /**
+     * [EXPERIMENTAL] Prevent another window/node from splitting this node.
+     */
+    public static final int NoDockingSplitMe = 1 << 17;
+    /**
+     * [EXPERIMENTAL] Prevent this node from splitting another window/node.
+     */
+    public static final int NoDockingSplitOther = 1 << 18;
+    /**
+     * [EXPERIMENTAL] Prevent another window/node to be docked over this node.
+     */
+    public static final int NoDockingOverMe = 1 << 19;
+    /**
+     * [EXPERIMENTAL] Prevent this node to be docked over another window/node.
+     */
+    public static final int NoDockingOverOther = 1 << 20;
+    public static final int NoResizeX = 1 << 21;
+    public static final int NoResizeY = 1 << 22;
+}
diff --git a/imgui-binding/src/main/java/imgui/internal/flag/ImGuiDockNodeState.java b/imgui-binding/src/main/java/imgui/internal/flag/ImGuiDockNodeState.java
new file mode 100644
index 0000000..75a6ca4
--- /dev/null
+++ b/imgui-binding/src/main/java/imgui/internal/flag/ImGuiDockNodeState.java
@@ -0,0 +1,11 @@
+package imgui.internal.flag;
+
+public final class ImGuiDockNodeState {
+    private ImGuiDockNodeState() {
+    }
+
+    public static final int Unknown = 0;
+    public static final int HostWindowHiddenBecauseSingleWindow = 1;
+    public static final int HostWindowHiddenBecauseWindowsAreResizing = 2;
+    public static final int HostWindowVisible = 3;
+}
diff --git a/imgui-lwjgl3/src/test/java/ExampleUi.java b/imgui-lwjgl3/src/test/java/ExampleUi.java
index fe046cf..fea2230 100644
--- a/imgui-lwjgl3/src/test/java/ExampleUi.java
+++ b/imgui-lwjgl3/src/test/java/ExampleUi.java
@@ -1,11 +1,15 @@
 import imgui.ImGuiViewport;
-import imgui.type.ImBoolean;
-import imgui.ImColor;
-import imgui.ImGui;
-import imgui.type.ImString;
 import imgui.flag.ImGuiColorEditFlags;
 import imgui.flag.ImGuiCond;
+import imgui.flag.ImGuiDir;
 import imgui.flag.ImGuiInputTextFlags;
+import imgui.flag.ImGuiStyleVar;
+import imgui.flag.ImGuiWindowFlags;
+import imgui.internal.ImGui;
+import imgui.internal.flag.ImGuiDockNodeFlags;
+import imgui.type.ImBoolean;
+import imgui.ImColor;
+import imgui.type.ImString;
 import org.lwjgl.BufferUtils;
 
 import javax.imageio.ImageIO;
@@ -31,6 +35,7 @@ final class ExampleUi {
 
     // Resizable input example
     private final ImString resizableStr = new ImString(5);
+    private final ImBoolean showBottomDockedWindow = new ImBoolean(true);
     private final ImBoolean showDemoWindow = new ImBoolean();
 
     // Attach image example
@@ -43,6 +48,42 @@ final class ExampleUi {
     void render() {
         final ImGuiViewport mainViewport = ImGui.getMainViewport();
 
+        int windowFlags = 0;
+
+        ImGui.setNextWindowPos(mainViewport.getWorkPosX(), mainViewport.getWorkPosY());
+        ImGui.setNextWindowSize(mainViewport.getWorkSizeX(), mainViewport.getWorkSizeY());
+        ImGui.setNextWindowViewport(mainViewport.getID());
+        ImGui.pushStyleVar(ImGuiStyleVar.WindowRounding, 0);
+        ImGui.pushStyleVar(ImGuiStyleVar.WindowBorderSize, 0);
+        windowFlags |= ImGuiWindowFlags.NoTitleBar | ImGuiWindowFlags.NoCollapse | ImGuiWindowFlags.NoResize | ImGuiWindowFlags.NoMove;
+        windowFlags |= ImGuiWindowFlags.NoBringToFrontOnFocus | ImGuiWindowFlags.NoNavFocus | ImGuiWindowFlags.NoBackground;
+
+        ImGui.pushStyleVar(ImGuiStyleVar.WindowPadding, 0, 0);
+        ImGui.begin("Dockspace Demo", windowFlags);
+        ImGui.popStyleVar(3);
+
+        final int dockspaceId = ImGui.getID("MyDockSpace");
+
+        if (ImGui.dockBuilderGetNode(dockspaceId) == null) {
+            ImGui.dockBuilderRemoveNode(dockspaceId);
+            ImGui.dockBuilderAddNode(dockspaceId, ImGuiDockNodeFlags.DockSpace);
+
+            final int dockIdBottom = ImGui.dockBuilderSplitNode(dockspaceId, ImGuiDir.Down, .25f, null, null);
+
+            ImGui.dockBuilderDockWindow("Bottom Docked Window", dockIdBottom);
+            ImGui.dockBuilderSetNodeSize(dockIdBottom, 150f, 150f);
+            ImGui.dockBuilderFinish(dockspaceId);
+        }
+
+        ImGui.dockSpace(dockspaceId, 0, 0, ImGuiDockNodeFlags.PassthruCentralNode);
+        ImGui.end();
+
+        if (showBottomDockedWindow.get()) {
+            ImGui.begin("Bottom Docked Window", showBottomDockedWindow);
+            ImGui.text("An example of how to create docked windows.");
+            ImGui.end();
+        }
+
         ImGui.setNextWindowSize(600, 300, ImGuiCond.Once);
         ImGui.setNextWindowPos(mainViewport.getWorkPosX() + 10, mainViewport.getWorkPosY() + 10, ImGuiCond.Once);
 
@@ -54,6 +95,7 @@ final class ExampleUi {
         ImGui.getWindowDrawList().addImage(dukeTexture, xPoint, yPoint - 180, xPoint + 100, yPoint);
 
         // Checkbox to show demo window
+        ImGui.checkbox("Show bottom docked window", showBottomDockedWindow);
         ImGui.checkbox("Show demo window", showDemoWindow);
 
         ImGui.separator();