imgui-java/example/src/main/java/ExampleImNodes.java at main · SpaiR/imgui-java · GitHub

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import imgui.extension.imnodes.ImNodes;

import imgui.extension.imnodes.ImNodesContext;

import imgui.extension.imnodes.ImNodesEditorContext;

import imgui.extension.imnodes.flag.ImNodesPinShape;

import imgui.extension.imnodes.flag.ImNodesMiniMapLocation;

import imgui.flag.ImGuiCond;

import imgui.flag.ImGuiMouseButton;

import imgui.internal.ImGui;

import imgui.type.ImBoolean;

import imgui.type.ImInt;

import java.awt.Desktop;

import java.net.URI;

public class ExampleImNodes {

private static final String URL = "https://github.com/Nelarius/imnodes/tree/857cc86";

private static final ImInt LINK_A = new ImInt();

private static final ImInt LINK_B = new ImInt();

private static ImNodesEditorContext editorContext = null;

static {

ImNodes.createContext();

editorContext = ImNodes.editorContextCreate();

}

public static void show(final ImBoolean showImNodesWindow, final Graph graph) {

ImGui.setNextWindowSize(500, 400, ImGuiCond.Once);

ImGui.setNextWindowPos(ImGui.getMainViewport().getPosX() + 100, ImGui.getMainViewport().getPosY() + 100, ImGuiCond.Once);

if (ImGui.begin("ImNodes Demo", showImNodesWindow)) {

ImGui.text("This a demo graph editor for ImNodes");

ImGui.alignTextToFramePadding();

ImGui.text("Repo:");

ImGui.sameLine();

if (ImGui.button(URL)) {

try {

Desktop.getDesktop().browse(new URI(URL));

} catch (Exception e) {

e.printStackTrace();

}

ImNodes.editorContextSet(editorContext);

ImNodes.beginNodeEditor();

for (Graph.GraphNode node : graph.nodes.values()) {

ImNodes.beginNode(node.nodeId);

ImNodes.beginNodeTitleBar();

ImGui.text(node.getName());

ImNodes.endNodeTitleBar();

ImNodes.beginInputAttribute(node.getInputPinId(), ImNodesPinShape.CircleFilled);

ImGui.text("In");

ImNodes.endInputAttribute();

ImGui.sameLine();

ImNodes.beginOutputAttribute(node.getOutputPinId());

ImGui.text("Out");

ImNodes.endOutputAttribute();

ImNodes.endNode();

}

int uniqueLinkId = 1;

for (Graph.GraphNode node : graph.nodes.values()) {

if (graph.nodes.containsKey(node.outputNodeId)) {

ImNodes.link(uniqueLinkId++, node.getOutputPinId(), graph.nodes.get(node.outputNodeId).getInputPinId());

}

final boolean isEditorHovered = ImNodes.isEditorHovered();

ImNodes.miniMap(0.2f, ImNodesMiniMapLocation.BottomRight);

ImNodes.endNodeEditor();

if (ImNodes.isLinkCreated(LINK_A, LINK_B)) {

final Graph.GraphNode source = graph.findByOutput(LINK_A.get());

final Graph.GraphNode target = graph.findByInput(LINK_B.get());

if (source != null && target != null && source.outputNodeId != target.nodeId) {

source.outputNodeId = target.nodeId;

}

if (ImGui.isMouseClicked(ImGuiMouseButton.Right)) {

final int hoveredNode = ImNodes.getHoveredNode();

if (hoveredNode != -1) {

ImGui.openPopup("node_context");

ImGui.getStateStorage().setInt(ImGui.getID("delete_node_id"), hoveredNode);

} else if (isEditorHovered) {

ImGui.openPopup("node_editor_context");

}

if (ImGui.isPopupOpen("node_context")) {

final int targetNode = ImGui.getStateStorage().getInt(ImGui.getID("delete_node_id"));

if (ImGui.beginPopup("node_context")) {

if (ImGui.button("Delete " + graph.nodes.get(targetNode).getName())) {

graph.nodes.remove(targetNode);

ImGui.closeCurrentPopup();

}

ImGui.endPopup();

}

if (ImGui.beginPopup("node_editor_context")) {

if (ImGui.button("Create New Node")) {

final Graph.GraphNode node = graph.createGraphNode();

ImNodes.setNodeScreenSpacePos(node.nodeId, ImGui.getMousePosX(), ImGui.getMousePosY());

ImGui.closeCurrentPopup();

}

ImGui.endPopup();

}

ImGui.end();

}

imgui-java/example/src/main/java/ExampleImNodes.java at main · SpaiR/imgui-java · GitHub

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