Start of work on logic stuff

core/src/mindustry/logic/LogicCanvas.java

@@ -0,0 +1,174 @@
+package mindustry.logic;
+
+import arc.*;
+import arc.graphics.*;
+import arc.graphics.g2d.*;
+import arc.input.*;
+import arc.math.geom.*;
+import arc.scene.event.*;
+import arc.scene.ui.*;
+import arc.scene.ui.layout.*;
+import arc.struct.*;
+import arc.util.*;
+import mindustry.gen.*;
+import mindustry.graphics.*;
+import mindustry.ui.*;
+
+public class LogicCanvas extends WidgetGroup{
+    private static final Color backgroundCol = Color.black, gridCol = Pal.accent.cpy().mul(0.2f);
+
+    private Seq<LogicNode> nodes = new Seq<>();
+
+    {
+        LogicElement e = new LogicElement();
+        e.setPosition(Core.graphics.getWidth()/2f, Core.graphics.getHeight()/2f);
+        addChild(e);
+        e.pack();
+    }
+
+    @Override
+    public void draw(){
+        Draw.color(backgroundCol);
+
+        Fill.crect(x, y, width, height);
+
+        Draw.color(gridCol);
+
+        float spacing = Scl.scl(50f);
+        int xbars = (int)(width / spacing) + 1, ybars = (int)(width / spacing) + 1;
+
+        Lines.stroke(Scl.scl(3f));
+
+        for(int i = 0; i < xbars; i++){
+            float cx = x + width/2f + (i - xbars/2) * spacing;
+            Lines.line(cx, y, cx, y + height);
+        }
+
+        for(int i = 0; i < ybars; i++){
+            float cy = y + height/2f + (i - ybars/2) * spacing;
+            Lines.line(0, cy, x + width, cy);
+        }
+
+        Draw.reset();
+
+        super.draw();
+    }
+
+    static class LogicElement extends Table{
+        LogicNode node;
+        NodeField[] fields = {new NodeField(true, "input 1"), new NodeField(true, "input 2"), new NodeField(false, "output 1"), new NodeField(false, "output 2")};
+
+        LogicElement(){
+            background(Tex.whitePane);
+            setColor(Pal.accent.cpy().mul(0.9f).shiftSaturation(-0.3f));
+            touchable = Touchable.enabled;
+
+            margin(0f);
+
+            table(Tex.whiteui, t -> {
+                t.update(() -> {
+                    t.setColor(color);
+                });
+
+                t.margin(8f);
+
+                t.add("Node").style(Styles.outlineLabel).color(color);
+                t.add().growX();
+                t.button(Icon.cancel, Styles.onlyi, () -> {
+
+                });
+            }).growX().padBottom(5);
+
+            row();
+
+            defaults().size(190, 36);
+
+            for(NodeField field : fields){
+                add(field).color(color);
+                row();
+            }
+
+            marginBottom(5);
+
+            addListener(new InputListener(){
+                float lastx, lasty;
+
+                @Override
+                public boolean touchDown(InputEvent event, float x, float y, int pointer, KeyCode button){
+                    Vec2 v = localToStageCoordinates(Tmp.v1.set(x, y));
+                    lastx = v.x;
+                    lasty = v.y;
+                    toFront();
+                    return true;
+                }
+
+                @Override
+                public void touchDragged(InputEvent event, float x, float y, int pointer){
+                    Vec2 v = localToStageCoordinates(Tmp.v1.set(x, y));
+
+                    moveBy(v.x - lastx, v.y - lasty);
+                    lastx = v.x;
+                    lasty = v.y;
+                }
+            });
+        }
+
+        @Override
+        public void draw(){
+            float pad = 10f;
+            Fill.dropShadow(x + width/2f, y + height/2f, width + pad, height + pad, 20f, 0.95f);
+
+            Draw.color(0, 0, 0, 0.3f);
+            Fill.crect(x, y, width, height);
+            Draw.reset();
+
+            super.draw();
+        }
+    }
+
+    static class NodeField extends Table{
+        boolean input;
+        ImageButton button;
+
+        NodeField(boolean input, String name){
+            this.input = input;
+            if(input){
+                addIcon();
+                left();
+            }else{
+                right();
+            }
+
+            add(name).padLeft(5).padRight(5).style(Styles.outlineLabel);
+
+            if(!input){
+                addIcon();
+            }
+        }
+
+        void addIcon(){
+            float s = 30f;
+            Cell<ImageButton> c = button(Tex.logicNode, Styles.colori, () -> {
+
+            }).size(s);
+
+            button = c.get();
+            c.update(i -> i.getStyle().imageUpColor = color);
+
+            float pad = s/2f - 3f;
+
+            if(input){
+                c.padLeft(-pad);
+            }else{
+                c.padRight(-pad);
+            }
+        }
+
+        @Override
+        public void setColor(Color color){
+            super.setColor(color);
+
+            button.getStyle().imageUpColor = color;
+        }
+    }
+}