com.kotcrab.vis.editor.module.scene.RectangularSelection.java Source code

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Here is the source code for com.kotcrab.vis.editor.module.scene.RectangularSelection.java

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/*
 * Copyright 2014-2015 See AUTHORS file.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.kotcrab.vis.editor.module.scene;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input.Buttons;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer.ShapeType;
import com.badlogic.gdx.math.Rectangle;
import com.badlogic.gdx.utils.Array;
import com.kotcrab.vis.editor.scene.EditorObject;

public class RectangularSelection {
    private Array<EditorObject> entities;
    private EntityManipulatorModule entityManipulatorModule;

    private Rectangle currentRect = null;
    private Rectangle rectToDraw = null;

    public RectangularSelection(Array<EditorObject> entities, EntityManipulatorModule entityManipulatorModule) {
        this.entities = entities;
        this.entityManipulatorModule = entityManipulatorModule;
    }

    public void render(ShapeRenderer shapeRenderer) {
        if (rectToDraw != null) {
            Gdx.gl20.glEnable(GL20.GL_BLEND);

            shapeRenderer.setColor(0.11f, 0.63f, 0.89f, 1);
            shapeRenderer.begin(ShapeType.Line);
            shapeRenderer.rect(rectToDraw.getX(), rectToDraw.getY(), rectToDraw.getWidth(), rectToDraw.getHeight());
            shapeRenderer.end();

            shapeRenderer.setColor(0.05f, 0.33f, 0.49f, 0.3f);
            shapeRenderer.begin(ShapeType.Filled);
            shapeRenderer.rect(rectToDraw.getX(), rectToDraw.getY(), rectToDraw.getWidth(), rectToDraw.getHeight());
            shapeRenderer.end();
        }
    }

    public void findContainedComponents() {
        Array<EditorObject> matchingEntities = new Array<>();

        for (EditorObject entity : entities)
            if (rectToDraw.contains(entity.getBoundingRectangle()))
                matchingEntities.add(entity);

        entityManipulatorModule.resetSelection();
        matchingEntities.forEach(entityManipulatorModule::selectAppend);
    }

    public boolean touchDown(float x, float y, int button) {
        if (button == Buttons.LEFT) {
            currentRect = new Rectangle(x, y, 0, 0);
            updateDrawableRect();
            return true;
        }

        return false;
    }

    public boolean touchDragged(float x, float y) {
        if (currentRect != null) {
            currentRect.setSize(x - currentRect.x, y - currentRect.y);
            updateDrawableRect();
            return true;
        }

        return false;
    }

    public void touchUp() {
        if (rectToDraw != null)
            findContainedComponents();

        rectToDraw = null;
        currentRect = null;
    }

    private void updateDrawableRect() {
        float x = currentRect.x;
        float y = currentRect.y;
        float width = currentRect.width;
        float height = currentRect.height;

        // Make the width and height positive, if necessary.
        if (width < 0) {
            width = 0 - width;
            x = x - width + 1;
        }

        if (height < 0) {
            height = 0 - height;
            y = y - height + 1;
        }

        // Update rectToDraw after saving old value.
        if (rectToDraw != null)
            rectToDraw.set(x, y, width, height);
        else
            rectToDraw = new Rectangle(x, y, width, height);

    }
}