/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * 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.android.ide.eclipse.hierarchyviewer.views;

import com.android.ddmuilib.ImageLoader;
import com.android.hierarchyviewerlib.HierarchyViewerDirector;
import com.android.hierarchyviewerlib.actions.PixelPerfectAutoRefreshAction;
import com.android.hierarchyviewerlib.models.PixelPerfectModel;
import com.android.hierarchyviewerlib.models.PixelPerfectModel.IImageChangeListener;
import com.android.hierarchyviewerlib.ui.PixelPerfectControls;
import com.android.hierarchyviewerlib.ui.PixelPerfectLoupe;
import com.android.hierarchyviewerlib.ui.PixelPerfectPixelPanel;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.part.ViewPart;

public class PixelPerfectLoupeView extends ViewPart implements IImageChangeListener {

    public static final String ID =
            "com.android.ide.eclipse.hierarchyviewer.views.PixelPerfectLoupeView"; //$NON-NLS-1$

    private PixelPerfectLoupe mPixelPerfectLoupe;

    private Action mShowInLoupeAction = new Action("&Show Overlay", Action.AS_CHECK_BOX) {
        @Override
        public void run() {
            mPixelPerfectLoupe.setShowOverlay(isChecked());
        }
    };
    @Override
    public void createPartControl(Composite parent) {
        mShowInLoupeAction.setAccelerator(SWT.MOD1 + 'S');
        ImageLoader imageLoader = ImageLoader.getLoader(HierarchyViewerDirector.class);
        Image image = imageLoader.loadImage("show-overlay.png", Display.getDefault()); //$NON-NLS-1$
        mShowInLoupeAction.setImageDescriptor(ImageDescriptor.createFromImage(image));
        mShowInLoupeAction.setToolTipText("Show the overlay in the loupe view");
        mShowInLoupeAction.setEnabled(PixelPerfectModel.getModel().getOverlayImage() != null);
        PixelPerfectModel.getModel().addImageChangeListener(this);

        GridLayout loupeLayout = new GridLayout();
        loupeLayout.marginWidth = loupeLayout.marginHeight = 0;
        loupeLayout.horizontalSpacing = loupeLayout.verticalSpacing = 0;
        parent.setLayout(loupeLayout);

        Composite pixelPerfectLoupeBorder = new Composite(parent, SWT.BORDER);
        pixelPerfectLoupeBorder.setLayoutData(new GridData(GridData.FILL_BOTH));
        GridLayout pixelPerfectLoupeBorderGridLayout = new GridLayout();
        pixelPerfectLoupeBorderGridLayout.marginWidth =
                pixelPerfectLoupeBorderGridLayout.marginHeight = 0;
        pixelPerfectLoupeBorderGridLayout.horizontalSpacing =
                pixelPerfectLoupeBorderGridLayout.verticalSpacing = 0;
        pixelPerfectLoupeBorder.setLayout(pixelPerfectLoupeBorderGridLayout);

        mPixelPerfectLoupe = new PixelPerfectLoupe(pixelPerfectLoupeBorder);
        mPixelPerfectLoupe.setLayoutData(new GridData(GridData.FILL_BOTH));

        PixelPerfectPixelPanel pixelPerfectPixelPanel =
                new PixelPerfectPixelPanel(pixelPerfectLoupeBorder);
        pixelPerfectPixelPanel.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

        // https://code.google.com/p/android/issues/detail?id=69199
        // Disabled until accessibility issues are fixed
        // PixelPerfectControls pixelPerfectControls =
        //         new PixelPerfectControls(parent);
        // pixelPerfectControls.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

        placeActions();
    }

    private void placeActions() {
        IActionBars actionBars = getViewSite().getActionBars();

        IMenuManager mm = actionBars.getMenuManager();
        mm.removeAll();
        mm.add(PixelPerfectAutoRefreshAction.getAction());
        mm.add(mShowInLoupeAction);

        IToolBarManager tm = actionBars.getToolBarManager();
        tm.removeAll();
        tm.add(PixelPerfectAutoRefreshAction.getAction());
        tm.add(mShowInLoupeAction);
    }

    @Override
    public void dispose() {
        super.dispose();
        PixelPerfectModel.getModel().removeImageChangeListener(this);
    }

    @Override
    public void setFocus() {
        mPixelPerfectLoupe.setFocus();
    }

    @Override
    public void crosshairMoved() {
        // pass
    }

    @Override
    public void treeChanged() {
        // pass
    }

    @Override
    public void imageChanged() {
        // pass
    }

    @Override
    public void imageLoaded() {
        Display.getDefault().syncExec(new Runnable() {
            @Override
            public void run() {
                Image overlayImage = PixelPerfectModel.getModel().getOverlayImage();
                mShowInLoupeAction.setEnabled(overlayImage != null);
            }
        });
    }

    @Override
    public void overlayChanged() {
        Display.getDefault().syncExec(new Runnable() {
            @Override
            public void run() {
                mShowInLoupeAction
                        .setEnabled(PixelPerfectModel.getModel().getOverlayImage() != null);
            }
        });
    }

    @Override
    public void overlayTransparencyChanged() {
        // pass
    }

    @Override
    public void selectionChanged() {
        // pass
    }

    @Override
    public void zoomChanged() {
        // pass
    }

}