com.gwtm.ui.client.widgets.FlowGridPanel2.java Source code

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Here is the source code for com.gwtm.ui.client.widgets.FlowGridPanel2.java

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/*
 * Copyright (c) 2011 Zhihua (Dennis) Jiang
 * 
 * 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.gwtm.ui.client.widgets;

import java.beans.Beans;

import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.event.logical.shared.ResizeEvent;
import com.google.gwt.event.logical.shared.ResizeHandler;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.SimplePanel;
import com.google.gwt.user.client.ui.Widget;
import com.gwtm.ui.client.core.Utils;
import com.gwtm.ui.client.core.widgets.PanelBase;
import com.gwtm.ui.client.themes.ThemeManager;

public class FlowGridPanel2 extends PanelBase implements ResizeHandler {

    public enum Columns {
        One(1), Two(2), Three(3), Four(4), Five(5), Six(6), Seven(7), Eight(8);
        private int col;

        private Columns(int col) {
            this.col = col;
        }

        public int getColNumber() {
            return this.col;
        }
    };

    private Columns portraitColumns = Columns.Four;
    private Columns landscapeColumns = Columns.Four;
    private int calculatedWidth;

    public FlowGridPanel2() {
        Utils.Widgets.setPrimaryCssClass(this, ThemeManager.getTheme().flowgridpanel());

        if (Beans.isDesignTime()) {
            calculateCellWidth(FlowGridPanel2.this);
            updateUi(FlowGridPanel2.this);
        }

        Scheduler.get().scheduleDeferred(new ScheduledCommand() {

            @Override
            public void execute() {
                calculateCellWidth(FlowGridPanel2.this);
                updateUi(FlowGridPanel2.this);
            }
        });

    }

    @Override
    public void onLoad() {
        Window.addResizeHandler(this);
    }

    @Override
    public void add(Widget w) {
        super.add(new SimplePanel(w));
    }

    private static void calculateCellWidth(FlowGridPanel2 panel) {
        //int width = RootPanel.get().getOffsetWidth() - panel.getElement().getAbsoluteLeft() - panel.getElement().getAbsoluteRight();
        int width = panel.getElement().getOffsetWidth();// panel.getElement().getClientWidth();
        if (width == 0)
            width = RootPanel.get().getOffsetWidth() - panel.getElement().getAbsoluteLeft()
                    - panel.getElement().getAbsoluteRight();

        int numCols = Utils.DeviceInfo.isLandscape() ? panel.getLandscapeColumns().getColNumber()
                : panel.getPortraitColumns().getColNumber();

        panel.calculatedWidth = width / numCols;

    }

    private static void updateUi(FlowGridPanel2 panel) {

        int width = panel.getElement().getClientWidth();
        if (width == 0)
            width = RootPanel.get().getOffsetWidth() - panel.getElement().getAbsoluteLeft()
                    - panel.getElement().getAbsoluteRight();

        int numCols = Utils.DeviceInfo.isLandscape() ? panel.getLandscapeColumns().getColNumber()
                : panel.getPortraitColumns().getColNumber();

        panel.calculatedWidth = width / numCols;

        panel.calculatedWidth = panel.calculatedWidth; // reduce 30px and give all to the padding on the parent
        if (width < 0)
            return;
        for (int i = 0; i < panel.getWidgetCount(); i++) {
            Widget w = panel.getWidget(i);
            w.setWidth(panel.calculatedWidth + "px");
            w.setHeight(panel.calculatedWidth + "px");
        }

    }

    public Columns getPortraitColumns() {
        return portraitColumns;
    }

    public void setPortraitColumns(Columns portraitColumns) {
        this.portraitColumns = portraitColumns;
        updateUi(this);
    }

    public Columns getLandscapeColumns() {
        return landscapeColumns;
    }

    public void setLandscapeColumns(Columns landscapeColumns) {
        this.landscapeColumns = landscapeColumns;
        updateUi(this);
    }

    //   private void updateUi2() {
    //      if (getWidgetCount() == 0) return;
    //      
    //      int colls = 1;
    //      if (Utils.DeviceInfo.isPortrait())
    //         colls = getPortraitColumns().getColNumber();
    //      if (Utils.DeviceInfo.isLandscape())
    //         colls = getLandscapeColumns().getColNumber();
    //      
    //      int colWidthValue = (int)((100 / (double)colls)-7);
    //      String colWidth = colWidthValue+"%";
    //      
    //      // calculate the number of rows
    //      int rows = (int) Math.ceil((double)getWidgetCount() / (double)colls);
    //      //int rows = (int)(getWidgetCount() / colls);
    //      if (rows == 0) rows = 1;
    ////      if (getWidgetCount() > (colls*rows))
    ////         rows++; 
    //      
    //      int capMax = colls*rows;
    //      
    //      int remainingCells = capMax - getWidgetCount();
    //      
    //      Utils.Console("dg: " + colls + " / " + rows + " ( max:"+ capMax+") - (count: " + getWidgetCount() + ") (remaining: " + remainingCells + ")- mode: " + Utils.DeviceInfo.isPortrait());
    ////      super.clear();
    //
    //   }

    @Override
    public void onResize(ResizeEvent event) {
        calculateCellWidth(FlowGridPanel2.this);
        updateUi(FlowGridPanel2.this);
    }

}