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Code Quality Rank: L5
Programming language: Java
Tags: Other Widget    
Latest version: v1.9

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README

Draggable Panel

Draggable Panel is an Android library created to build a draggable user interface similar to the new YouTube draggable video component based on Fragments or Views.

This Android library offers you two main classes to use and create your own awesome user interfaces. If you want to use it with fragments add DraggablePanel to your layout. If you want to use it with views use DraggableView and put your views inside.

This new component has been created using some concepts described on Flavien Laurent Blog and Denevell Blog.

To create this library I've used an Android component called ViewDragHelper and ViewDragHelper.Calback. This component doesn't have too much documentation and that's the reason why I've added some javadoc to my code in order to clarify the component usage.

This library works on Android 4.X because the scale effect is not going to work properly when the user try to drag the view. The clickable zone on a scaled view in Android 2.X is bigger than the real scaled zone.

Screenshots

[Demo Screenshot 1][5] [Demo Screenshot 2][6] [Demo Screenshot 4][7] [Demo Screenshot 3][8]

Usage

To use Draggable Panel library and get your new awesome UI working you can use two different Android widgets:

  • 1. Add DraggablePanel widget to your layout. Configure the view customization elements using styleable attributes or programatically and configure your fragments to work as top or bottom fragment inside the DraggablePanel widget.
<com.github.pedrovgs.DraggablePanel
        android:id="@+id/draggable_panel"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"/>

private void initializeDraggablePanel() throws Resources.NotFoundException {
      draggablePanel.setFragmentManager(getSupportFragmentManager());
      draggablePanel.setTopFragment(placeFragment);
      draggablePanel.setBottomFragment(mapFragment);
      draggablePanel.initializeView();
}
  • 2. Add DraggableView widget to your layout. Configure the view to use two children views as the draggable view and the second view. Configure the customization elements using styleable attributes or programatically.
<com.github.pedrovgs.DraggableView
          xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:draggable_view="http://schemas.android.com/apk/res-auto"
          android:id="@+id/draggable_view"
          android:layout_width="fill_parent"
          android:layout_height="fill_parent"
          draggable_view:top_view_id="@+id/iv_fan_art"
          draggable_view:bottom_view_id="@+id/lv_episodes"
          draggable_view:top_view_x_scale_factor="@dimen/x_scale_factor"
          draggable_view:top_view_y_scale_factor="@dimen/y_scale_factor"
          draggable_view:top_view_margin_right="@dimen/top_fragment_margin"
          draggable_view:top_view_margin_bottom="@dimen/top_fragment_margin"
          android:background="@color/black">

      <!-- ListView Episodes -->

      <ListView
              android:id="@+id/lv_episodes"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:layout_below="@+id/iv_fan_art"
              style="@style/episodes_list_view"/>

      <!-- TvShow Fan Art -->

      <ImageView
              android:id="@+id/iv_fan_art"
              android:layout_width="fill_parent"
              android:layout_height="@dimen/tv_show_fan_art_height"
              android:layout_alignParentTop="true"
              style="@style/image_view"/>

</com.github.pedrovgs.DraggableView>

Import DraggablePanel dependency

Download the project, compile it using maven or gradle and import draggablepanel-1.2.aar into your project.

Or declare it into your pom.xml. This library uses NineOldAndroid library and Android support library v4 version 19.1.0, you have to provide this dependencies from your local artifact repository or from maven central repository.

<dependency>
  <groupId>com.github.pedrovgs</groupId>
  <artifactId>draggablepanel</artifactId>
  <version>1.2</version>
  <type>aar</type>
</dependency>

Or into your build.gradle

dependencies {
    compile 'com.github.pedrovgs:draggablepanel:[email protected]'
    compile 'com.android.support:support-v4:19.1.+'
    compile 'com.nineoldandroids:library:2.4.+'
}

Customization

You can customize some of the view effects programatically or using xml styleable attributes. The elements to customize are:

  • Draggable view / fragment height.
  • Draggable view X scale factor.
  • Draggable view Y scale factor.
  • Draggable view margin right applied when the view is minimized.
  • Draggable view margin bottom applied when the view is minimized.
  • Enable or disable the horizontal alpha effect applied while the view is being horizontally dragged.
<com.github.pedrovgs.DraggableView
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:draggable_view="http://schemas.android.com/apk/res-auto"
        android:id="@+id/draggable_view"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        draggable_view:top_view_id="@+id/iv_fan_art"
        draggable_view:bottom_view_id="@+id/lv_episodes"
        draggable_view:top_view_x_scale_factor="@dimen/x_scale_factor"
        draggable_view:top_view_y_scale_factor="@dimen/y_scale_factor"
        draggable_view:top_view_margin_right="@dimen/top_fragment_margin"
        draggable_view:top_view_margin_bottom="@dimen/top_fragment_margin"
        android:background="@color/black">

        <!-- ....... -->

</com.github.pedrovgs.DraggableView>

draggablePanel.setTopFragment(placeFragment);
draggablePanel.setBottomFragment(mapFragment);
draggablePanel.setXScaleFactor(xScaleFactor);
draggablePanel.setYScaleFactor(yScaleFactor);
draggablePanel.setTopViewHeight(topViewHeight);
draggablePanel.setTopFragmentMarginRight(topViewMarginRight);
draggablePanel.setTopFragmentMarginBottom(topViewMargnBottom);

Similar customizable attributes are available programatically or using styleable attributes in DraggableView.

Do you want to resize the top view instead of scale it? Add dragable_view:top_view_resize attribute to your DraggableView:

<com.github.pedrovgs.DraggableView
            xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:draggable_view="http://schemas.android.com/apk/res-auto"
            android:id="@+id/draggable_view"
            draggable_view:top_view_resize="true">

Do you want to contribute? TODO

  • Support Android Studio / IntelliJ layout preview mode.
  • Add Travis CI support wity .travis.yml file.

Developed By

Who's using it

*Does your app use DraggablePanel? If you want to be featured on this list tell me on Twitter

Libraries used on the sample project

License

Copyright 2014 Pedro Vicente Gómez Sánchez

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.


*Note that all licence references and agreements mentioned in the DraggablePanel README section above are relevant to that project's source code only.