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Closes #17. Added support for STL files
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143
app/src/main/java/org/andresoviedo/app/model3D/controller/LoaderTask.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| package org.andresoviedo.app.model3D.controller; | ||
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| import android.app.Activity; | ||
| import android.app.ProgressDialog; | ||
| import android.os.AsyncTask; | ||
| import android.util.Log; | ||
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| import org.andresoviedo.app.model3D.model.Object3DBuilder; | ||
| import org.andresoviedo.app.model3D.model.Object3DData; | ||
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| import java.io.File; | ||
| import java.io.FileInputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.net.URL; | ||
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| /** | ||
| * This component allows loading the model without blocking the UI. | ||
| * | ||
| * @author andresoviedo | ||
| */ | ||
| public abstract class LoaderTask extends AsyncTask<Void, Integer, Object3DData> { | ||
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| /** | ||
| * URL to the 3D model | ||
| */ | ||
| protected final URL url; | ||
| /** | ||
| * Callback to notify of events | ||
| */ | ||
| protected final Object3DBuilder.Callback callback; | ||
| /** | ||
| * The dialog that will show the progress of the loading | ||
| */ | ||
| protected final ProgressDialog dialog; | ||
| /** | ||
| * The parent activity | ||
| */ | ||
| private final Activity parent; | ||
| /** | ||
| * Directory where the model is located (null when its loaded from asset) | ||
| */ | ||
| private final File currentDir; | ||
| /** | ||
| * Asset directory where the model is loaded (null when its loaded from the filesystem) | ||
| */ | ||
| private final String assetsDir; | ||
| /** | ||
| * Id of the data being loaded | ||
| */ | ||
| private final String modelId; | ||
| /** | ||
| * Exception when loading data (if any) | ||
| */ | ||
| protected Exception error; | ||
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| /** | ||
| * Build a new progress dialog for loading the data model asynchronously | ||
| * | ||
| * @param url the URL pointing to the 3d model | ||
| * @param currentDir the directory where the model is located (null when the model is an asset) | ||
| * @param modelId the id the data being loaded | ||
| */ | ||
| public LoaderTask(Activity parent, URL url, File currentDir, String assetsDir, String modelId, Object3DBuilder.Callback callback) { | ||
| this.parent = parent; | ||
| this.url = url; | ||
| this.currentDir = currentDir; | ||
| this.assetsDir = assetsDir; | ||
| this.modelId = modelId; | ||
| this.dialog = new ProgressDialog(parent); | ||
| this.callback = callback; | ||
| } | ||
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| @Override | ||
| protected void onPreExecute() { | ||
| super.onPreExecute(); | ||
| // this.dialog = ProgressDialog.show(this.parent, "Please wait ...", "Loading model data...", true); | ||
| // this.dialog.setTitle(modelId); | ||
| this.dialog.setMessage("Loading..."); | ||
| this.dialog.setCancelable(false); | ||
| this.dialog.show(); | ||
| } | ||
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| @Override | ||
| protected Object3DData doInBackground(Void... params) { | ||
| try { | ||
| Object3DData data = build(); | ||
| callback.onLoadComplete(data); | ||
| build(data); | ||
| return data; | ||
| } catch (Exception ex) { | ||
| error = ex; | ||
| return null; | ||
| } | ||
| } | ||
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| protected abstract Object3DData build() throws Exception; | ||
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| protected abstract void build(Object3DData data) throws Exception; | ||
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| @Override | ||
| protected void onProgressUpdate(Integer... values) { | ||
| super.onProgressUpdate(values); | ||
| switch (values[0]) { | ||
| case 0: | ||
| this.dialog.setMessage("Analyzing model..."); | ||
| break; | ||
| case 1: | ||
| this.dialog.setMessage("Allocating memory..."); | ||
| break; | ||
| case 2: | ||
| this.dialog.setMessage("Loading data..."); | ||
| break; | ||
| case 3: | ||
| this.dialog.setMessage("Scaling object..."); | ||
| break; | ||
| case 4: | ||
| this.dialog.setMessage("Building 3D model..."); | ||
| break; | ||
| case 5: | ||
| // Toast.makeText(parent, modelId + " Build!", Toast.LENGTH_LONG).show(); | ||
| break; | ||
| } | ||
| } | ||
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| @Override | ||
| protected void onPostExecute(Object3DData data) { | ||
| super.onPostExecute(data); | ||
| if (dialog.isShowing()) { | ||
| dialog.dismiss(); | ||
| } | ||
| if (error != null) { | ||
| callback.onLoadError(error); | ||
| } else { | ||
| callback.onBuildComplete(data); | ||
| } | ||
| } | ||
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| } |
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