72 lines
3.1 KiB
Java
72 lines
3.1 KiB
Java
|
package eu.siacs.conversations.ui.util;
|
||
|
|
|
||
|
|
import android.content.Context;
|
||
|
|
import android.support.annotation.DimenRes;
|
||
|
|
import android.support.v7.widget.GridLayoutManager;
|
||
|
|
import android.support.v7.widget.RecyclerView;
|
||
|
|
import android.util.Log;
|
||
|
|
import android.view.ViewTreeObserver;
|
||
|
|
|
||
|
|
import eu.siacs.conversations.Config;
|
||
|
|
import eu.siacs.conversations.ui.adapter.MediaAdapter;
|
||
|
|
|
||
|
|
public class GridManager {
|
||
|
|
|
||
|
|
public static void setupLayoutManager(final Context context, RecyclerView recyclerView, @DimenRes int desiredSize) {
|
||
|
|
int maxWidth = context.getResources().getDisplayMetrics().widthPixels;
|
||
|
|
ColumnInfo columnInfo = calculateColumnCount(context, maxWidth, desiredSize);
|
||
|
|
Log.d(Config.LOGTAG, "preliminary count=" + columnInfo.count);
|
||
|
|
MediaAdapter.setMediaSize(recyclerView, columnInfo.width);
|
||
|
|
recyclerView.setLayoutManager(new GridLayoutManager(context, columnInfo.count));
|
||
|
|
recyclerView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
|
||
|
|
@Override
|
||
|
|
public void onGlobalLayout() {
|
||
|
|
recyclerView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
|
||
|
|
final ColumnInfo columnInfo = calculateColumnCount(context, recyclerView.getMeasuredWidth(), desiredSize);
|
||
|
|
Log.d(Config.LOGTAG, "final count " + columnInfo.count);
|
||
|
|
if (recyclerView.getAdapter().getItemCount() != 0) {
|
||
|
|
Log.e(Config.LOGTAG, "adapter already has items; just go with it now");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
setupLayoutManagerInternal(recyclerView, columnInfo);
|
||
|
|
MediaAdapter.setMediaSize(recyclerView, columnInfo.width);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
private static void setupLayoutManagerInternal(RecyclerView recyclerView, final ColumnInfo columnInfo) {
|
||
|
|
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
|
||
|
|
if (layoutManager instanceof GridLayoutManager) {
|
||
|
|
((GridLayoutManager) layoutManager).setSpanCount(columnInfo.count);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private static ColumnInfo calculateColumnCount(Context context, int availableWidth, @DimenRes int desiredSize) {
|
||
|
|
final float desiredWidth = context.getResources().getDimension(desiredSize);
|
||
|
|
final int columns = Math.round(availableWidth / desiredWidth);
|
||
|
|
final int realWidth = availableWidth / columns;
|
||
|
|
Log.d(Config.LOGTAG, "desired=" + desiredWidth + " real=" + realWidth);
|
||
|
|
return new ColumnInfo(columns, realWidth);
|
||
|
|
}
|
||
|
|
|
||
|
|
public static int getCurrentColumnCount(RecyclerView recyclerView) {
|
||
|
|
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
|
||
|
|
if (layoutManager instanceof GridLayoutManager) {
|
||
|
|
return ((GridLayoutManager) layoutManager).getSpanCount();
|
||
|
|
} else {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public static class ColumnInfo {
|
||
|
|
private final int count;
|
||
|
|
private final int width;
|
||
|
|
|
||
|
|
private ColumnInfo(int count, int width) {
|
||
|
|
this.count = count;
|
||
|
|
this.width = width;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|