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KeyboardSelectorView.java
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KeyboardSelectorView.java
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package org.mozilla.vrbrowser.ui.views;
import android.content.Context;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.widget.FrameLayout;
import android.widget.GridLayout;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import org.mozilla.vrbrowser.R;
import org.mozilla.vrbrowser.ui.widgets.WidgetPlacement;
import java.util.ArrayList;
import java.util.List;
public class KeyboardSelectorView extends FrameLayout {
public static class Item {
public final String title;
public final Object tag;
public Item(String aTitle, Object aTag) {
this.title = aTitle;
this.tag = aTag;
}
}
public interface Delegate {
void onItemClick(Item aItem);
}
private GridLayout mLangRowContainer;
private Delegate mDelegate;
private List<Item> mItems;
private List<UITextButton> mButtons = new ArrayList<>();
private int mDomainColItemWidth;
private int mNarrowColItemWidth;
private int mWideColItemWidth;
private static final int kMaxItemsPerColumn = 4;
public KeyboardSelectorView(@NonNull Context context) {
super(context);
initialize();
}
public KeyboardSelectorView(@NonNull Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
initialize();
}
public KeyboardSelectorView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initialize();
}
private void initialize() {
inflate(getContext(), R.layout.language_selection, this);
mLangRowContainer = findViewById(R.id.langRowContainer);
mDomainColItemWidth = WidgetPlacement.pixelDimension(getContext(), R.dimen.lang_selector_domain_col_item_width);
mNarrowColItemWidth = WidgetPlacement.pixelDimension(getContext(), R.dimen.lang_selector_narrow_col_item_width);
mWideColItemWidth = WidgetPlacement.pixelDimension(getContext(), R.dimen.lang_selector_wide_col_item_width);
}
public void setDelegate(Delegate aDelegate) {
mDelegate = aDelegate;
}
public void setItems(List<Item> aItems) {
mItems = aItems;
mLangRowContainer.removeAllViews();
mButtons.clear();
int columns = (aItems.size() / kMaxItemsPerColumn) + 1;
int rows = aItems.size() < kMaxItemsPerColumn ? aItems.size() : kMaxItemsPerColumn;
mLangRowContainer.setColumnCount(columns);
mLangRowContainer.setRowCount(rows);
int[] columnWidth = new int[columns];
for (int i=0; i<aItems.size(); i++) {
GridLayout.LayoutParams params = new GridLayout.LayoutParams();
params.width = GridLayout.LayoutParams.WRAP_CONTENT;
UITextButton button = createItemButton(aItems.get(i));
int padding = button.getPaddingStart() + button.getPaddingEnd();
float textWidth = button.getPaint().measureText(aItems.get(i).title) + padding;
int column = i/kMaxItemsPerColumn;
int width;
if (textWidth < mDomainColItemWidth) {
width = mDomainColItemWidth;
} else if (textWidth < mNarrowColItemWidth) {
width = mNarrowColItemWidth;
} else {
width = mWideColItemWidth;
}
if (columnWidth[column] < width) {
columnWidth[column] = width;
}
mLangRowContainer.addView(button, params);
mButtons.add(button);
}
// Assign widest row width to the whole column rows
for (int i=0; i<aItems.size(); i++) {
int column = i/kMaxItemsPerColumn;
UITextButton button = (UITextButton)mLangRowContainer.getChildAt(i);
button.getLayoutParams().width = columnWidth[column];
}
}
public void setSelectedItem(Object aTag) {
for (UITextButton button: mButtons) {
Item item = (Item) button.getTag();
button.setSelected(item.tag == aTag);
}
}
public List<Item> getItems() {
return mItems;
}
private OnClickListener clickHandler = v -> {
UITextButton button = (UITextButton) v;
if (mDelegate != null) {
mDelegate.onItemClick((Item)button.getTag());
}
};
private UITextButton createItemButton(Item aItem) {
UITextButton button = new UITextButton(getContext());
button.setTintColorList(R.drawable.lang_selector_button_color);
button.setBackground(getContext().getDrawable(R.drawable.lang_selector_button_background));
button.setOnClickListener(clickHandler);
button.setPadding(13, 13, 13, 13);
button.setIncludeFontPadding(false);
button.setTextSize(TypedValue.COMPLEX_UNIT_SP, 13);
button.setText(aItem.title);
button.setTextAlignment(TEXT_ALIGNMENT_VIEW_START);
button.setTag(aItem);
return button;
}
}