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/*
* Copyright (C) 2010 Google Inc.
*
* 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.android.inputmethod.keyboard;
import android.content.Context;
import android.content.res.Resources;
import java.util.List;
public class MiniKeyboardBuilder {
private final Resources mRes;
private final Keyboard mKeyboard;
private final CharSequence[] mPopupCharacters;
private final int mMaxColumns;
private final int mNumRows;
private int mColPos;
private int mRowPos;
private int mX;
private int mY;
public MiniKeyboardBuilder(Context context, int layoutTemplateResId, Key popupKey) {
mRes = context.getResources();
final Keyboard keyboard = new Keyboard(context, layoutTemplateResId, null);
mKeyboard = keyboard;
mPopupCharacters = popupKey.mPopupCharacters;
final int numKeys = mPopupCharacters.length;
final int maxColumns = popupKey.mMaxPopupColumn;
int numRows = numKeys / maxColumns;
if (numKeys % maxColumns != 0) numRows++;
mMaxColumns = maxColumns;
mNumRows = numRows;
keyboard.setHeight((keyboard.getRowHeight() + keyboard.getVerticalGap()) * numRows
- keyboard.getVerticalGap());
// TODO: To determine key width we should pay attention to key label length.
if (numRows > 1) {
mColPos = numKeys % maxColumns;
if (mColPos > 0) mColPos = maxColumns - mColPos;
// Centering top-row keys.
mX = mColPos * (keyboard.getKeyWidth() + keyboard.getHorizontalGap()) / 2;
}
mKeyboard.setMinWidth(0);
}
public Keyboard build() {
final Keyboard keyboard = mKeyboard;
final List<Key> keys = keyboard.getKeys();
for (CharSequence label : mPopupCharacters) {
refresh();
final Key key = new Key(mRes, keyboard, label, mX, mY, getRowFlags());
keys.add(key);
advance();
}
return keyboard;
}
private int getRowFlags() {
final int rowPos = mRowPos;
int rowFlags = 0;
if (rowPos == 0) rowFlags |= Keyboard.EDGE_TOP;
if (rowPos == mNumRows - 1) rowFlags |= Keyboard.EDGE_BOTTOM;
return rowFlags;
}
private void refresh() {
if (mColPos >= mMaxColumns) {
final Keyboard keyboard = mKeyboard;
// TODO: Allocate key position depending the precedence of popup characters.
mX = 0;
mY += keyboard.getRowHeight() + keyboard.getVerticalGap();
mColPos = 0;
mRowPos++;
}
}
private void advance() {
final Keyboard keyboard = mKeyboard;
// TODO: Allocate key position depending the precedence of popup characters.
mX += keyboard.getKeyWidth() + keyboard.getHorizontalGap();
if (mX > keyboard.getMinWidth())
keyboard.setMinWidth(mX);
mColPos++;
}
}
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