diff options
Diffstat (limited to 'com_actionbarsherlock/src/com/actionbarsherlock/internal/widget/IcsSpinner.java')
| -rw-r--r-- | com_actionbarsherlock/src/com/actionbarsherlock/internal/widget/IcsSpinner.java | 699 |
1 files changed, 699 insertions, 0 deletions
diff --git a/com_actionbarsherlock/src/com/actionbarsherlock/internal/widget/IcsSpinner.java b/com_actionbarsherlock/src/com/actionbarsherlock/internal/widget/IcsSpinner.java new file mode 100644 index 000000000..319c9ab83 --- /dev/null +++ b/com_actionbarsherlock/src/com/actionbarsherlock/internal/widget/IcsSpinner.java @@ -0,0 +1,699 @@ +/* + * Copyright (C) 2007 The Android Open Source Project + * + * 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.actionbarsherlock.internal.widget; + +import static android.view.ViewGroup.LayoutParams.MATCH_PARENT; +import static android.view.ViewGroup.LayoutParams.WRAP_CONTENT; +import com.actionbarsherlock.R; +import android.content.Context; +import android.content.DialogInterface; +import android.content.DialogInterface.OnClickListener; +import android.content.res.TypedArray; +import android.database.DataSetObserver; +import android.graphics.Rect; +import android.graphics.drawable.Drawable; +import android.util.AttributeSet; +import android.view.Gravity; +import android.view.View; +import android.view.ViewGroup; +import android.widget.AdapterView; +import android.widget.AdapterView.OnItemClickListener; +import android.widget.ListAdapter; +import android.widget.ListView; +import android.widget.PopupWindow; +import android.widget.SpinnerAdapter; + + +/** + * A view that displays one child at a time and lets the user pick among them. + * The items in the Spinner come from the {@link Adapter} associated with + * this view. + * + * <p>See the <a href="{@docRoot}resources/tutorials/views/hello-spinner.html">Spinner + * tutorial</a>.</p> + * + * @attr ref android.R.styleable#Spinner_prompt + */ +public class IcsSpinner extends IcsAbsSpinner implements OnClickListener { + //private static final String TAG = "Spinner"; + + // Only measure this many items to get a decent max width. + private static final int MAX_ITEMS_MEASURED = 15; + + /** + * Use a dialog window for selecting spinner options. + */ + //public static final int MODE_DIALOG = 0; + + /** + * Use a dropdown anchored to the Spinner for selecting spinner options. + */ + public static final int MODE_DROPDOWN = 1; + + /** + * Use the theme-supplied value to select the dropdown mode. + */ + //private static final int MODE_THEME = -1; + + private SpinnerPopup mPopup; + private DropDownAdapter mTempAdapter; + int mDropDownWidth; + + private int mGravity; + private boolean mDisableChildrenWhenDisabled; + + private Rect mTempRect = new Rect(); + + /** + * Construct a new spinner with the given context's theme, the supplied attribute set, + * and default style. + * + * @param context The Context the view is running in, through which it can + * access the current theme, resources, etc. + * @param attrs The attributes of the XML tag that is inflating the view. + * @param defStyle The default style to apply to this view. If 0, no style + * will be applied (beyond what is included in the theme). This may + * either be an attribute resource, whose value will be retrieved + * from the current theme, or an explicit style resource. + */ + public IcsSpinner(Context context, AttributeSet attrs, int defStyle) { + super(context, attrs, defStyle); + + TypedArray a = context.obtainStyledAttributes(attrs, + R.styleable.SherlockSpinner, defStyle, 0); + + + DropdownPopup popup = new DropdownPopup(context, attrs, defStyle); + + mDropDownWidth = a.getLayoutDimension( + R.styleable.SherlockSpinner_android_dropDownWidth, + ViewGroup.LayoutParams.WRAP_CONTENT); + popup.setBackgroundDrawable(a.getDrawable( + R.styleable.SherlockSpinner_android_popupBackground)); + final int verticalOffset = a.getDimensionPixelOffset( + R.styleable.SherlockSpinner_android_dropDownVerticalOffset, 0); + if (verticalOffset != 0) { + popup.setVerticalOffset(verticalOffset); + } + + final int horizontalOffset = a.getDimensionPixelOffset( + R.styleable.SherlockSpinner_android_dropDownHorizontalOffset, 0); + if (horizontalOffset != 0) { + popup.setHorizontalOffset(horizontalOffset); + } + + mPopup = popup; + + mGravity = a.getInt(R.styleable.SherlockSpinner_android_gravity, Gravity.CENTER); + + mPopup.setPromptText(a.getString(R.styleable.SherlockSpinner_android_prompt)); + + mDisableChildrenWhenDisabled = true; + + a.recycle(); + + // Base constructor can call setAdapter before we initialize mPopup. + // Finish setting things up if this happened. + if (mTempAdapter != null) { + mPopup.setAdapter(mTempAdapter); + mTempAdapter = null; + } + } + + @Override + public void setEnabled(boolean enabled) { + super.setEnabled(enabled); + if (mDisableChildrenWhenDisabled) { + final int count = getChildCount(); + for (int i = 0; i < count; i++) { + getChildAt(i).setEnabled(enabled); + } + } + } + + /** + * Describes how the selected item view is positioned. Currently only the horizontal component + * is used. The default is determined by the current theme. + * + * @param gravity See {@link android.view.Gravity} + * + * @attr ref android.R.styleable#Spinner_gravity + */ + public void setGravity(int gravity) { + if (mGravity != gravity) { + if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) == 0) { + gravity |= Gravity.LEFT; + } + mGravity = gravity; + requestLayout(); + } + } + + @Override + public void setAdapter(SpinnerAdapter adapter) { + super.setAdapter(adapter); + + if (mPopup != null) { + mPopup.setAdapter(new DropDownAdapter(adapter)); + } else { + mTempAdapter = new DropDownAdapter(adapter); + } + } + + @Override + public int getBaseline() { + View child = null; + + if (getChildCount() > 0) { + child = getChildAt(0); + } else if (mAdapter != null && mAdapter.getCount() > 0) { + child = makeAndAddView(0); + mRecycler.put(0, child); + removeAllViewsInLayout(); + } + + if (child != null) { + final int childBaseline = child.getBaseline(); + return childBaseline >= 0 ? child.getTop() + childBaseline : -1; + } else { + return -1; + } + } + + @Override + protected void onDetachedFromWindow() { + super.onDetachedFromWindow(); + + if (mPopup != null && mPopup.isShowing()) { + mPopup.dismiss(); + } + } + + /** + * <p>A spinner does not support item click events. Calling this method + * will raise an exception.</p> + * + * @param l this listener will be ignored + */ + @Override + public void setOnItemClickListener(OnItemClickListener l) { + throw new RuntimeException("setOnItemClickListener cannot be used with a spinner."); + } + + @Override + protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { + super.onMeasure(widthMeasureSpec, heightMeasureSpec); + if (mPopup != null && MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.AT_MOST) { + final int measuredWidth = getMeasuredWidth(); + setMeasuredDimension(Math.min(Math.max(measuredWidth, + measureContentWidth(getAdapter(), getBackground())), + MeasureSpec.getSize(widthMeasureSpec)), + getMeasuredHeight()); + } + } + + /** + * @see android.view.View#onLayout(boolean,int,int,int,int) + * + * Creates and positions all views + * + */ + @Override + protected void onLayout(boolean changed, int l, int t, int r, int b) { + super.onLayout(changed, l, t, r, b); + mInLayout = true; + layout(0, false); + mInLayout = false; + } + + /** + * Creates and positions all views for this Spinner. + * + * @param delta Change in the selected position. +1 moves selection is moving to the right, + * so views are scrolling to the left. -1 means selection is moving to the left. + */ + @Override + void layout(int delta, boolean animate) { + int childrenLeft = mSpinnerPadding.left; + int childrenWidth = getRight() - getLeft() - mSpinnerPadding.left - mSpinnerPadding.right; + + if (mDataChanged) { + handleDataChanged(); + } + + // Handle the empty set by removing all views + if (mItemCount == 0) { + resetList(); + return; + } + + if (mNextSelectedPosition >= 0) { + setSelectedPositionInt(mNextSelectedPosition); + } + + recycleAllViews(); + + // Clear out old views + removeAllViewsInLayout(); + + // Make selected view and position it + mFirstPosition = mSelectedPosition; + View sel = makeAndAddView(mSelectedPosition); + int width = sel.getMeasuredWidth(); + int selectedOffset = childrenLeft; + switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) { + case Gravity.CENTER_HORIZONTAL: + selectedOffset = childrenLeft + (childrenWidth / 2) - (width / 2); + break; + case Gravity.RIGHT: + selectedOffset = childrenLeft + childrenWidth - width; + break; + } + sel.offsetLeftAndRight(selectedOffset); + + // Flush any cached views that did not get reused above + mRecycler.clear(); + + invalidate(); + + checkSelectionChanged(); + + mDataChanged = false; + mNeedSync = false; + setNextSelectedPositionInt(mSelectedPosition); + } + + /** + * Obtain a view, either by pulling an existing view from the recycler or + * by getting a new one from the adapter. If we are animating, make sure + * there is enough information in the view's layout parameters to animate + * from the old to new positions. + * + * @param position Position in the spinner for the view to obtain + * @return A view that has been added to the spinner + */ + private View makeAndAddView(int position) { + + View child; + + if (!mDataChanged) { + child = mRecycler.get(position); + if (child != null) { + // Position the view + setUpChild(child); + + return child; + } + } + + // Nothing found in the recycler -- ask the adapter for a view + child = mAdapter.getView(position, null, this); + + // Position the view + setUpChild(child); + + return child; + } + + /** + * Helper for makeAndAddView to set the position of a view + * and fill out its layout paramters. + * + * @param child The view to position + */ + private void setUpChild(View child) { + + // Respect layout params that are already in the view. Otherwise + // make some up... + ViewGroup.LayoutParams lp = child.getLayoutParams(); + if (lp == null) { + lp = generateDefaultLayoutParams(); + } + + addViewInLayout(child, 0, lp); + + child.setSelected(hasFocus()); + if (mDisableChildrenWhenDisabled) { + child.setEnabled(isEnabled()); + } + + // Get measure specs + int childHeightSpec = ViewGroup.getChildMeasureSpec(mHeightMeasureSpec, + mSpinnerPadding.top + mSpinnerPadding.bottom, lp.height); + int childWidthSpec = ViewGroup.getChildMeasureSpec(mWidthMeasureSpec, + mSpinnerPadding.left + mSpinnerPadding.right, lp.width); + + // Measure child + child.measure(childWidthSpec, childHeightSpec); + + int childLeft; + int childRight; + + // Position vertically based on gravity setting + int childTop = mSpinnerPadding.top + + ((getMeasuredHeight() - mSpinnerPadding.bottom - + mSpinnerPadding.top - child.getMeasuredHeight()) / 2); + int childBottom = childTop + child.getMeasuredHeight(); + + int width = child.getMeasuredWidth(); + childLeft = 0; + childRight = childLeft + width; + + child.layout(childLeft, childTop, childRight, childBottom); + } + + @Override + public boolean performClick() { + boolean handled = super.performClick(); + + if (!handled) { + handled = true; + + if (!mPopup.isShowing()) { + mPopup.show(); + } + } + + return handled; + } + + public void onClick(DialogInterface dialog, int which) { + setSelection(which); + dialog.dismiss(); + } + + /** + * Sets the prompt to display when the dialog is shown. + * @param prompt the prompt to set + */ + public void setPrompt(CharSequence prompt) { + mPopup.setPromptText(prompt); + } + + /** + * Sets the prompt to display when the dialog is shown. + * @param promptId the resource ID of the prompt to display when the dialog is shown + */ + public void setPromptId(int promptId) { + setPrompt(getContext().getText(promptId)); + } + + /** + * @return The prompt to display when the dialog is shown + */ + public CharSequence getPrompt() { + return mPopup.getHintText(); + } + + int measureContentWidth(SpinnerAdapter adapter, Drawable background) { + if (adapter == null) { + return 0; + } + + int width = 0; + View itemView = null; + int itemType = 0; + final int widthMeasureSpec = + MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); + final int heightMeasureSpec = + MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); + + // Make sure the number of items we'll measure is capped. If it's a huge data set + // with wildly varying sizes, oh well. + int start = Math.max(0, getSelectedItemPosition()); + final int end = Math.min(adapter.getCount(), start + MAX_ITEMS_MEASURED); + final int count = end - start; + start = Math.max(0, start - (MAX_ITEMS_MEASURED - count)); + for (int i = start; i < end; i++) { + final int positionType = adapter.getItemViewType(i); + if (positionType != itemType) { + itemType = positionType; + itemView = null; + } + itemView = adapter.getView(i, itemView, this); + if (itemView.getLayoutParams() == null) { + itemView.setLayoutParams(new ViewGroup.LayoutParams( + ViewGroup.LayoutParams.WRAP_CONTENT, + ViewGroup.LayoutParams.WRAP_CONTENT)); + } + itemView.measure(widthMeasureSpec, heightMeasureSpec); + width = Math.max(width, itemView.getMeasuredWidth()); + } + + // Add background padding to measured width + if (background != null) { + background.getPadding(mTempRect); + width += mTempRect.left + mTempRect.right; + } + + return width; + } + + /** + * <p>Wrapper class for an Adapter. Transforms the embedded Adapter instance + * into a ListAdapter.</p> + */ + private static class DropDownAdapter implements ListAdapter, SpinnerAdapter { + private SpinnerAdapter mAdapter; + private ListAdapter mListAdapter; + + /** + * <p>Creates a new ListAdapter wrapper for the specified adapter.</p> + * + * @param adapter the Adapter to transform into a ListAdapter + */ + public DropDownAdapter(SpinnerAdapter adapter) { + this.mAdapter = adapter; + if (adapter instanceof ListAdapter) { + this.mListAdapter = (ListAdapter) adapter; + } + } + + public int getCount() { + return mAdapter == null ? 0 : mAdapter.getCount(); + } + + public Object getItem(int position) { + return mAdapter == null ? null : mAdapter.getItem(position); + } + + public long getItemId(int position) { + return mAdapter == null ? -1 : mAdapter.getItemId(position); + } + + public View getView(int position, View convertView, ViewGroup parent) { + return getDropDownView(position, convertView, parent); + } + + public View getDropDownView(int position, View convertView, ViewGroup parent) { + return mAdapter == null ? null : + mAdapter.getDropDownView(position, convertView, parent); + } + + public boolean hasStableIds() { + return mAdapter != null && mAdapter.hasStableIds(); + } + + public void registerDataSetObserver(DataSetObserver observer) { + if (mAdapter != null) { + mAdapter.registerDataSetObserver(observer); + } + } + + public void unregisterDataSetObserver(DataSetObserver observer) { + if (mAdapter != null) { + mAdapter.unregisterDataSetObserver(observer); + } + } + + /** + * If the wrapped SpinnerAdapter is also a ListAdapter, delegate this call. + * Otherwise, return true. + */ + public boolean areAllItemsEnabled() { + final ListAdapter adapter = mListAdapter; + if (adapter != null) { + return adapter.areAllItemsEnabled(); + } else { + return true; + } + } + + /** + * If the wrapped SpinnerAdapter is also a ListAdapter, delegate this call. + * Otherwise, return true. + */ + public boolean isEnabled(int position) { + final ListAdapter adapter = mListAdapter; + if (adapter != null) { + return adapter.isEnabled(position); + } else { + return true; + } + } + + public int getItemViewType(int position) { + return 0; + } + + public int getViewTypeCount() { + return 1; + } + + public boolean isEmpty() { + return getCount() == 0; + } + } + + /** + * Implements some sort of popup selection interface for selecting a spinner option. + * Allows for different spinner modes. + */ + private interface SpinnerPopup { + public void setAdapter(ListAdapter adapter); + + /** + * Show the popup + */ + public void show(); + + /** + * Dismiss the popup + */ + public void dismiss(); + + /** + * @return true if the popup is showing, false otherwise. + */ + public boolean isShowing(); + + /** + * Set hint text to be displayed to the user. This should provide + * a description of the choice being made. + * @param hintText Hint text to set. + */ + public void setPromptText(CharSequence hintText); + public CharSequence getHintText(); + } + + /* + private class DialogPopup implements SpinnerPopup, DialogInterface.OnClickListener { + private AlertDialog mPopup; + private ListAdapter mListAdapter; + private CharSequence mPrompt; + + public void dismiss() { + mPopup.dismiss(); + mPopup = null; + } + + public boolean isShowing() { + return mPopup != null ? mPopup.isShowing() : false; + } + + public void setAdapter(ListAdapter adapter) { + mListAdapter = adapter; + } + + public void setPromptText(CharSequence hintText) { + mPrompt = hintText; + } + + public CharSequence getHintText() { + return mPrompt; + } + + public void show() { + AlertDialog.Builder builder = new AlertDialog.Builder(getContext()); + if (mPrompt != null) { + builder.setTitle(mPrompt); + } + mPopup = builder.setSingleChoiceItems(mListAdapter, + getSelectedItemPosition(), this).show(); + } + + public void onClick(DialogInterface dialog, int which) { + setSelection(which); + dismiss(); + } + } + */ + + private class DropdownPopup extends IcsListPopupWindow implements SpinnerPopup { + private CharSequence mHintText; + private ListAdapter mAdapter; + + public DropdownPopup(Context context, AttributeSet attrs, int defStyleRes) { + super(context, attrs, 0, defStyleRes); + + setAnchorView(IcsSpinner.this); + setModal(true); + setPromptPosition(POSITION_PROMPT_ABOVE); + setOnItemClickListener(new OnItemClickListener() { + @SuppressWarnings("rawtypes") + public void onItemClick(AdapterView parent, View v, int position, long id) { + IcsSpinner.this.setSelection(position); + dismiss(); + } + }); + } + + @Override + public void setAdapter(ListAdapter adapter) { + super.setAdapter(adapter); + mAdapter = adapter; + } + + public CharSequence getHintText() { + return mHintText; + } + + public void setPromptText(CharSequence hintText) { + // Hint text is ignored for dropdowns, but maintain it here. + mHintText = hintText; + } + + @Override + public void show() { + final int spinnerPaddingLeft = IcsSpinner.this.getPaddingLeft(); + if (mDropDownWidth == WRAP_CONTENT) { + final int spinnerWidth = IcsSpinner.this.getWidth(); + final int spinnerPaddingRight = IcsSpinner.this.getPaddingRight(); + setContentWidth(Math.max( + measureContentWidth((SpinnerAdapter) mAdapter, getBackground()), + spinnerWidth - spinnerPaddingLeft - spinnerPaddingRight)); + } else if (mDropDownWidth == MATCH_PARENT) { + final int spinnerWidth = IcsSpinner.this.getWidth(); + final int spinnerPaddingRight = IcsSpinner.this.getPaddingRight(); + setContentWidth(spinnerWidth - spinnerPaddingLeft - spinnerPaddingRight); + } else { + setContentWidth(mDropDownWidth); + } + final Drawable background = getBackground(); + int bgOffset = 0; + if (background != null) { + background.getPadding(mTempRect); + bgOffset = -mTempRect.left; + } + setHorizontalOffset(bgOffset + spinnerPaddingLeft); + setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); + super.show(); + getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE); + setSelection(IcsSpinner.this.getSelectedItemPosition()); + } + } +} |