/*
*
*
* Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package javax.microedition.lcdui;
import com.sun.midp.configurator.Constants;
import javax.microedition.lcdui.ChoiceGroup.CGElement;
/**
* This is the look and feel implementation for ChoiceGroup.
*/
class ChoiceGroupLFImpl extends ItemLFImpl implements ChoiceGroupLF {
/**
* Creates ChoiceLF for the passed in ChoiceGroup.
* @param choiceGroup - the ChoiceGroup object associated with this view
*/
ChoiceGroupLFImpl(ChoiceGroup choiceGroup) {
super(choiceGroup);
cg = choiceGroup;
if (cg.numOfEls > 0 && cg.choiceType != Choice.MULTIPLE) {
selectedIndex = 0;
cg.cgElements[selectedIndex].setSelected(true);
}
}
// *******************************************************
// ChoiceGroupLF implementation
// ********************************************************
/**
* Notifies Look &s; Feel that an element was inserted into the
* <code>ChoiceGroup</code> at the the elementNum specified.
*
* @param elementNum the index of the element where insertion occurred
* @param stringPart the string part of the element to be inserted
* @param imagePart the image part of the element to be inserted,
* or <code>null</code> if there is no image part
*/
public void lInsert(int elementNum, String stringPart, Image imagePart) {
// make sure that there is a default selection
if (cg.choiceType != Choice.MULTIPLE) {
if (selectedIndex == -1) {
selectedIndex = 0;
cg.cgElements[selectedIndex].setSelected(true);
} else if (elementNum < selectedIndex &&
nativeId == DisplayableLFImpl.INVALID_NATIVE_ID) {
// an element was inserted before selectedIndex and
// selectedIndex has to be updated
selectedIndex++;
}
}
// Only update native resource if it exists.
if (nativeId != DisplayableLFImpl.INVALID_NATIVE_ID) {
ImageData imagePartData = null;
if (imagePart != null) {
imagePartData = imagePart.getImageData();
}
insert0(nativeId, elementNum,
stringPart, imagePartData,
cg.cgElements[elementNum].selected);
}
lRequestInvalidate(true, true);
}
/**
* Notifies Look &s; Feel that an element referenced by
* <code>elementNum</code> was deleted in the corresponding
* ChoiceGroup.
*
* @param elementNum the index of the deleted element
*/
public void lDelete(int elementNum) {
// adjust selected index
if (cg.numOfEls == 0) {
selectedIndex = -1;
} else if (cg.choiceType != ChoiceGroup.MULTIPLE) {
if (nativeId != DisplayableLFImpl.INVALID_NATIVE_ID) {
if (selectedIndex != -1 && selectedIndex < cg.numOfEls) {
cg.cgElements[selectedIndex].setSelected(false);
}
selectedIndex = getSelectedIndex0(nativeId);
}
if (elementNum < selectedIndex) {
selectedIndex--;
} else if (elementNum == selectedIndex &&
selectedIndex == cg.numOfEls) {
// last element is selected and deleted -
// new last should be selected
selectedIndex = cg.numOfEls - 1;
}
cg.cgElements[selectedIndex].setSelected(true);
}
if (nativeId != DisplayableLFImpl.INVALID_NATIVE_ID) {
delete0(nativeId, elementNum, selectedIndex);
}
lRequestInvalidate(true, true);
}
/**
* Notifies Look &s; Feel that all elements
* were deleted in the corresponding ChoiceGroup.
*/
public void lDeleteAll() {
// Only update native resource if it exists.
if (nativeId != DisplayableLFImpl.INVALID_NATIVE_ID) {
deleteAll0(nativeId);
}
selectedIndex = -1;
lRequestInvalidate(true, true);
}
/**
* Notifies Look &s; Fell that the <code>String</code> and
* <code>Image</code> parts of the
* element referenced by <code>elementNum</code> were set in
* the corresponding ChoiceGroup,
* replacing the previous contents of the element.
*
* @param elementNum the index of the element set
* @param stringPart the string part of the new element
* @param imagePart the image part of the element, or <code>null</code>
* if there is no image part
*/
public void lSet(int elementNum, String stringPart, Image imagePart) {
// Only update native resource if it exists.
if (nativeId != DisplayableLFImpl.INVALID_NATIVE_ID) {
ImageData imagePartData = null;
if (imagePart != null) {
imagePartData = imagePart.getImageData();
}
// for selected value to be passed correctly to the
// newly created element we have to do the sync first
// (alternatively we could rely on native to maintain
// the selected state correctly)
syncSelectedIndex();
syncSelectedFlags();
set0(nativeId, elementNum,
stringPart, imagePartData,
cg.cgElements[elementNum].selected);
}
lRequestInvalidate(true, true);
}
/**
* Notifies Look &s; Feel that an element was selected (or
* deselected) in the corresponding ChoiceGroup.
*
* @param elementNum the number of the element. Indexing of the
* elements is zero-based
* @param selected the new state of the element <code>true=selected</code>,
* <code>false=not</code> selected
*/
public void lSetSelectedIndex(int elementNum, boolean selected) {
// Only update native resource if it exists.
if (nativeId != DisplayableLFImpl.INVALID_NATIVE_ID) {
setSelectedIndex0(nativeId, elementNum, selected);
} else {
if (cg.choiceType == Choice.MULTIPLE) {
cg.cgElements[elementNum].setSelected(selected);
} else {
// selected item cannot be deselected in
// EXCLUSIVE, IMPLICIT, POPUP ChoiceGroup
if (!selected ||
(/* choiceType != Choice.IMPLICIT && */
selectedIndex == elementNum)) {
return;
}
cg.cgElements[selectedIndex].setSelected(false);
selectedIndex = elementNum;
cg.cgElements[selectedIndex].setSelected(true);
}
}
}
/**
* Notifies Look &s; Feel that selected state was changed on
* several elements in the corresponding MULTIPLE ChoiceGroup
* (cannot be null).
* @param selectedArray an array in which the method collect the
* selection status
*/
public void lSetSelectedFlags(boolean[] selectedArray) {
// Only update native resource if it exists.
if (nativeId != DisplayableLFImpl.INVALID_NATIVE_ID) {
setSelectedFlags0(nativeId, selectedArray,
selectedArray.length);
}
}
/**
* Notifies Look &s; Feel that a new text fit policy was set
* in the corresponding ChoiceGroup.
* @param fitPolicy preferred content fit policy for choice elements
*/
public void lSetFitPolicy(int fitPolicy) {
// Only update native resource if it exists.
if (nativeId != DisplayableLFImpl.INVALID_NATIVE_ID) {
setFitPolicy0(nativeId, fitPolicy);
lRequestInvalidate(true, true);
}
}
/**
* Notifies Look &s; Feel that a new font was set for an
* element with the specified elementNum in the
* corresponding ChoiceGroup.
* @param elementNum the index of the element, starting from zero
* @param font the preferred font to use to render the element
*/
public void lSetFont(int elementNum, Font font) {
// Only update native resource if it exists.
if (nativeId != DisplayableLFImpl.INVALID_NATIVE_ID) {
setFont0(nativeId, elementNum,
font.getFace(), font.getStyle(), font.getSize());
lRequestInvalidate(true, true);
}
}
/**
* Gets default font to render ChoiceGroup element if it was not
* set by the application
* @return - the font to render ChoiceGroup element if it was not
* set by the app
*/
public Font getDefaultFont() {
return Theme.curContentFont;
}
/**
* Gets currently selected index
* @return currently selected index
*/
public int lGetSelectedIndex() {
if (nativeId == DisplayableLFImpl.INVALID_NATIVE_ID) {
return selectedIndex;
} else {
// sync with native
syncSelectedIndex();
return selectedIndex;
}
}
/**
* Gets selected flags.(only elements corresponding to the
* elements are expected to be filled). ChoiceGroup sets the rest to
* false
* @param selectedArray_return to contain the results
* @return the number of selected elements
*/
public int lGetSelectedFlags(boolean[] selectedArray_return) {
int countSelected = 0;
if (nativeId == DisplayableLFImpl.INVALID_NATIVE_ID) {
for (int i = 0; i < cg.numOfEls; i++) {
selectedArray_return[i] = cg.cgElements[i].selected;
if (selectedArray_return[i]) {
countSelected++;
}
}
} else {
countSelected = getSelectedFlags0(nativeId, selectedArray_return,
cg.numOfEls);
// sync with native
for (int i = 0; i < cg.numOfEls; i++) {
cg.cgElements[i].setSelected(selectedArray_return[i]);
}
}
return countSelected;
}
/**
* Determines if an element with a passed in index
* is selected or not.
* @param elementNum the index of an element in question
* @return true if the element is selected, false - otherwise
*/
public boolean lIsSelected(int elementNum) {
if (nativeId == DisplayableLFImpl.INVALID_NATIVE_ID) {
return cg.cgElements[elementNum].selected;
}
return isSelected0(nativeId, elementNum);
}
// *****************************************************
// Package private methods
// *****************************************************
/**
* Called by event delivery to notify an ItemLF in current FormLF
* of a change in its peer state.
*
* @param hint index of the element whose selection status has changed
* @return always true so ItemStateListener should be notified
*/
boolean uCallPeerStateChanged(int hint) {
// Any hint means selection has change
// For types other than IMPLICIT List, notify itemStateListener.
if (cg.choiceType != Choice.IMPLICIT) {
return true; // notify itemStateListener
}
// For IMPLICIT List, notify commandListener
List list;
CommandListener cl;
Command cmd;
synchronized (Display.LCDUILock) {
list = (List)cg.owner;
if (list.listener == null ||
list.selectCommand == null ||
cg.numOfEls == 0) {
return false; // No itemStateListener to notify
}
cl = list.listener;
cmd = list.selectCommand;
}
try {
synchronized (Display.calloutLock) {
cl.commandAction(cmd, list);
}
} catch (Throwable thr) {
Display.handleThrowable(thr);
}
return false; // No itemStateListener to notify
}
/**
* Determine if this Item should have a newline after it
*
* @return true if it should have a newline after
*/
boolean equateNLA() {
if (super.equateNLA()) {
return true;
}
return ((cg.layout & Item.LAYOUT_2) != Item.LAYOUT_2);
}
/**
* Determine if this Item should have a newline before it
*
* @return true if it should have a newline before
*/
boolean equateNLB() {
if (super.equateNLB()) {
return true;
}
return ((cg.layout & Item.LAYOUT_2) != Item.LAYOUT_2);
}
/**
/**
* Override <code>ItemLFImpl</code> method to sync with native resource
* before hiding the native resource. Selection of native resource will
* be preserved before the resource is hidden.
*/
void lHideNativeResource() {
// sync selected flags and selectedIndex
// before any visible native resource is deleted.
if (nativeId != DisplayableLFImpl.INVALID_NATIVE_ID) {
syncSelectedIndex();
syncSelectedFlags();
}
// Hide native resource
super.lHideNativeResource();
}
/**
* Creates and sets native resource for current ChoiceGroup.
* Override function in ItemLFImpl.
* @param ownerId Owner screen's native resource id
*/
void createNativeResource(int ownerId) {
nativeId = createNativeResource0(ownerId, cg.label,
(cg.owner instanceof List ?
-1 : cg.layout),
cg.choiceType, cg.fitPolicy,
cg.cgElements, cg.numOfEls,
selectedIndex);
}
// *****************************************************
// Private methods
// *****************************************************
/**
* Read and save user selection from native resource.
*/
private void syncSelectedIndex() {
if (cg.choiceType != Choice.MULTIPLE) {
int newSelectedIndex = getSelectedIndex0(nativeId);
if (selectedIndex != newSelectedIndex) {
if (selectedIndex != -1) {
cg.cgElements[selectedIndex].setSelected(false);
}
selectedIndex = newSelectedIndex;
if (selectedIndex != -1) {
cg.cgElements[selectedIndex].setSelected(true);
}
}
}
}
/**
* Read and save user selection from native resource.
*/
private void syncSelectedFlags() {
if (cg.numOfEls > 0 && cg.choiceType == Choice.MULTIPLE) {
boolean[] selectedArray_return = new boolean[cg.numOfEls];
getSelectedFlags0(nativeId, selectedArray_return,
cg.numOfEls);
for (int i = 0; i < cg.numOfEls; i++) {
cg.cgElements[i].setSelected(selectedArray_return[i]);
}
}
}
/**
* KNI function that creates native resource for current ChoiceGroup.
* @param ownerId Owner screen's native resource id (MidpDisplayable *)
* @param label string to be used as label for this ChoiceGroup
* @param layout layout directive associated with this <code>Item</code>
* @param choiceType should be EXCLUSIVE, MULTIPLE, IMPLICIT, POPUP
* @param fitPolicy should be TEXT_WRAP_DEFAULT, TEXT_WRAP_ON, or
* TEXT_WRAP_OFF
* @param cgElements array of CGElement that stores such data as
* image, text, font, selection state per element
* @param numChoices number of valid elements in cgElements array
* @param selectedIndex index of a currently selected element
* (has no meaning for MULTIPLE ChoiceGroup)
* @return native resource id (MidpItem *) of this ChoiceGroup
*/
private native int createNativeResource0(int ownerId, String label,
int layout,
int choiceType, int fitPolicy,
CGElement []cgElements,
int numChoices,
int selectedIndex);
/**
* KNI function that notifies native resource of a new element
* inserted prior to the element specified
*
* @param nativeId native resource id (MidpItem *) of this ChoiceGroup
* @param elementNum the index of an element where insertion is to occur
* @param stringPart the string part of the element to be inserted
* @param imagePart the image part of the element to be inserted
* @param selected the selected state of the element to be inserted
*/
private native void insert0(int nativeId, int elementNum,
String stringPart, ImageData imagePart,
boolean selected);
/**
* KNI function that notifies native resource of a specified element
* being deleted in the corresponding ChoiceGroup.
*
* @param nativeId native resource id (MidpItem *) of this ChoiceGroup
* @param elementNum the index of an element to be deleted
* @param selectedIndex the index of an element to be selected after the
* deletion is done (has no meaning for MULTIPLE ChoiceGroup)
*/
private native void delete0(int nativeId, int elementNum,
int selectedIndex);
/**
* KNI function that notifies native resource that all elements were
* deleted in the corresponding ChoiceGroup.
*
* @param nativeId native resource id (MidpItem *) of this ChoiceGroup
*/
private native void deleteAll0(int nativeId);
/**
* KNI function that notifies native resource of a specified element
* being set in the corresponding ChoiceGroup.
*
* @param nativeId native resource id (MidpItem *) of this ChoiceGroup
* @param elementNum the index of an element to be set
* @param stringPart the string part of the element to be set
* @param imagePart the image part of the element to be set
* @param selected the selected state of the element to be set
*/
private native void set0(int nativeId, int elementNum,
String stringPart, ImageData imagePart,
boolean selected);
/**
* KNI function that notifies native resource of an element's new selected
* state in the corresponding ChoiceGroup.
*
* @param nativeId native resource id (MidpItem *) of this ChoiceGroup
* @param elementNum the index of an element which selected state changed
* @param selected the new selected state
*/
private native void setSelectedIndex0(int nativeId, int elementNum,
boolean selected);
/**
* KNI function that notifies native resource of new selected
* states in the corresponding ChoiceGroup.
*
* @param nativeId native resource id (MidpItem *) of this ChoiceGroup
* @param selectedArray array with new selected states
* @param numSelectedArray number of elements in selectedArray to be used
*/
private native void setSelectedFlags0(int nativeId,
boolean []selectedArray,
int numSelectedArray);
/**
* KNI function that notifies native resource of fit policy change
* in the corresponding ChoiceGroup.
*
* @param nativeId native resource id (MidpItem *) of this ChoiceGroup
* @param fitPolicy new fit policy (can be TEXT_WRAP_OFF, TEXT_WRAP_ON,
* or TEXT_WRAP_DEFAULT)
*/
private native void setFitPolicy0(int nativeId, int fitPolicy);
/**
* KNI function that notifies native resource of an element's new font
* setting in the corresponding ChoiceGroup.
*
* @param nativeId native resource id (MidpItem *) of this ChoiceGroup
* @param elementNum the index of an element which font has changed
* @param face of the newly set font
* @param style of the newly set font
* @param size of newly set font
*/
private native void setFont0(int nativeId, int elementNum,
int face, int style, int size);
/**
* KNI function that gets index of a currently selected index from
* the ChoiceGroup's native resource.
*
* @param nativeId native resource id (MidpItem *) of this ChoiceGroup
* @return index of the currently selected element
*/
private native int getSelectedIndex0(int nativeId);
/**
* KNI function that queries the state of all elements in the native
* resource and returns it in the passed in selectedArray array.
*
* @param nativeId native resource id (MidpItem *) of this ChoiceGroup
* @param selectedArray to contain the results
* @param numOfEls number of elements in selectedArray
* @return the number of elements selected in the native resource
*/
private native int getSelectedFlags0(int nativeId,
boolean[] selectedArray,
int numOfEls);
/**
* KNI function that queries the state of an element in the native
* resource
*
* @param nativeId native resource id (MidpItem *) of this ChoiceGroup
* @param elementNum the index of an element which state is queried
* @return the current state of an element in the nativer resource
*/
private native boolean isSelected0(int nativeId, int elementNum);
/** ChoiceGroup associated with this ChoiceGroupLF. */
ChoiceGroup cg;
/**
* The currently selected index of this ChoiceGroup (-1 by default).
*/
int selectedIndex = -1;
}
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