/*
*
*
* 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.lcdui.Text;
import com.sun.midp.configurator.Constants;
import javax.microedition.lcdui.ChoiceGroup.CGElement;
import com.sun.midp.chameleon.skins.ChoiceGroupSkin;
import com.sun.midp.chameleon.skins.resources.ChoiceGroupResources;
import com.sun.midp.chameleon.skins.ScreenSkin;
import com.sun.midp.chameleon.layers.ScrollIndLayer;
/**
* This is the look &s; 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;
ChoiceGroupResources.load();
if (cg.numOfEls > 0) {
if (cg.choiceType != Choice.MULTIPLE) {
selectedIndex = 0;
cg.cgElements[selectedIndex].setSelected(true);
}
hilightedIndex = 0;
}
contentX = getContentX(cg.choiceType);
elHeights = new int[cg.numOfEls + ChoiceGroup.GROW_FACTOR];
}
// *******************************************************
// ChoiceGroupLF implementation
// ********************************************************
/**
* Sets the content size in the passed in array.
* Content is calculated based on the availableWidth.
* size[WIDTH] and size[HEIGHT] should be set by this method.
* @param size The array that holds Item content size and location
* in Item internal bounds coordinate system.
* @param width The width available for this Item
*/
public void lGetContentSize(int size[], int width) {
// Allow lists to be as big at least as the view port
if ((cg.owner != null) && (cg.owner instanceof List)) {
size[WIDTH] = cg.owner.getLF().lGetWidth();
int eHeight = calculateHeight(
getAvailableContentWidth(cg.choiceType,
size[WIDTH]));
size[HEIGHT] = (cg.owner.getLF().lGetHeight() > eHeight ?
cg.owner.getLF().lGetHeight() : eHeight);
} else {
if (cg.numOfEls == 0) {
size[WIDTH] = size[HEIGHT] = 0;
}
int availableWidth = getAvailableContentWidth(cg.choiceType,
width);
int eHeight = calculateHeight(availableWidth);
int maxContentWidth = getMaxElementWidth(availableWidth);
if (maxContentWidth <= availableWidth) {
// note that width - availableWidth equals
// choice image area all horizontal padding;
// thus width - availableWidth + maxContentWidth is
// the width of the widest element in ChoiceGroup with padding
size[WIDTH] = width - availableWidth + maxContentWidth;
} else {
size[WIDTH] = width;
}
size[HEIGHT] = eHeight;
}
}
/**
* Notifies L&F that an element was inserted into the
* <code>ChoiceGroup</code> at 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) {
// Implicit, popup and exclusive
// (in those case there is always a selection)
if (cg.choiceType != Choice.MULTIPLE) {
if (selectedIndex == -1) {
selectedIndex = 0;
cg.cgElements[selectedIndex].setSelected(true);
} else if (elementNum <= selectedIndex) {
selectedIndex++;
}
}
// set hilighted index (it always exists)
if (elementNum <= hilightedIndex || hilightedIndex == -1) {
hilightedIndex++;
}
// Note that cg.numOfEls is already + 1
// elHeights is created in the constructor and cannot be null
if (cg.numOfEls - 1 == elHeights.length) { // full capacity reached
int[] newArray =
new int[cg.numOfEls + ChoiceGroup.GROW_FACTOR];
System.arraycopy(elHeights, 0, newArray, 0, elementNum);
System.arraycopy(elHeights, elementNum, newArray, elementNum + 1,
cg.numOfEls - elementNum - 1);
elHeights = newArray; // swap them
} else if (elementNum != cg.numOfEls - 1) {
// if we're not appending
System.arraycopy(elHeights, elementNum, elHeights, elementNum + 1,
cg.numOfEls - elementNum - 1);
}
lRequestInvalidate(true, true);
}
/**
* Notifies L&F 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) {
if (cg.numOfEls == 0) {
selectedIndex = -1;
hilightedIndex = -1;
} else {
// adjust hilighted index
if (elementNum < hilightedIndex) {
hilightedIndex--;
} else if (elementNum == hilightedIndex &&
hilightedIndex == cg.numOfEls) {
hilightedIndex = cg.numOfEls - 1;
}
if (cg.choiceType != ChoiceGroup.MULTIPLE) {
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);
}
}
// setup new elements array (note that numOfEls is already -1)
if (elementNum != cg.numOfEls) {
System.arraycopy(elHeights, elementNum + 1, elHeights,
elementNum, cg.numOfEls - elementNum);
}
// free some memory... (efficient for very large arrays)
if (elHeights.length > (ChoiceGroup.GROW_FACTOR * 10) &&
elHeights.length / cg.numOfEls >= 2) {
int[] newArray = new int[cg.numOfEls + ChoiceGroup.GROW_FACTOR];
System.arraycopy(elHeights, 0, newArray, 0, cg.numOfEls);
elHeights = newArray;
newArray = null;
}
lRequestInvalidate(true, true);
}
/**
* Notifies L&F that all elements
* were deleted in the corresponding ChoiceGroup.
*/
public void lDeleteAll() {
selectedIndex = hilightedIndex = -1;
elHeights = new int[ChoiceGroup.GROW_FACTOR]; // initial size
lRequestInvalidate(true, true);
}
/**
* Notifies L&F 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) {
lRequestInvalidate(true, true);
}
/**
* Notify this itemLF that its owner screen has changed.
* Clear internal state if its new owner is null.
*
* @param oldOwner old owner screen before this change. New owner
* can be found in Item model.
*/
public void lSetOwner(Screen oldOwner) {
super.lSetOwner(oldOwner);
if (item.owner != null && item.owner instanceof List) {
drawsTraversalIndicator = false;
}
}
/**
* Notifies L&F that an element was selected/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) {
setSelectedIndex(elementNum, selected);
lRequestPaint();
}
/**
* Notifies L&F that selected state was changed on several elements
* in the corresponding MULTIPLE ChoiceGroup.
* @param selectedArray an array in which the method collect the
* selection status
*/
public void lSetSelectedFlags(boolean[] selectedArray) {
lRequestPaint();
}
/**
* Notifies L&F 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) {
lRequestInvalidate(true, true);
}
/**
* Notifies L&F 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) {
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 getTextFont(cg.choiceType, false);
}
/**
* Gets currently selected index
* @return currently selected index
*/
public int lGetSelectedIndex() {
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;
for (int i = 0; i < cg.numOfEls; i++) {
selectedArray_return[i] = cg.cgElements[i].selected;
if (selectedArray_return[i]) {
countSelected++;
}
}
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) {
return cg.cgElements[elementNum].selected;
}
// *****************************************************
// Package private methods
// *****************************************************
/**
* 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);
}
/**
* Handle traversal within this ChoiceGroup
*
* @param dir the direction of traversal
* @param viewportWidth the width of the viewport
* @param viewportHeight the height of the viewport
* @param visRect the in/out rectangle for the internal traversal location
* @return True if traversal occurred within this ChoiceGroup
*/
boolean lCallTraverse(int dir, int viewportWidth, int viewportHeight,
int[] visRect)
{
boolean ret = super.lCallTraverse(dir, viewportWidth, viewportHeight, visRect);
// all choice items are out of viewport.
// Probably justr the label (if it's present) is visible on the screen
int contentY = contentBounds[Y] + ScreenSkin.PAD_FORM_ITEMS;
int contentH = contentBounds[HEIGHT] - 2 * ScreenSkin.PAD_FORM_ITEMS;
if (contentY > visRect[Y] + visRect[HEIGHT] ||
contentY + contentH < visRect[Y]) {
return ret;
}
// If we have no elements - just return false
if (cg.numOfEls > 0) {
int newHeight = visRect[HEIGHT];
int newHilightedIndex = hilightedIndex;
int newY = contentY;
boolean resetVisRect = false;
if (traversedIn) {
for (int i = 0; i < newHilightedIndex; i++) {
newY += elHeights[i];
}
newHeight = elHeights[newHilightedIndex];
// highlighted index is out of visible rect
// move highlight to the best place
if (newY + newHeight > visRect[Y] + visRect[HEIGHT]) {
newHilightedIndex =
getIndexByPointer(visRect[X],
visRect[Y] + visRect[HEIGHT] - 1);
} else if (newY < visRect[Y]) {
newHilightedIndex = getIndexByPointer(visRect[X], visRect[Y] + 1);
}
resetVisRect = ret = (newHilightedIndex != hilightedIndex);
// if the visRect does not contain highlighted item
// don't adjust the highlighted index once again
if (!ret) {
switch (dir) {
case Canvas.UP:
if (hilightedIndex > 0) {
if (newY >= visRect[Y]) {
newHeight = elHeights[--newHilightedIndex];
newY -=newHeight;
}
ret = true;
}
break;
case Canvas.DOWN:
if (hilightedIndex < (cg.numOfEls - 1)) {
if (newY + newHeight <= visRect[Y] + visRect[HEIGHT]) {
newY +=elHeights[newHilightedIndex];
newHeight = elHeights[++newHilightedIndex];
}
ret = true;
}
break;
case CustomItem.NONE:
// don't move the highlight
ret = true;
break;
}
}
} else {
if (cg.choiceType == Choice.IMPLICIT &&
pendingIndex == -1) {
pendingIndex = selectedIndex;
}
if (pendingIndex != -1) {
newHilightedIndex = pendingIndex;
pendingIndex = -1;
} else if (newHilightedIndex == -1) {
newHilightedIndex = getIndexByPointer(contentBounds[X], dir == Canvas.UP ?
contentY + contentH - 1 :
contentY);
}
if (newHilightedIndex != -1) {
traversedIn = true;
ret = cg.numOfEls > 1;
resetVisRect = true;
}
}
if (hilightedIndex != newHilightedIndex &&
newHilightedIndex != -1) {
if (resetVisRect) {
newY = contentY;
for (int i = 0; i < newHilightedIndex; i++) {
newY += elHeights[i];
}
newHeight = elHeights[newHilightedIndex];
}
if (cg.choiceType == Choice.IMPLICIT) {
setSelectedIndex(newHilightedIndex, true);
}
hilightedIndex = newHilightedIndex;
lRequestPaint();
}
visRect[Y] = newY;
visRect[HEIGHT] = newHeight;
}
return ret;
}
/**
* Traverse out of this ChoiceGroup
*/
void lCallTraverseOut() {
super.lCallTraverseOut();
traversedIn = false;
hilightedIndex = -1;
}
/**
* Determine if Form should not traverse to this ChoiceGroup
*
* @return true if Form should not traverse to this ChoiceGroup
*/
boolean shouldSkipTraverse() {
if ((cg.label == null || cg.label.equals("")) &&
(cg.numOfEls == 0)) {
return true;
}
return false;
}
/**
* Get the index of choice item contains the pointer
* @param x the x coordinate of the pointer
* @param y the y coordinate of the pointer
* @return the index of choice item
*/
int getIndexByPointer(int x, int y) {
int id = -1;
if (cg.numOfEls > 0) {
//if pointer was dragged outside the item.
if (contentBounds[X] <= x &&
x <= contentBounds[X] + contentBounds[WIDTH] &&
contentBounds[Y] <= y &&
y <= contentBounds[Y] + contentBounds[HEIGHT]) {
int visY = contentBounds[Y];
for (int i = 0; i < cg.numOfEls; i++) {
visY += elHeights[i];
if (visY >= y) {
id = i;
break;
}
}
}
}
return id;
}
/**
* Called by the system to signal a pointer press
*
* @param x the x coordinate of the pointer down
* @param y the y coordinate of the pointer down
*
* @see #getInteractionModes
*/
void uCallPointerPressed(int x, int y) {
itemWasPressed = true;
int i = getIndexByPointer(x, y);
if (i >= 0) {
hilightedIndex = pendingIndex = i;
hasFocusWhenPressed = cg.cgElements[hilightedIndex].selected;
if (cg.choiceType == Choice.IMPLICIT) {
setSelectedIndex(hilightedIndex, true);
}
uRequestPaint();
// getCurrentDisplay().serviceRepaints(cg.owner.getLF()); //make the change shown immediately for better user experience
}
}
/**
* Called by the system to signal a pointer release
*
* @param x the x coordinate of the pointer up
* @param y the x coordinate of the pointer up
*/
void uCallPointerReleased(int x, int y) {
if (!itemWasPressed)
return;
int i = getIndexByPointer(x, y);
if (i == hilightedIndex) { // execute command only if no drag event occured
if (cg.choiceType == Choice.IMPLICIT) {
if (hasFocusWhenPressed || item.owner.numCommands <= 1) {
uCallKeyPressed(Constants.KEYCODE_SELECT);
}
} else {
uCallKeyPressed(Constants.KEYCODE_SELECT);
}
uRequestPaint();
}
itemWasPressed = false;
}
/**
* Handle a key press event
*
* @param keyCode the key which was pressed
*/
void uCallKeyPressed(int keyCode) {
Form form = null;
List list = null;
Command cmd = null;
CommandListener cl = null;
synchronized (Display.LCDUILock) {
if (keyCode != Constants.KEYCODE_SELECT || (cg.numOfEls == 0)) {
return;
}
switch (cg.choiceType) {
case Choice.EXCLUSIVE:
if (hilightedIndex == selectedIndex) {
return;
}
setSelectedIndex(hilightedIndex, true);
if (cg.owner instanceof Form) {
form = (Form)cg.owner; // notify itemStateListener
}
break;
case Choice.MULTIPLE:
setSelectedIndex(hilightedIndex,
!cg.cgElements[hilightedIndex].selected);
if (cg.owner instanceof Form) {
form = (Form)cg.owner; // notify itemStateListener
}
break;
case Choice.IMPLICIT:
list = (List)cg.owner;
if (list.listener != null && list.selectCommand != null) {
cl = list.listener;
cmd = list.selectCommand;
}
break;
}
lRequestPaint();
} // synchronized (LCDUILock)
// For IMPLICIT List, notify command listener
if (cl != null) {
try {
// SYNC NOTE: We lock on calloutLock around any calls
// into application code.
synchronized (Display.calloutLock) {
cl.commandAction(cmd, list);
}
} catch (Throwable thr) {
Display.handleThrowable(thr);
}
} else if (form != null) {
// For EXCLUSIVE and MULTIPLE CG, notify item state listener
form.uCallItemStateChanged(cg);
}
}
/**
* Get the total element height of this CGroup
*
* @param width the desired width for this CG
* @return the total element height
*/
int calculateHeight(int width) {
int eHeight = 0;
for (int x = 0; x < cg.numOfEls; x++) {
eHeight += calculateElementHeight(cg.cgElements[x], x, width);
}
return eHeight;
}
/**
* Get the width of the widest element in choice group
*
* @param availableWidth The width available for rendering
* content of the element
* @return the width of the widest element in the choice group
*/
int getMaxElementWidth(int availableWidth) {
int width = 0;
int maxWidth = 0;
for (int i = 0; i < cg.numOfEls; i++) {
width = contentX;
if (cg.cgElements[i].imageEl != null) {
width += ChoiceGroupSkin.WIDTH_IMAGE +
ChoiceGroupSkin.PAD_H;
}
if ((cg.cgElements[i].stringEl != null) &&
(cg.cgElements[i].stringEl.length() > 0)) {
width += (2 * ChoiceGroupSkin.PAD_H) +
Text.getWidestLineWidth(
cg.cgElements[i].stringEl,
width,
availableWidth,
cg.cgElements[i].getFont());
}
if (width > maxWidth) {
maxWidth = width;
}
}
return maxWidth;
}
/**
* Sets or unsets selection of an element with elementNum index.
* @param elementNum index of the element which selection has to
* to changed
* @param selected - true if the element is to be selected,
* false - otherwise
*/
void setSelectedIndex(int elementNum, boolean selected) {
if (cg.choiceType == Choice.MULTIPLE) {
cg.cgElements[elementNum].setSelected(selected);
} else {
// selected item cannot be deselected in
// EXCLUSIVE, IMPLICIT, POPUP ChoiceGroup
if (!selected ||
(cg.choiceType != Choice.IMPLICIT &&
selectedIndex == elementNum)) {
return;
}
if (hilightedIndex != elementNum &&
elementNum >= 0 && cg.choiceType == Choice.IMPLICIT) {
hilightedIndex = elementNum;
}
cg.cgElements[selectedIndex].setSelected(false);
selectedIndex = elementNum;
cg.cgElements[selectedIndex].setSelected(true);
}
}
/**
* Paints the content area of this ChoiceGroup.
* Graphics is translated to contents origin.
* @param g The graphics where Item content should be painted
* @param w The width available for the Item's content
* @param h The height available for the Item's content
*/
void lPaintContent(Graphics g, int w, int h) {
lPaintElements(g, w, h);
}
/**
* Paints the all the elements onto the graphics that translated to
* the elements origin.
* @param g The graphics where elements should be painted
* @param w The width available for the elements content
* @param h The height available for the elements content
*/
void lPaintElements(Graphics g, int w, int h) {
Image choiceImg;
int textOffset;
boolean hilighted;
int cType = cg.choiceType;
int contentW = getAvailableContentWidth(cType, w);
int translatedY = 0;
// IMPL_NOTE: Right now we have no vertical padding per element,
// nor per line in the element
// ChoiceImage and content images are drawn at y = 0
// IMPL_NOTE: Content image area is always of PREFERRED_IMG_W and
// PREFERRED_IMG_H (even if the image is smaller or there is space)
// and it is always painted at y = 0 of the element
// Note that lPaintElements is always called after
// ItemLFImpl.lDoInternalLayout() which will make sure that
// calculateElementHeight() was called
int mode = (cg.fitPolicy == Choice.TEXT_WRAP_OFF) ?
(Text.NORMAL | Text.TRUNCATE) : Text.NORMAL;
int offSetX = ChoiceGroupSkin.PAD_H;
// start for
for (int iX, iY, iW, iH, i = 0; i < cg.numOfEls; i++) {
// note that background was cleared
// we will need to repaint background only for
// hilighted portion
choiceImg = getChoiceImage(cType,
cType == Choice.MULTIPLE ?
cg.cgElements[i].selected :
i == selectedIndex);
if (choiceImg != null) {
g.drawImage(choiceImg, 0, 0,
Graphics.LEFT | Graphics.TOP);
offSetX = ChoiceGroupSkin.PAD_H + choiceImg.getWidth();
} else {
g.setColor(ChoiceGroupSkin.COLOR_FG);
switch (cType) {
case Choice.MULTIPLE:
offSetX = ChoiceGroupSkin.PAD_H +
ChoiceGroupSkin.WIDTH_IMAGE;
g.drawRect(1, 1,
ChoiceGroupSkin.WIDTH_IMAGE - 3,
ChoiceGroupSkin.HEIGHT_IMAGE - 3);
if (cg.cgElements[i].selected) {
g.fillRect(3, 3,
ChoiceGroupSkin.WIDTH_IMAGE - 6,
ChoiceGroupSkin.HEIGHT_IMAGE - 6);
}
break;
case Choice.EXCLUSIVE:
offSetX = ChoiceGroupSkin.PAD_H +
ChoiceGroupSkin.WIDTH_IMAGE;
g.drawArc(1, 1,
ChoiceGroupSkin.WIDTH_IMAGE - 2,
ChoiceGroupSkin.HEIGHT_IMAGE - 2, 0, 360);
if (i == selectedIndex) {
g.fillArc(3, 3,
ChoiceGroupSkin.WIDTH_IMAGE - 5,
ChoiceGroupSkin.HEIGHT_IMAGE - 5, 0, 360);
}
break;
}
}
g.translate(offSetX, 0);
hilighted = (i == hilightedIndex && hasFocus);
if (hilighted) {
g.setColor(ScreenSkin.COLOR_BG_HL);
g.fillRect(-ChoiceGroupSkin.PAD_H, 0,
ChoiceGroupSkin.PAD_H + contentW +
ChoiceGroupSkin.PAD_H,
elHeights[i]);
}
if (cg.cgElements[i].imageEl == null) {
textOffset = 0;
} else {
iX = g.getClipX();
iY = g.getClipY();
iW = g.getClipWidth();
iH = g.getClipHeight();
g.clipRect(0, 0,
ChoiceGroupSkin.WIDTH_IMAGE,
ChoiceGroupSkin.HEIGHT_IMAGE);
g.drawImage(cg.cgElements[i].imageEl,
0, 0,
Graphics.LEFT | Graphics.TOP);
g.setClip(iX, iY, iW, iH);
textOffset = ChoiceGroupSkin.WIDTH_IMAGE +
ChoiceGroupSkin.PAD_H;
}
g.translate(0, -1);
Text.paint(g, cg.cgElements[i].stringEl,
cg.cgElements[i].getFont(),
ChoiceGroupSkin.COLOR_FG,
ScreenSkin.COLOR_FG_HL,
contentW, elHeights[i], textOffset,
(hilighted) ? mode | Text.INVERT : mode, null);
g.translate(-offSetX, elHeights[i] + 1);
translatedY += elHeights[i];
} // end for
g.translate(0, -translatedY);
}
/**
* Returns true if label and content can be placed on the same line.
* If this function returns always false then content will be
* always put on a new line in relation to label.
*
* @param labelHeight The height available for the label
* @return true If label and content can be placed on the same line;
* otherwise - false.
*/
boolean labelAndContentOnSameLine(int labelHeight) {
return cg.choiceType == Choice.POPUP ?
super.labelAndContentOnSameLine(labelHeight) :
false;
}
/**
* Returns the font to use when rendering a choice element
* based on the boolean hilighted flag being passed in.
*
* @param type choicegroup type used to decide what font to return
* @param hilighted used to decide on hilighted font or normal font
* @return the font to use to render text
*/
public static Font getTextFont(int type, boolean hilighted) {
return (hilighted) ? ChoiceGroupSkin.FONT_FOCUS :
ChoiceGroupSkin.FONT;
}
/**
* Returns the available content width to render a choice element
* for the passed in choicegroup type and given total width.
*
* @param type choicegroup type
* @param w given width, used to calculate available width for content
* @return the available content width to render a choice element
*/
static int getAvailableContentWidth(int type, int w) {
w -= (2 * ChoiceGroupSkin.PAD_H); // Implicit
switch (type) {
case Choice.EXCLUSIVE:
case Choice.MULTIPLE:
w -= (ChoiceGroupSkin.WIDTH_IMAGE + ChoiceGroupSkin.PAD_H);
break;
case Choice.POPUP:
if (ChoiceGroupSkin.IMAGE_BUTTON_ICON != null) {
w -= ChoiceGroupSkin.IMAGE_BUTTON_ICON.getWidth();
} else {
w -= 11;
}
break;
}
return w;
}
/**
* Returns the x-location where the content should be rendered within
* a choice element given the choicegroup type.
*
* @param type choicegroup type
* @return the x-location where to start rendering choice element
* content
*/
static int getContentX(int type) {
switch (type) {
case Choice.EXCLUSIVE:
case Choice.MULTIPLE:
return ((2 * ChoiceGroupSkin.PAD_H) +
ChoiceGroupSkin.WIDTH_IMAGE);
}
return ChoiceGroupSkin.PAD_H;
}
/**
* Returns the choice image (checkbox/radio button) based on the
* passed in choicegroup type.
*
* @param type choicegroup type
* @param on boolean indicating whether to return the
* "CHOICE_ON" image or the "CHOICE_OFF" image
* @return the CHOICE_ON or CHOICE_OFF image as requested
*/
static Image getChoiceImage(int type, boolean on) {
switch (type) {
case Choice.EXCLUSIVE:
if (ChoiceGroupSkin.IMAGE_RADIO == null) {
return null;
}
return (on ? ChoiceGroupSkin.IMAGE_RADIO[1] :
ChoiceGroupSkin.IMAGE_RADIO[0]);
case Choice.MULTIPLE:
if (ChoiceGroupSkin.IMAGE_CHKBOX == null) {
return null;
}
return (on ? ChoiceGroupSkin.IMAGE_CHKBOX[1] :
ChoiceGroupSkin.IMAGE_CHKBOX[0]);
default: // IMPLICIT or POPUP
return null;
}
}
// *****************************************************
// Private methods
// *****************************************************
/**
* Calculate height of an choice group element.
*
* @param cgEl the element to calculate
* @param i index of the element
* @param availableWidth the tentative width
* @return the height under the given width
*/
private int calculateElementHeight(CGElement cgEl, int i,
int availableWidth)
{
// IMPL_NOTE there is an assumption here that text height is always
// taller then the choice image and taller then the content image
elHeights[i] = 0;
int textOffset = (cgEl.imageEl == null) ? 0 :
ChoiceGroupSkin.WIDTH_IMAGE +
ChoiceGroupSkin.PAD_H;
Font fnt = cgEl.getFont();
if (cg.fitPolicy == ChoiceGroup.TEXT_WRAP_OFF) {
elHeights[i] += fnt.getHeight();
} else {
elHeights[i] += Text.getHeightForWidth(cgEl.stringEl, fnt,
availableWidth, textOffset);
}
return elHeights[i];
}
/** ChoiceGroup associated with this ChoiceGroupLF */
ChoiceGroup cg;
/**
* The currently selected index of this ChoiceGroup (-1 by default)
*/
int selectedIndex = -1;
/**
* The currently highlighted index of this ChoiceGroup (-1 by default)
*/
int hilightedIndex = -1;
int pendingIndex = -1;
/**
* Stores the x-location of where the choice element content
* would begin.
*/
private int contentX = 0;
/**
* The array containing the individual heights of each element,
* based on the preferred layout width.
*/
int[] elHeights;
/**
* A flag indicating if traversal has occurred into this
* CG on a prior lCallTraverse. Its reset to false again
* in lCallTraverseOut().
*/
boolean traversedIn;
boolean hasFocusWhenPressed; // = false
}
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