ListFieldの動作がおかしいので、BB開発の経験はあまりありませんが、インターネットでの検索が多いと、次のようになりました。私はこのチュートリアルを使用 して、ListFieldの多くの作業を行いました。
これは、最初に画面を開いて他に何もしなかったときのスクリーンショットです。
これは、1つ下にスクロールしたときのスクリーンショットです。これは、すべてのフィールドに同じ効果があります。
これは、上記のチュートリアルに基づいてニーズに合わせて調整された実装です。
private Bitmap p1;
TableRowManager row;
Vector rows;
public ImageListField(List list) {
/* Init & Declaration */
setEmptyString("This ListField has No Data", DrawStyle.HCENTER);
setCallback(this);
setRowHeight(50);
Font.getDefault();
p1 = Bitmap.getBitmapResource("no-image.png");
rows = new Vector();
for (int x = 0; x < list.size(); ++x) {
Event e = (Event)list.getAt(x);
row = new TableRowManager();
BitmapField myImageField = new BitmapField(p1);
row.add(myImageField);
row.add(new LabelField(e.Name,
DrawStyle.ELLIPSIS | FOCUSABLE){
public void paint(Graphics g) {
g.setBackgroundColor(Color.BLACK);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(Color.WHITE);
g.clear();
super.paint(g);
}
});
if(e.DateFrom.compareTo(e.DateTo) == 0)
{
row.add(new LabelField(e.DateFrom,
DrawStyle.ELLIPSIS | FOCUSABLE){
public void paint(Graphics g) {
g.setBackgroundColor(Color.BLACK);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(Color.WHITE);
g.clear();
super.paint(g);
}
});
}
else
{
row.add(new LabelField(e.DateFrom + " - " + e.DateTo,
DrawStyle.ELLIPSIS | FOCUSABLE){
public void paint(Graphics g) {
g.setBackgroundColor(Color.BLACK);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(Color.WHITE);
g.clear();
super.paint(g);
}
});
}
if(e.TimeFrom.compareTo(e.TimeTo) == 0)
{
row.add(new LabelField(e.TimeFrom,
DrawStyle.ELLIPSIS | FOCUSABLE){
public void paint(Graphics g) {
g.setBackgroundColor(Color.BLACK);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(Color.WHITE);
g.clear();
super.paint(g);
}
});
}
else
{
row.add(new LabelField(e.TimeFrom + " - " + e.TimeTo,
DrawStyle.ELLIPSIS | FOCUSABLE){
public void paint(Graphics g) {
g.setBackgroundColor(Color.BLACK);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(Color.WHITE);
g.clear();
super.paint(g);
}
});
}
row.add(new LabelField(e.Address,
DrawStyle.ELLIPSIS | FOCUSABLE){
public void paint(Graphics g) {
g.setBackgroundColor(Color.BLACK);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(Color.WHITE);
g.clear();
super.paint(g);
}
});
row.add(new LabelField("R " + e.EntranceFee,
DrawStyle.ELLIPSIS | FOCUSABLE){
public void paint(Graphics g) {
g.setBackgroundColor(Color.BLACK);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(Color.WHITE);
g.clear();
super.paint(g);
}
});
rows.addElement(row);
}
setSize(rows.size());
}
public void drawListRow(ListField listField, Graphics graphics, int index,
int y, int width) {
// TODO Auto-generated method stub
ImageListField list = (ImageListField) listField;
TableRowManager rowManager = (TableRowManager) list.rows
.elementAt(index);
rowManager.drawRow(graphics, 0, y, width, 119);
}
public Object get(ListField listField, int index) {
// TODO Auto-generated method stub
return rows.elementAt(index).toString();
}
public int getPreferredWidth(ListField listField) {
// TODO Auto-generated method stub
return Graphics.getScreenWidth();
}
public int getRowHeight() {
// TODO Auto-generated method stub
return 119;
}
public int getRowHeight(int arg0) {
// TODO Auto-generated method stub
return 119;
}
public int indexOfList(ListField listField, String prefix, int start) {
// TODO Auto-generated method stub
return -1;
}
protected boolean trackwheelClick(int status, int time) {
int index = getSelectedIndex();
Dialog.inform(Integer.toString(index));
return true;
}
private class TableRowManager extends Manager {
public TableRowManager() {
super(0);
}
// Causes the fields within this row manager to be layed out then
// painted.
public void drawRow(Graphics g, int x, int y, int width, int height) {
// Arrange the cell fields within this row manager.
layout(width, height);
// Place this row manager within its enclosing list.
setPosition(x, y);
// Apply a translating/clipping transformation to the graphics
// context so that this row paints in the right area.
g.pushRegion(getExtent());
// Paint this manager's controlled fields.
subpaint(g);
g.setColor(0xFF0000);
g.drawLine(0, height - 1, getPreferredWidth(), height - 1);
g.drawLine(40, 0, 40, getPreferredHeight());
// Restore the graphics context.
g.popContext();
}
// Arrages this manager's controlled fields from left to right within
// the enclosing table's columns.
protected void sublayout(int width, int height) {
// set the size and position of each field.
int fontHeight = Font.getDefault().getHeight();
int preferredWidth = getPreferredWidth();
// start with the Bitmap Field of the priority icon
Field field = getField(0);
layoutChild(field, 75, 75);
setPositionChild(field, 5, 5);
// set the task name label field
field = getField(1);
layoutChild(field, preferredWidth, fontHeight + 2);
setPositionChild(field, 85, 5);
// set the list name label field
field = getField(2);
layoutChild(field, preferredWidth, fontHeight + 2);
setPositionChild(field, 85, fontHeight + 6 + 5);
// set the due time name label field
field = getField(3);
layoutChild(field, preferredWidth, fontHeight + 2);
setPositionChild(field, 100, fontHeight + fontHeight + 8 + 5);
field = getField(4);
layoutChild(field, preferredWidth, fontHeight + 2);
setPositionChild(field, 100, fontHeight + fontHeight + fontHeight + 10 + 5);
field = getField(5);
layoutChild(field, preferredWidth, fontHeight + 2);
setPositionChild(field, 100, fontHeight + fontHeight + fontHeight + fontHeight + 12 + 5);
setExtent(preferredWidth, getPreferredHeight());
}
// The preferred width of a row is defined by the list renderer.
public int getPreferredWidth() {
return Graphics.getScreenWidth();
}
// The preferred height of a row is the "row height" as defined in the
// enclosing list.
public int getPreferredHeight() {
return 119;// getRowHeight();
}
}
行の高さと位置の変更に関するアドバイスをいただければ幸いです。
ところで、これはシミュレーターにあります。