自EditField中不显示所有键入的文本 [英] Custom editfield not displaying all typed text

问题描述

下面类是一个文本框字段。这可以被修改，使得当文本框填充有文本和用户保持键入然后将文本滚动？请告诉我现在发生的事情是，一旦文本框充满文本未显示键入任何后续文本。

感谢

 进口net.rim.device.api.ui.Color;
进口net.rim.device.api.ui.Font;
进口net.rim.device.api.ui.Graphics;
进口net.rim.device.api.ui.component.EditField;公共类CustomEditField扩展EditField中{
    在CustomEditField类//私有成员
    私人字体defaultFont;
    //用来获取默认字体
    私人字符串文本;    //用于指定表格单元格中的默认宽度    //构造函数调用父类的构造函数
    公共CustomEditField（字符串标签，字符串初值，诠释maxNumChars，
            长样式）{
        超（标签，初值，maxNumChars，风格）;
    }    //覆盖默认的get preferredWidth功能返回一个固定
    //宽
    公众诠释的get preferredWidth（）{
        defaultFont = Font.getDefault（）;
        文字=0000000000;
        返回defaultFont.getAdvance（文本）;    }    //覆盖默认的布局功能来设置表格的宽度
    // 细胞
    保护无效布局（INT宽度，高度INT）{
        宽度= GET preferredWidth（）;
        高度= super.get preferredHeight（）;
        super.layout（宽度，高度）;
        //使用超类的布局功能
        //后的宽度和高度被设置
        super.setExtent（宽度，高度）;
        //使用超类setExtent功能
        //后的宽度和高度被设置
    }    公共无效漆（图形图像）{        graphics.setBackgroundColor（Color.LIGHTBLUE）;
        super.paint（图形）;
    }}
 

解决方案

这将帮助你上手。这是，我现在用的是 ScrollableEditField的简化版本。我$ C $光盘，它的触摸BlackBerry设备面世之前，因此一些额外的工作，这里需要支持的TouchEvent 秒。

 类ScrollableEditField扩展管理器{
    私人最终静态INT DEFAULT_TOP_PADDING = 1;
    私人最终静态INT DEFAULT_BOTTOM_PADDING = 1;
    私人最终静态INT DEFAULT_LEFT_PADDING = 1;
    私人最终静态INT DEFAULT_RIGHT_PADDING = 1;    私人INT TOTAL_VERTICAL_PADDING = DEFAULT_TOP_PADDING + DEFAULT_BOTTOM_PADDING;
    私人INT TOTAL_HORIZONTAL_PADDDING = DEFAULT_LEFT_PADDING + DEFAULT_RIGHT_PADDING;    私人诠释宽度= -1;
    私人诠释高度= -1;    私人Horizo​​ntalFieldManager HFM =新Horizo​​ntalFieldManager（HORIZONTAL_SCROLL）;
    私人EditField中EF;    公共ScrollableEditField（字符串标签，字符串初值，INT maxNumChars，长innerEditFieldStyle）{
        超（NO_HORIZONTAL_SCROLL）;
        EF =新EditField中（标签，初值，maxNumChars，innerEditFieldStyle）;
        hfm.add（EF）;
        加（HFM）;
    }    保护无效sublayout（INT宽度，高度INT）{
        如果（this.width！= -1）{
            宽度= this.width;
        }        如果（this.height！= -1）{
            高度= this.height;
        }其他{
            身高= ef.getFont（）的getHeight（）。
        }        layoutChild（HFM，宽度TOTAL_HORIZONTAL_PADDDING，高度TOTAL_VERTICAL_PADDING）;
        setPositionChild（HFM，DEFAULT_LEFT_PADDING，DEFAULT_TOP_PADDING）;
        setExtent（宽度，高度）;
    }    公共EditField中getEditField（）{
        返回EF;
    }    公共无效setWidth（int width）将{
        this.width =宽度;
    }    保护无效的onfocus（INT方向）{
        super.onFocus（方向）;
        ef.setCursorPosition（0）;
    }    保护无效onUnfocus（）{
        hfm.setHorizo​​ntalScroll（0）;
        super.onUnfocus（）;
    }
};公共类ScrollableEditFieldScreen扩展MainScreen {
    公共ScrollableEditFieldScreen（）{
        超（NO_VERTICAL_SCROLL）;
        的setTitle（ScrollableEditField）;        // hfm1和hfm2在这里只是为了ScrollableEditField在屏幕的中心位置
        Horizo​​ntalFieldManager hfm1 =新Horizo​​ntalFieldManager（USE_ALL_HEIGHT | FIELD_HCENTER）;
        Horizo​​ntalFieldManager hfm2 =新Horizo​​ntalFieldManager（FIELD_VCENTER）;        //实例化滚动编辑字段，添加边框
        ScrollableEditField SEF =新ScrollableEditField（，，50，0）;
        sef.setBorder（BorderFactory.createRoundedBorder（新XYEdges（5,5,5,5）））;
        sef.setWidth（sef.getFont（）getAdvance（'0'）* 10）;        hfm2.add（SEF）;
        hfm1.add（hfm2）;
        加（hfm1）;
    }
}
 

Below class is a textbox field. Can this be modified so that when the textbox is filled with text and user keeps type the text then scrolls ? Whats happening now is that once the textbox is filled with text any subsequent text that is typed is not being displayed.

Thanks

import net.rim.device.api.ui.Color;
import net.rim.device.api.ui.Font;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.component.EditField;

public class CustomEditField extends EditField {
    // private members of the CustomEditField class
    private Font defaultFont;
    // used to get the default font
    private String text;

    // used to specify the default width of the table cells

    // constructor calls the super class constructor
    public CustomEditField(String label, String initialValue, int maxNumChars,
            long style) {
        super(label, initialValue, maxNumChars, style);
    }

    // overrides the default getPreferredWidth functionality to return a fixed
    // width
    public int getPreferredWidth() {
        defaultFont = Font.getDefault();
        text = "0000000000";
        return defaultFont.getAdvance(text);

    }

    // overrides the default layout functionality to set the width of the table
    // cell
    protected void layout(int width, int height) {
        width = getPreferredWidth();
        height = super.getPreferredHeight();
        super.layout(width, height);
        // uses the super class' layout functionality
        // after the width and the height are set
        super.setExtent(width, height);
        // uses the super class' setExtent functionality
        // after the width and the height are set
    }

    public void paint(Graphics graphics){

        graphics.setBackgroundColor(Color.LIGHTBLUE);
        super.paint(graphics);
    }

}

解决方案

This will help you to get started. It is a simplified version of the ScrollableEditField that I am using. I coded it before touch BlackBerry devices became available, therefore some additional work is required here to support TouchEvents.

class ScrollableEditField extends Manager {
    private final static int        DEFAULT_TOP_PADDING     = 1;
    private final static int        DEFAULT_BOTTOM_PADDING  = 1;
    private final static int        DEFAULT_LEFT_PADDING    = 1;
    private final static int        DEFAULT_RIGHT_PADDING   = 1; 

    private int                     TOTAL_VERTICAL_PADDING  = DEFAULT_TOP_PADDING + DEFAULT_BOTTOM_PADDING;
    private int                     TOTAL_HORIZONTAL_PADDDING = DEFAULT_LEFT_PADDING + DEFAULT_RIGHT_PADDING;

    private int                     width  = -1;
    private int                     height = -1;

    private HorizontalFieldManager  hfm = new HorizontalFieldManager(HORIZONTAL_SCROLL);
    private EditField               ef;

    public ScrollableEditField(String label, String initialValue, int maxNumChars, long innerEditFieldStyle) {
        super(NO_HORIZONTAL_SCROLL);
        ef = new EditField(label, initialValue, maxNumChars, innerEditFieldStyle);
        hfm.add(ef);
        add(hfm);
    }

    protected void sublayout(int width, int height) {
        if (this.width != -1) {
            width = this.width;
        }

        if (this.height != -1) {
            height = this.height;
        } else {
            height = ef.getFont().getHeight();
        }

        layoutChild(hfm, width-TOTAL_HORIZONTAL_PADDDING, height-TOTAL_VERTICAL_PADDING);
        setPositionChild(hfm, DEFAULT_LEFT_PADDING, DEFAULT_TOP_PADDING);
        setExtent(width, height);
    }    

    public EditField getEditField() {
        return ef;
    }

    public void setWidth(int width) {
        this.width = width;
    }

    protected void onFocus(int direction) {
        super.onFocus(direction);
        ef.setCursorPosition(0);
    }

    protected void onUnfocus() {
        hfm.setHorizontalScroll(0);
        super.onUnfocus();
    }
};

public class ScrollableEditFieldScreen extends MainScreen {
    public ScrollableEditFieldScreen() {
        super(NO_VERTICAL_SCROLL);
        setTitle("ScrollableEditField");

        // hfm1 and hfm2 are here just to position the ScrollableEditField in the center of the screen
        HorizontalFieldManager hfm1 = new HorizontalFieldManager(USE_ALL_HEIGHT | FIELD_HCENTER);
        HorizontalFieldManager hfm2 = new HorizontalFieldManager(FIELD_VCENTER);

        // instantiating the scrollable edit field and adding border
        ScrollableEditField sef = new ScrollableEditField("", "", 50, 0);
        sef.setBorder(BorderFactory.createRoundedBorder(new XYEdges(5,5,5,5)));
        sef.setWidth(sef.getFont().getAdvance('0')*10);

        hfm2.add(sef);
        hfm1.add(hfm2);
        add(hfm1);
    }
}

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