sdascrollbar.java

很好的UI界面源码..还有自己的输入法,可以更换风格.可以学习和使用

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package cn.sda.ui;

import cn.sda.event.KeybordEvent;
import cn.sda.event.PointerEvent;
import cn.sda.event.ScrollBarChangeEvent;
import javax.microedition.lcdui.Graphics;

/**
 *
 * @author Administrator
 */
public class SDAScrollBar extends SDABaseControl {

    private byte kind = SDAConsts.ktHorizontal;
    private int borderColor = SDAConsts.clBlack;
    private int arrowWidth = 15;
    private int arrowBackColor = SDAConsts.clBtnFace;
    private int maxValue = 100;
    private int minValue = 0;
    private int value = 0;
    private int increment = 1;
    private int thumbWidth = 15;
    //点击的滚动条的位置
    private int oldScrollPointx = 0;
    private int oldScrollPointy = 0;
    //按下滚动条
    private boolean isscrollbarpointdown = false;
    //滚动事件
    private ScrollBarChangeEvent onScrollBarChange = null;

    public SDAScrollBar() {
        super();
        visible = true;
        width = 100;
        height = 15;
        backColor = SDAConsts.clWhite;
        setOnKeyUp(new KeybordEvent() {

            public void Event(SDABaseControl ctrl, int keyCode) {
                //键盘
                doKeyUp(keyCode);
            }
        });
        setOnPointerPressed(new PointerEvent() {

            public void Event(SDABaseControl ctrl, int x, int y) {
                //点
                doPointerPress(x, y);
            }
        });
        setOnPointerReleased(new PointerEvent() {

            public void Event(SDABaseControl ctrl, int x, int y) {
                //抬起
                doPointerReleased(x, y);
            }
        });
    }

    public byte getKind() {
        return kind;
    }

    public void setKind(byte kind) {
        this.kind = kind;
        paint();
    }

    public int getArrowBackColor() {
        return arrowBackColor;
    }

    public void setArrowBackColor(int arrowBackColor) {
        this.arrowBackColor = arrowBackColor;
        paint();
    }

    public int getArrowWidth() {
        return arrowWidth;
    }

    public void setArrowWidth(int arrowWidth) {
        this.arrowWidth = arrowWidth;
        paint();
    }

    public int getBorderColor() {
        return borderColor;
    }

    public void setBorderColor(int borderColor) {
        this.borderColor = borderColor;
        paint();
    }

    public int getIncrement() {
        return increment;
    }

    public void setIncrement(int increment) {
        this.increment = increment;
    }

    public int getMaxValue() {
        return maxValue;
    }

    public void setMaxValue(int maxValue) {
        if (maxValue > minValue) {
            this.maxValue = maxValue;
            setValue(value);
        }
    }

    public int getMinValue() {
        return minValue;
    }

    public void setMinValue(int minValue) {
        if (minValue < maxValue) {
            this.minValue = minValue;
            setValue(value);
        }
    }

    public int getValue() {
        return value;
    }

    public void setValue(int value) {
        if (value > maxValue) {
            value = maxValue;
        }
        if (value < minValue) {
            value = minValue;
        }
        this.value = value;
        paint();
    }

    public int getThumbWidth() {
        return thumbWidth;
    }

    public void setThumbWidth(int thumbWidth) {
        this.thumbWidth = thumbWidth;
        paint();
    }

    public void paint() {
        if (IsCanPaint()) {
            internalPaint();
        }
    }

    private void internalPaint() {
        //画
        Graphics g = form.getGraphics();
        g.setFont(getFont());
        SetClip(g);
        //框
        drawControlRect(g);
        PaintChilds();
    }

    private void drawControlRect(Graphics g) {
        int thisHeight = getHeight();
        int thisWidth = getWidth();
        g.setColor(backColor);
        fillRect(g, 0, 0, thisWidth, thisHeight);
        g.setColor(borderColor);
        drawRect(g, 0, 0, thisWidth, thisHeight);
        g.setColor(arrowBackColor);
        if (kind == SDAConsts.ktHorizontal) {
            //两边的框
            fillRect(g, 0, 0, arrowWidth, thisHeight);
            fillRect(g, thisWidth - arrowWidth, 0, arrowWidth, thisHeight);
            g.setColor(borderColor);
            drawRect(g, 0, 0, thisWidth, thisHeight);
            drawRect(g, 0, 0, arrowWidth, thisHeight);
            drawRect(g, thisWidth - arrowWidth, 0, arrowWidth, thisHeight);
            //左箭头
            g.setColor(borderColor);
            fillTriangle(g, arrowWidth / 2 - 2, thisHeight / 2, arrowWidth / 2 + 2, thisHeight / 2 - 4, arrowWidth / 2 + 2, thisHeight / 2 + 4);
            //右箭头
            fillTriangle(g, thisWidth - arrowWidth / 2 - 2, thisHeight / 2 - 4, thisWidth - arrowWidth / 2 - 2, thisHeight / 2 + 4, thisWidth - arrowWidth / 2 + 2, thisHeight / 2);
            //中间的滚动条
            int thumbLeft = (value - minValue) * (thisWidth - 2 * arrowWidth - thumbWidth) / (maxValue - minValue) + arrowWidth;
            g.setColor(arrowBackColor);
            fillRect(g, thumbLeft, 0, thumbWidth, thisHeight);
            g.setColor(borderColor);
            drawRect(g, thumbLeft, 0, thumbWidth, thisHeight);
            //竖线
            drawLine(g, thumbLeft + thumbWidth / 2 - 2, 2, thumbLeft + thumbWidth / 2 - 2, thisHeight - 2);
            drawLine(g, thumbLeft + thumbWidth / 2, 2, thumbLeft + thumbWidth / 2, thisHeight - 2);
            drawLine(g, thumbLeft + thumbWidth / 2 + 2, 2, thumbLeft + thumbWidth / 2 + 2, thisHeight - 2);
        } else {
            //两边的框
            fillRect(g, 0, 0, thisWidth, arrowWidth);
            fillRect(g, 0, thisHeight - arrowWidth, thisWidth, arrowWidth);
            g.setColor(borderColor);
            drawRect(g, 0, 0, thisWidth, thisHeight);
            drawRect(g, 0, 0, thisWidth, arrowWidth);
            drawRect(g, 0, thisHeight - arrowWidth, thisWidth, arrowWidth);
            //左箭头
            g.setColor(borderColor);
            fillTriangle(g, thisWidth / 2, arrowWidth / 2 - 2, thisWidth / 2 - 4, arrowWidth / 2 + 2, thisWidth / 2 + 4, arrowWidth / 2 + 2);
            //右箭头
            fillTriangle(g, thisWidth / 2 - 4, thisHeight - arrowWidth / 2 - 2, thisWidth / 2 + 4, thisHeight - arrowWidth / 2 - 2, thisWidth / 2, thisHeight - arrowWidth / 2 + 2);
            //中间的滚动条
            int thumbTop = (value - minValue) * (thisHeight - 2 * arrowWidth - thumbWidth) / (maxValue - minValue) + arrowWidth;
            g.setColor(arrowBackColor);
            fillRect(g, 0, thumbTop, thisWidth, thumbWidth);
            g.setColor(borderColor);
            drawRect(g, 0, thumbTop, thisWidth, thumbWidth);
            //竖线
            drawLine(g, 2, thumbTop + thumbWidth / 2 - 2, thisWidth - 2, thumbTop + thumbWidth / 2 - 2);
            drawLine(g, 2, thumbTop + thumbWidth / 2, thisWidth - 2, thumbTop + thumbWidth / 2);
            drawLine(g, 2, thumbTop + thumbWidth / 2 + 2, thisWidth - 2, thumbTop + thumbWidth / 2 + 2);
        }
        //焦点
        if (isFoucsed()) {
            g.setColor(SDAConsts.clFocusShadow);
            drawRect(g, 1, 1, thisWidth - 2, thisHeight - 2);
        }
    }

    private void doKeyUp(int keyCode) {
        String key = form.getKeyName(keyCode).toUpperCase();
        if ((key.equals(SDAConsts.KEY_LEFT) && (kind == SDAConsts.ktHorizontal)) ||
                (key.equals(SDAConsts.KEY_UP) && (kind == SDAConsts.ktVertical))) {
            //左
            if (value > minValue) {
                value -= increment;
                doScrollChange();
            }
        }
        if ((key.equals(SDAConsts.KEY_RIGHT) && (kind == SDAConsts.ktHorizontal)) ||
                (key.equals(SDAConsts.KEY_DOWN) && (kind == SDAConsts.ktVertical))) {
            //右
            if (value < maxValue) {
                value += increment;
                doScrollChange();
            }
        }
        repaintControl();
    }

    private void doPointerPress(int x, int y) {
        int posx = screenXToClient(x);
        int posy = screenYToClient(y);
        int thisHeight = getHeight();
        int thisWidth = getWidth();
        if (InClientRect(posx, posy, 0, 0, thisWidth, thisHeight)) {
            if (InClientRect(posx, posy, 0, 0, kind == SDAConsts.ktHorizontal ? arrowWidth : thisWidth,
                    kind == SDAConsts.ktHorizontal ? thisHeight : arrowWidth)) {
                if (value > minValue) {
                    value -= increment;
                    doScrollChange();
                }
            } else if (InClientRect(posx, posy, kind == SDAConsts.ktHorizontal ? thisWidth - arrowWidth : 0,
                    kind == SDAConsts.ktHorizontal ? 0 : thisHeight - arrowWidth,
                    kind == SDAConsts.ktHorizontal ? arrowWidth : thisWidth,
                    kind == SDAConsts.ktHorizontal ? thisHeight : arrowWidth)) {
                if (value < maxValue) {
                    value += increment;
                    doScrollChange();
                }
            } else {
                if (kind == SDAConsts.ktHorizontal) {
                    int thumbLeft = (value - minValue) * (thisWidth - 2 * arrowWidth - thumbWidth) / (maxValue - minValue) + arrowWidth;
                    if (InClientRect(posx, posy, thumbLeft, 0, thumbWidth, thisHeight)) {
                        //记录
                        oldScrollPointx = posx;
                        oldScrollPointy = posy;
                        isscrollbarpointdown = true;
                    } else {
                        //空白处，滚动
                        if (posx < thumbLeft) {
                            thumbLeft = posx;
                        } else {
                            thumbLeft = posx - thumbWidth;
                        }
                        value = (thumbLeft - arrowWidth) * (maxValue - minValue) / (thisWidth - 2 * arrowWidth - thumbWidth) + minValue;
                        doScrollChange();
                    }
                } else {
                    int thumbTop = (value - minValue) * (thisHeight - 2 * arrowWidth - thumbWidth) / (maxValue - minValue) + arrowWidth;
                    if (InClientRect(posx, posy, 0, thumbTop, thisWidth, thumbWidth)) {
                        //记录
                        oldScrollPointx = posx;
                        oldScrollPointy = posy;
                        isscrollbarpointdown = true;
                    } else {
                        //空白处
                        //空白处，滚动
                        if (posy < thumbTop) {
                            thumbTop = posy;
                        } else {
                            thumbTop = posy - thumbWidth;
                        }
                        value = (thumbTop - arrowWidth) * (maxValue - minValue) / (thisHeight - 2 * arrowWidth - thumbWidth) + minValue;
                        doScrollChange();
                    }
                }
            }
        }
    }

    private void doPointerReleased(int x, int y) {
        int posx = screenXToClient(x);
        int posy = screenYToClient(y);
        int thisHeight = getHeight();
        int thisWidth = getWidth();
        if (kind == SDAConsts.ktHorizontal) {
            if (isscrollbarpointdown) {
                int stepx = posx - oldScrollPointx;
                value = stepx * (maxValue - minValue) / (thisWidth - 2 * arrowWidth - thumbWidth) + value;
                if (value < minValue) {
                    value = minValue;
                }
                if (value > maxValue) {
                    value = maxValue;
                }
                doScrollChange();
            }
        }
        if (kind == SDAConsts.ktVertical) {
            if (isscrollbarpointdown) {
                int stepy = posy - oldScrollPointy;
                value = stepy * (maxValue - minValue) / (thisHeight - 2 * arrowWidth - thumbWidth) + value;
                if (value < minValue) {
                    value = minValue;
                }
                if (value > maxValue) {
                    value = maxValue;
                }
                doScrollChange();
            }
        }
        repaintControl();
        isscrollbarpointdown = false;
    }

    private void doScrollChange() {
        if (this.onScrollBarChange != null) {
            onScrollBarChange.Event(value);
        }
    }

    public void setOnScrollBarChange(ScrollBarChangeEvent onScrollBarChange) {
        this.onScrollBarChange = onScrollBarChange;
    }

    protected boolean canDownTabNext() {
        if (kind == SDAConsts.ktVertical) {
            return false;
        } else {
            return true;
        }
    }

    protected boolean canLeftTabPrior() {
        if (kind == SDAConsts.ktHorizontal) {
            return false;
        } else {
            return true;
        }
    }

    protected boolean canRightTabNext() {
        if (kind == SDAConsts.ktHorizontal) {
            return false;
        } else {
            return true;
        }
    }

    protected boolean canUpTabPrior() {
        if (kind == SDAConsts.ktVertical) {
            return false;
        } else {
            return true;
        }
    }
}