void sortBlocks(xVector v)
{
MoneyVol smallest;
int smallestIdx;
for (int i = 0; i < v.size() - 1; i++)
{
smallest = (MoneyVol)v.elementAt(i);
smallestIdx = i;
for (int j = i; j < v.size(); j++)
{
MoneyVol mv = (MoneyVol)v.elementAt(j);
if (smallest.price > mv.price)
{
smallest = mv;
smallestIdx = j;
}
}
v.swap(i, smallestIdx);
}
}
override public void render(xGraphics g)
{
g.setColor(C.COLOR_BLACK);
g.clear();
// title
xVector v = getMoneyVolumeArray();
if (v == null || v.size() == 0)
{
return;
}
int biggest = 0;
int i = 0;
for (i = 0; i < v.size(); i++)
{
MoneyVol mv = (MoneyVol)v.elementAt(i);
if (mv.volume > biggest)
{
biggest = mv.volume;
}
}
float rx;
StringBuilder sb = Utils.sb;
uint color;
int itemH = (getH() - 18) / v.size() - 4;
int y = 4;
int x = 60;
stPriceboardState ps = mContext.mPriceboard.getPriceboard(mShareID);
if (ps == null)
{
return;
}
Font f = mContext.getFontSmall();
int x1 = g.getStringWidth(f, "444.44") + 2;
int w0 = getW() - x1;
string s;
g.setColor(C.COLOR_GRAY_DARK);
g.fillRect(0, 0, x1, 14);
g.setColor(C.COLOR_WHITE);
g.drawString(f, "Giá", 2, 0);
g.setColor(C.COLOR_GRAY_DARK);
g.fillRect(x1 + 2, 0, getW() - x1 - 5, 14);
g.setColor(C.COLOR_WHITE);
g.drawString(f, "Khối lượng", x1 + 4, 0);
y = 18;
for (i = 0; i < v.size(); i++)
{
MoneyVol mv = (MoneyVol)v.elementAt(i);
sb.Length = 0;
sb.AppendFormat("{0:F2}", (float)mv.price);
// gia
g.setColor(C.COLOR_GRAY_DARK);
g.fillRect(0, y, x1, itemH);
g.setColor(0xffffffff);
g.drawString(f, sb.ToString(), 2, y);
if (x1 == 0)
{
x1 = g.getStringWidth(f, sb.ToString());
}
// column
color = mContext.valToColorF(mv.price, ps.getCe(), ps.getRef(), ps.getFloor());
g.setColor(color);
float w = ((float)mv.volume / biggest) * (w0 - 10);
g.fillRect(2 + x1, y, (int)w, itemH);
// volume
s = Utils.formatNumber(mv.volume);
sb.Length = 0;
sb.AppendFormat("kl={0:}", s);
s = sb.ToString();
int w2 = g.getStringWidth(f, s) + 2;
g.setColor(C.COLOR_GRAY_DARK);
g.fillRect(4 + x1, y, w2, 14);
g.setColor(C.COLOR_ORANGE);
g.drawString(f, s, 5 + x1, y);
y += itemH + 3;
}
}
public xVector getMoneyVolumeArray()
{
//=================================
TradeHistory trade = mContext.getTradeHistory(mShareID);
if (trade == null)
{
return(null);
}
xVector v = new xVector(20); // MoneyVolume
int total = 0;
int lastVol = 0;
for (int i = 0; i < trade.getTransactionCount(); i++)
{
float price = trade.getPrice(i);
//int vol = trade.getTradeVolume(i);
int vol = trade.getVolume(i);
total += (vol - lastVol);
bool ok = false;
MoneyVol mv;
for (int j = 0; j < v.size(); j++)
{
mv = (MoneyVol)v.elementAt(j);
if (mv.price == price)
{
mv.volume += (vol - lastVol);//vol;
ok = true;
break;
}
}
if (!ok)
{
mv = new MoneyVol();
mv.price = price;
mv.volume = (vol - lastVol);//vol;
v.addElement(mv);
}
lastVol = vol;
}
int tryCnt = 0;
while (v.size() > 10)
{
tryCnt++;
if (tryCnt > 100)
{
break;
}
sortBlocks(v);
// find the closest blocks
float smallest = 0;
int smallestIdx = -1;
for (int i = 1; i < v.size(); i++)
{
MoneyVol m1 = (MoneyVol)v.elementAt(i);
MoneyVol m0 = (MoneyVol)v.elementAt(i - 1);
if (smallest == 0)
{
smallest = Math.Abs(m1.price - m0.price);
smallestIdx = i;
}
if (Math.Abs(m1.price - m0.price) < smallest)
{
smallest = Math.Abs(m1.price - m0.price);
smallestIdx = i;
}
}
if (smallestIdx > 0)
{
MoneyVol m1 = (MoneyVol)v.elementAt(smallestIdx);
MoneyVol m0 = (MoneyVol)v.elementAt(smallestIdx - 1);
v.removeElementAt(smallestIdx);
v.removeElementAt(smallestIdx - 1);
if (m1.volume > m0.volume)
{
m1.volume += m0.volume;
v.addElement(m1);
}
else
{
m0.volume += m1.volume;
v.addElement(m0);
}
}
}
/*
* while (v.size() > 10) // too many
* {
* xVector vv = new xVector(20);
* int remain = 1;
* if ((v.size() % 2) == 0)
* remain = 2;
*
* int removingItem = v.size() - 10;
*
* for (int i = 0; i < v.size()-1; i+=2)
* {
* MoneyVol m0 = (MoneyVol)v.elementAt(i);
* MoneyVol m1 = (MoneyVol)v.elementAt(i+1);
*
* m0.volume += m1.volume;
* m0.price = m1.price < m0.price?m0.price:m1.price;
*
* vv.addElement(m0);
*
* removingItem--;
* if (removingItem <= 0)
* {
* i += 2;
* for (; i < v.size() - 1; i++)
* {
* vv.addElement(v.elementAt(i));
* }
* break;
* }
* }
* // always keep the last elements
* if (remain == 2)
* vv.addElement(v.elementAt(v.size()-2));
* vv.addElement(v.lastElement());
*
* v = vv;
* }
*/
sortBlocks(v);
return(v);
}
