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運用MQL程式語言 在圖表中繪製按鈕的方法

使按下按鈕的過程更加順暢

在「運用MQL程式語言在圖表中新增按鈕的方法」中，進行了新增按鈕、安裝切換顯示/隱藏符號的功能。

參考文章：運用MQL程式語言在圖表中新增按鈕的方法

接下來將定義一項DrawArrow函數，並書寫可在其中繪製箭頭的程式。

雖然與繪製start函數箭頭的內容相同，但若使用同一文法，便可能在後續修正時出現錯誤，因此需統整來使用函數。DrawArrow函數將如同以下所示進行定義。

//+——————————————————————+

//| Draw function |

//+——————————————————————+

void DrawArrow()

{

int limit = MathMin(Bars – 1, BARS);

ObjectsDeleteAll(0, “3RCI_Sign_”);

for(int i = limit; i >= 0; i–) {

if (!ObjectGetInteger(0, “Button”, OBJPROP_STATE)) continue;

bool upNow = RCI0[i] > RCI1[i] && RCI1[i] > RCI2[i];

bool upPre = RCI0[i + 1] > RCI1[i + 1] && RCI1[i + 1] > RCI2[i + 1];

bool dnNow = RCI0[i] < RCI1[i] && RCI1[i] < RCI2[i];

bool dnPre = RCI0[i + 1] < RCI1[i + 1] && RCI1[i + 1] < RCI2[i + 1];

if (upNow && !upPre) {

string name = “3RCI_Sign_” + (string)i;

ObjectCreate(0, name, OBJ_ARROW, 0, 0, 0);

ObjectSetInteger(0, name, OBJPROP_TIME, 0, Time[i]);

ObjectSetDouble(0, name, OBJPROP_PRICE, 0, Low[i]);

ObjectSetInteger(0, name, OBJPROP_ANCHOR, ANCHOR_TOP);

ObjectSetInteger(0, name, OBJPROP_WIDTH, 2);

ObjectSetInteger(0, name, OBJPROP_COLOR, clrRed);

ObjectSetInteger(0, name, OBJPROP_ARROWCODE, 233);

}

if (dnNow && !dnPre) {

string name = “3RCI_Sign_” + (string)i;

ObjectCreate(0, name, OBJ_ARROW, 0, 0, 0);

ObjectSetInteger(0, name, OBJPROP_TIME, 0, Time[i]);

ObjectSetDouble(0, name, OBJPROP_PRICE, 0, High[i]);

ObjectSetInteger(0, name, OBJPROP_ANCHOR, ANCHOR_BOTTOM);

ObjectSetInteger(0, name, OBJPROP_WIDTH, 2);

ObjectSetInteger(0, name, OBJPROP_COLOR, clrDodgerBlue);

ObjectSetInteger(0, name, OBJPROP_ARROWCODE, 234);

}

}

}

定義DrawArrow函數之後，將放置於start函數的位置。

int start()

{

int counted_bars = IndicatorCounted();

//—- check for possible errors

if(counted_bars < 0) return -1;

//—- last counted bar will be recounted

if(counted_bars > 0) counted_bars–;

int limit = MathMin(Bars – 1, BARS);

for(int i = limit; i >= 0; i–) {

RCI0[i] = iRCI(NULL, 0, PERIOD_S, i);

RCI1[i] = iRCI(NULL, 0, PERIOD_M, i);

RCI2[i] = iRCI(NULL, 0, PERIOD_L, i);

}

DrawArrow();

return 0;

}

接下來將以此設定按下按鈕時的動作。

//+——————————————————————+

//| ChartEvent function |

//+——————————————————————+

void OnChartEvent(const int id, // Event identifier

const long& lparam, // Event parameter of long type

const double& dparam, // Event parameter of double type

const string& sparam) // Event parameter of string type

{

//— the left mouse button has been pressed on the chart

if(id== CHARTEVENT_OBJECT_CLICK) {

if (sparam == “Button”) {

DrawArrow();

}

}

}

如此一來，按下按鈕時的動作將更加順暢，並能在按下的瞬間切換顯示/隱藏箭頭。

原始碼

本次製作的原始碼如以下所示。

//+——————————————————————+

//| 3RCI_Sign |

//| HT FX |

//| http://htfx.blog.fc2.com/ |

//+——————————————————————+

#property copyright “HT FX”

#property link “http://htfx.blog.fc2.com/”

#property description “Copyright (C) 2020 HT FX All Rights Reserved.\n”

#property description “http://htfx.blog.fc2.com/\n”

#property description “htfxjp@gmail.com”

#property version “1.00”

#property strict

#property indicator_separate_window

#property indicator_maximum 1

#property indicator_minimum -1

#property indicator_buffers 3

#property indicator_plots 3

#property indicator_color1 clrWhite

#property indicator_color2 clrYellow

#property indicator_color3 clrRed

#property indicator_width1 1

#property indicator_width2 1

#property indicator_width3 1

#property indicator_style1 STYLE_SOLID

#property indicator_style2 STYLE_SOLID

#property indicator_style3 STYLE_SOLID

//+——————————————————————+

//| Input parameters |

//+——————————————————————+

input int BARS = 500; //　計算K線數量

input int PERIOD_S = 10; // 短期

input int PERIOD_M = 20; // 中期

input int PERIOD_L = 50; // 長期

//— indicator buff

double RCI0[], RCI1[], RCI2[];

//+——————————————————————+

//| Custom indicator initialization function |

//+——————————————————————+

int init()

{

IndicatorSetInteger(INDICATOR_DIGITS, 6);

SetIndexStyle(0, DRAW_LINE);

SetIndexStyle(1, DRAW_LINE);

SetIndexStyle(2, DRAW_LINE);

SetIndexBuffer(0, RCI0, INDICATOR_DATA);

SetIndexBuffer(1, RCI1, INDICATOR_DATA);

SetIndexBuffer(2, RCI2, INDICATOR_DATA);

SetIndexLabel(0, “RCI(” + (string)PERIOD_S + “)”);

SetIndexLabel(1, “RCI(” + (string)PERIOD_M + “)”);

SetIndexLabel(2, “RCI(” + (string)PERIOD_L + “)”);

string name = “RCI(” + (string)PERIOD_S + “,” + (string)PERIOD_M + “,” + (string)PERIOD_L + “)”;

IndicatorSetString(INDICATOR_SHORTNAME, name);

ButtonCreate(0, “”Button””, ChartWindowFind(), 0, 15);

return 0;

}

//+——————————————————————+

//| Custom indicator deinitialization function |

//+——————————————————————+

void OnDeinit(const int reason)

{

ObjectsDeleteAll(0, “3RCI_Sign_”);

if (reason == REASON_PARAMETERS || reason == REASON_RECOMPILE || reason == REASON_REMOVE)

ObjectDelete(“Button”);

}

//+——————————————————————+

//| Custom indicator iteration function |

//+——————————————————————+

int start()

{

int counted_bars = IndicatorCounted();

//—- check for possible errors

if(counted_bars < 0) return -1;

//—- last counted bar will be recounted

if(counted_bars > 0) counted_bars–;

int limit = MathMin(Bars – 1, BARS);

for(int i = limit; i >= 0; i–) {

RCI0[i] = iRCI(NULL, 0, PERIOD_S, i);

RCI1[i] = iRCI(NULL, 0, PERIOD_M, i);

RCI2[i] = iRCI(NULL, 0, PERIOD_L, i);

}

DrawArrow();

return 0;

}

//+——————————————————————+

//| Draw function |

//+——————————————————————+

void DrawArrow()

{

int limit = MathMin(Bars – 1, BARS);

ObjectsDeleteAll(0, “3RCI_Sign_”);

for(int i = limit; i >= 0; i–) {

if (!ObjectGetInteger(0, “Button”, OBJPROP_STATE)) continue;

bool upNow = RCI0[i] > RCI1[i] && RCI1[i] > RCI2[i];

bool upPre = RCI0[i + 1] > RCI1[i + 1] && RCI1[i + 1] > RCI2[i + 1];

bool dnNow = RCI0[i] < RCI1[i] && RCI1[i] < RCI2[i];

bool dnPre = RCI0[i + 1] < RCI1[i + 1] && RCI1[i + 1] < RCI2[i + 1];

if (upNow && !upPre) {

string name = “3RCI_Sign_” + (string)i;

ObjectCreate(0, name, OBJ_ARROW, 0, 0, 0);

ObjectSetInteger(0, name, OBJPROP_TIME, 0, Time[i]);

ObjectSetDouble(0, name, OBJPROP_PRICE, 0, Low[i]);

ObjectSetInteger(0, name, OBJPROP_ANCHOR, ANCHOR_TOP);

ObjectSetInteger(0, name, OBJPROP_WIDTH, 2);

ObjectSetInteger(0, name, OBJPROP_COLOR, clrRed);

ObjectSetInteger(0, name, OBJPROP_ARROWCODE, 233);

}

if (dnNow && !dnPre) {

string name = “3RCI_Sign_” + (string)i;

ObjectCreate(0, name, OBJ_ARROW, 0, 0, 0);

ObjectSetInteger(0, name, OBJPROP_TIME, 0, Time[i]);

ObjectSetDouble(0, name, OBJPROP_PRICE, 0, High[i]);

ObjectSetInteger(0, name, OBJPROP_ANCHOR, ANCHOR_BOTTOM);

ObjectSetInteger(0, name, OBJPROP_WIDTH, 2);

ObjectSetInteger(0, name, OBJPROP_COLOR, clrDodgerBlue);

ObjectSetInteger(0, name, OBJPROP_ARROWCODE, 234);

}

}

}

//+——————————————————————+

//| ChartEvent function |

//+——————————————————————+

void OnChartEvent(const int id, // Event identifier

const long& lparam, // Event parameter of long type

const double& dparam, // Event parameter of double type

const string& sparam) // Event parameter of string type

{

//— the mouse has been clicked on the graphic object

if(id==CHARTEVENT_OBJECT_CLICK) {

if (sparam == “Button”) {

DrawArrow();

}

}

}

//+——————————————————————+

//| Create the button |

//+——————————————————————+

bool ButtonCreate(const long chart_ID=0, // chart’s ID

const string name=”Button”, // button name

const int sub_window=0, // subwindow index

const int x=0, // X coordinate

const int y=0, // Y coordinate

const int width=40, // button width

const int height=24, // button height

const ENUM_BASE_CORNER corner=CORNER_LEFT_UPPER, // chart corner for anchoring

const string text=”Sign”, // text

const string font=”Arial”, // font

const int font_size=10, // font size

const color clr=clrBlack, // text color

const color back_clr=C’236,233,216′, // background color

const color border_clr=clrNONE, // border color

const bool state=true, // pressed/released

const bool back=false, // in the background

const bool selection=false, // highlight to move

const bool hidden=true, // hidden in the object list

const long z_order=0) // priority for mouse click

{

//— reset the error value

ResetLastError();

//— create the button

if(!ObjectCreate(chart_ID,name,OBJ_BUTTON,sub_window,0,0))

{

Print(__FUNCTION__,

“: failed to create the button! Error code = “,GetLastError());

return(false);

}

//— set button coordinates

ObjectSetInteger(chart_ID,name,OBJPROP_XDISTANCE,x);

ObjectSetInteger(chart_ID,name,OBJPROP_YDISTANCE,y);

//— set button size

ObjectSetInteger(chart_ID,name,OBJPROP_XSIZE,width);

ObjectSetInteger(chart_ID,name,OBJPROP_YSIZE,height);

//— set the chart’s corner, relative to which point coordinates are defined

ObjectSetInteger(chart_ID,name,OBJPROP_CORNER,corner);

//— set the text

ObjectSetString(chart_ID,name,OBJPROP_TEXT,text);

//— set text font

ObjectSetString(chart_ID,name,OBJPROP_FONT,font);

//— set font size

ObjectSetInteger(chart_ID,name,OBJPROP_FONTSIZE,font_size);

//— set text color

ObjectSetInteger(chart_ID,name,OBJPROP_COLOR,clr);

//— set background color

ObjectSetInteger(chart_ID,name,OBJPROP_BGCOLOR,back_clr);

//— set border color

ObjectSetInteger(chart_ID,name,OBJPROP_BORDER_COLOR,border_clr);

//— display in the foreground (false) or background (true)

ObjectSetInteger(chart_ID,name,OBJPROP_BACK,back);

//— set button state

ObjectSetInteger(chart_ID,name,OBJPROP_STATE,state);

//— enable (true) or disable (false) the mode of moving the button by mouse

ObjectSetInteger(chart_ID,name,OBJPROP_SELECTABLE,selection);

ObjectSetInteger(chart_ID,name,OBJPROP_SELECTED,selection);

//— hide (true) or display (false) graphical object name in the object list

ObjectSetInteger(chart_ID,name,OBJPROP_HIDDEN,hidden);

//— set the priority for receiving the event of a mouse click in the chart

ObjectSetInteger(chart_ID,name,OBJPROP_ZORDER,z_order);

//— successful execution

return(true);

}

何種函數可書寫並可在其中繪製箭頭的程式?

DrawArrow函數，並書寫可在其中繪製箭頭的程式。

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