262 lines
10 KiB
MQL5
262 lines
10 KiB
MQL5
//+------------------------------------------------------------------+
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//| WndObj.mqh |
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//| Copyright 2000-2025, MetaQuotes Ltd. |
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//| https://www.mql5.com |
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//+------------------------------------------------------------------+
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#include "Wnd.mqh"
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//+------------------------------------------------------------------+
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//| Class CWndObj |
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//| Usage: base class to work with chart objects |
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//+------------------------------------------------------------------+
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class CWndObj : public CWnd
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{
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private:
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//--- flags of object
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bool m_undeletable; // "object is not deletable" flag
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bool m_unchangeable; // "object is not changeable" flag
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bool m_unmoveable; // "object is not movable" flag
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protected:
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//--- parameters of the chart object
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string m_text; // object text
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color m_color; // object color
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color m_color_background; // object background color
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color m_color_border; // object border color
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string m_font; // object font
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int m_font_size; // object font size
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long m_zorder; // Z order
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public:
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CWndObj(void);
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~CWndObj(void);
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//--- chart event handler
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virtual bool OnEvent(const int id,const long &lparam,const double &dparam,const string &sparam);
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//--- set up the object
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string Text(void) const { return(m_text); }
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bool Text(const string value);
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color Color(void) const { return(m_color); }
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bool Color(const color value);
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color ColorBackground(void) const { return(m_color_background); }
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bool ColorBackground(const color value);
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color ColorBorder(void) const { return(m_color_border); }
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bool ColorBorder(const color value);
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string Font(void) const { return(m_font); }
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bool Font(const string value);
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int FontSize(void) const { return(m_font_size); }
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bool FontSize(const int value);
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long ZOrder(void) const { return(m_zorder); }
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bool ZOrder(const long value);
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protected:
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//--- handlers of object events
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virtual bool OnObjectCreate(void);
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virtual bool OnObjectChange(void);
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virtual bool OnObjectDelete(void);
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virtual bool OnObjectDrag(void);
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//--- handlers of object settings
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virtual bool OnSetText(void) { return(true); }
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virtual bool OnSetColor(void) { return(true); }
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virtual bool OnSetColorBackground(void) { return(true); }
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virtual bool OnSetColorBorder(void) { return(true); }
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virtual bool OnSetFont(void) { return(true); }
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virtual bool OnSetFontSize(void) { return(true); }
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virtual bool OnSetZOrder(void) { return(true); }
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//--- internal event handlers
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virtual bool OnDestroy(void) { return(ObjectDelete(m_chart_id,m_name)); }
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virtual bool OnChange(void);
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};
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//+------------------------------------------------------------------+
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//| Common handler of chart events |
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//+------------------------------------------------------------------+
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bool CWndObj::OnEvent(const int id,const long &lparam,const double &dparam,const string &sparam)
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{
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if(m_name==sparam)
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{
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//--- object name and string parameters are equal
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//--- this means that event should be handled
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switch(id)
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{
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case CHARTEVENT_OBJECT_CREATE: return(OnObjectCreate());
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case CHARTEVENT_OBJECT_CHANGE: return(OnObjectChange());
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case CHARTEVENT_OBJECT_DELETE: return(OnObjectDelete());
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case CHARTEVENT_OBJECT_DRAG : return(OnObjectDrag());
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}
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}
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//--- event was not handled
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return(CWnd::OnEvent(id,lparam,dparam,sparam));
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}
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//+------------------------------------------------------------------+
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//| Constructor |
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//+------------------------------------------------------------------+
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CWndObj::CWndObj(void) : m_color(clrNONE),
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m_color_background(clrNONE),
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m_color_border(clrNONE),
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m_font(CONTROLS_FONT_NAME),
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m_font_size(CONTROLS_FONT_SIZE),
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m_zorder(0),
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m_undeletable(true),
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m_unchangeable(true),
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m_unmoveable(true)
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{
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}
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//+------------------------------------------------------------------+
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//| Destructor |
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//+------------------------------------------------------------------+
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CWndObj::~CWndObj(void)
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{
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}
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//+------------------------------------------------------------------+
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//| Set the "Text" parameter |
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//+------------------------------------------------------------------+
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bool CWndObj::Text(const string value)
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{
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//--- save new value of parameter
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m_text=value;
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//--- call virtual event handler
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return(OnSetText());
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}
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//+------------------------------------------------------------------+
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//| Set the "Color" parameter |
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//+------------------------------------------------------------------+
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bool CWndObj::Color(const color value)
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{
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//--- save new value of parameter
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m_color=value;
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//--- call virtual event handler
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return(OnSetColor());
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}
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//+------------------------------------------------------------------+
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//| Setting the "Background color" parameter |
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//+------------------------------------------------------------------+
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bool CWndObj::ColorBackground(const color value)
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{
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//--- save new value of parameter
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m_color_background=value;
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//--- call virtual event handler
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return(OnSetColorBackground());
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}
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//+------------------------------------------------------------------+
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//| Set the "Border color" parameter |
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//+------------------------------------------------------------------+
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bool CWndObj::ColorBorder(const color value)
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{
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//--- save new value of parameter
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m_color_border=value;
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//--- call virtual event handler
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return(OnSetColorBorder());
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}
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//+------------------------------------------------------------------+
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//| Set the "Font" parameter |
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//+------------------------------------------------------------------+
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bool CWndObj::Font(const string value)
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{
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//--- save new value of parameter
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m_font=value;
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//--- call virtual event handler
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return(OnSetFont());
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}
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//+------------------------------------------------------------------+
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//| Set the "Font size" parameter |
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//+------------------------------------------------------------------+
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bool CWndObj::FontSize(const int value)
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{
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//--- save new value of parameter
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m_font_size=value;
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//--- call virtual event handler
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return(OnSetFontSize());
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}
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//+------------------------------------------------------------------+
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//| Set the "Z order" parameter |
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//+------------------------------------------------------------------+
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bool CWndObj::ZOrder(const long value)
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{
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//--- save new value of parameter
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m_zorder=value;
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//--- call virtual event handler
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return(OnSetZOrder());
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}
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//+------------------------------------------------------------------+
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//| Handler of the "Object creation" event |
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//+------------------------------------------------------------------+
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bool CWndObj::OnObjectCreate(void)
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{
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//--- event is handled
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return(true);
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}
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//+------------------------------------------------------------------+
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//| Handler of the "Object modification" event |
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//+------------------------------------------------------------------+
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bool CWndObj::OnObjectChange(void)
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{
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//--- if object is not changeable
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if(m_unchangeable)
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{
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//--- restore position
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if(!OnMove())
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return(false);
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//--- restore size
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if(!OnResize())
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return(false);
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//--- restore settings
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if(!OnChange())
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return(false);
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}
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//--- event is handled
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return(true);
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}
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//+------------------------------------------------------------------+
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//| Handler of the "Object deletion" event |
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//+------------------------------------------------------------------+
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bool CWndObj::OnObjectDelete(void)
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{
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//--- if object is not deletable
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if(m_undeletable)
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{
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//--- restore the object
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if(!OnCreate())
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return(false);
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//--- restore settings
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if(!OnChange())
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return(false);
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//--- restore visibility
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return(IS_VISIBLE ? OnShow():OnHide());
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}
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//--- event is handled
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return(true);
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}
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//+------------------------------------------------------------------+
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//| Handler of the "Object dragging" event |
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//+------------------------------------------------------------------+
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bool CWndObj::OnObjectDrag(void)
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{
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//--- if object is not movable
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if(m_unmoveable)
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{
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//--- restore position
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return(OnMove());
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}
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//--- event is handled
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return(true);
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}
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//+------------------------------------------------------------------+
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//| Set up the object |
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//+------------------------------------------------------------------+
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bool CWndObj::OnChange(void)
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{
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//--- set up the chart object according to previously set parameters
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if(!OnSetText())
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return(false);
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if(!OnSetFont())
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return(false);
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if(!OnSetFontSize())
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return(false);
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if(!OnSetColor())
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return(false);
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if(!OnSetColorBackground())
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return(false);
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if(!OnSetColorBorder())
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return(false);
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//--- succeed
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return(true);
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}
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//+------------------------------------------------------------------+
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