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