//+------------------------------------------------------------------+ //| ListView.mqh | //| Copyright 2009-2013, MetaQuotes Software Corp. | //| http://www.mql5.com | //+------------------------------------------------------------------+ #include "WndClient.mqh" #include "Edit.mqh" #include #include //+------------------------------------------------------------------+ //| Class CListView | //| Usage: display lists | //+------------------------------------------------------------------+ class CListView : public CWndClient { private: //--- dependent controls CEdit m_rows[]; // array of the row objects //--- set up int m_offset; // index of first visible row in array of rows int m_total_view; // number of visible rows int m_item_height; // height of visible row bool m_height_variable; // признак переменной высоты списка //--- data CArrayString m_strings; // array of rows CArrayLong m_values; // array of values int m_current; // index of current row in array of rows public: CListView(void); ~CListView(void); //--- create virtual bool Create(const long chart,const string name,const int subwin,const int x1,const int y1,const int x2,const int y2); virtual void Destroy(const int reason=0); //--- chart event handler virtual bool OnEvent(const int id,const long &lparam,const double &dparam,const string &sparam); //--- set up bool TotalView(const int value); //--- fill virtual bool AddItem(const string item,const long value=0); //--- data virtual bool ItemAdd(const string item,const long value=0); virtual bool ItemInsert(const int index,const string item,const long value=0); virtual bool ItemUpdate(const int index,const string item,const long value=0); virtual bool ItemDelete(const int index); virtual bool ItemsClear(void); //--- data int Current(void) { return(m_current); } string Select(void) { return(m_strings.At(m_current)); } bool Select(const int index); bool SelectByText(const string text); bool SelectByValue(const long value); //--- data (read only) long Value(void) { return(m_values.At(m_current)); } //--- state virtual bool Show(void); protected: //--- create dependent controls bool CreateRow(const int index); //--- event handlers virtual bool OnResize(void); //--- handlers of the dependent controls events virtual bool OnVScrollShow(void); virtual bool OnVScrollHide(void); virtual bool OnScrollLineDown(void); virtual bool OnScrollLineUp(void); virtual bool OnItemClick(const int index); //--- redraw bool Redraw(void); bool RowState(const int index,const bool select); bool CheckView(void); }; //+------------------------------------------------------------------+ //| Common handler of chart events | //+------------------------------------------------------------------+ EVENT_MAP_BEGIN(CListView) ON_INDEXED_EVENT(ON_CLICK,m_rows,OnItemClick) EVENT_MAP_END(CWndClient) //+------------------------------------------------------------------+ //| Constructor | //+------------------------------------------------------------------+ CListView::CListView(void) : m_offset(0), m_total_view(0), m_item_height(CONTROLS_LIST_ITEM_HEIGHT), m_current(CONTROLS_INVALID_INDEX), m_height_variable(false) { } //+------------------------------------------------------------------+ //| Destructor | //+------------------------------------------------------------------+ CListView::~CListView(void) { } //+------------------------------------------------------------------+ //| Create a control | //+------------------------------------------------------------------+ bool CListView::Create(const long chart,const string name,const int subwin,const int x1,const int y1,const int x2,const int y2) { int y=y2; //--- if the number of visible rows is previously determined, adjust the vertical size if(!TotalView((y2-y1)/m_item_height)) y=m_item_height+y1+2*CONTROLS_BORDER_WIDTH; //--- check the number of visible rows if(m_total_view<1) return(false); //--- call method of the parent class if(!CWndClient::Create(chart,name,subwin,x1,y1,x2,y)) return(false); //--- set up if(!m_background.ColorBackground(CONTROLS_LIST_COLOR_BG)) return(false); if(!m_background.ColorBorder(CONTROLS_LIST_COLOR_BORDER)) return(false); //--- create dependent controls ArrayResize(m_rows,m_total_view); for(int i=0;i0) m_rows[i].Hide(); } //--- succeed return(true); } //+------------------------------------------------------------------+ //| Delete group of controls | //+------------------------------------------------------------------+ void CListView::Destroy(const int reason) { //--- call of the method of the parent class CWndClient::Destroy(reason); //--- clear items m_strings.Clear(); m_values.Clear(); //--- m_offset =0; m_total_view=0; } //+------------------------------------------------------------------+ //| Set parameter | //+------------------------------------------------------------------+ bool CListView::TotalView(const int value) { //--- if parameter is not equal to 0, modifications are not possible if(m_total_view!=0) { m_height_variable=true; return(false); } //--- save value m_total_view=value; //--- parameter has been changed return(true); } //+------------------------------------------------------------------+ //| Makes the control visible | //+------------------------------------------------------------------+ bool CListView::Show(void) { //--- call of the method of the parent class CWndClient::Show(); //--- number of items int total=m_strings.Total(); //--- if(total==0) total=1; //--- if(m_height_variable && total=m_strings.Total()) return(false); if(index<0 && index!=CONTROLS_INVALID_INDEX) return(false); //--- unselect if(m_current!=CONTROLS_INVALID_INDEX) RowState(m_current-m_offset,false); //--- select if(index!=CONTROLS_INVALID_INDEX) RowState(index-m_offset,true); //--- save value m_current=index; //--- succeed return(CheckView()); } //+------------------------------------------------------------------+ //| Set current item (by text) | //+------------------------------------------------------------------+ bool CListView::SelectByText(const string text) { //--- find text int index=m_strings.SearchLinear(text); //--- if text is not found, exit without changing the selection if(index==CONTROLS_INVALID_INDEX) return(false); //--- change selection return(Select(index)); } //+------------------------------------------------------------------+ //| Set current item (by value) | //+------------------------------------------------------------------+ bool CListView::SelectByValue(const long value) { //--- find value int index=m_values.SearchLinear(value); //--- if value is not found, exit without changing the selection if(index==CONTROLS_INVALID_INDEX) return(false); //--- change selection return(Select(index)); } //+------------------------------------------------------------------+ //| Redraw | //+------------------------------------------------------------------+ bool CListView::Redraw(void) { //--- loop by "rows" for(int i=0;i=ArraySize(m_rows)) return(true); //--- determine colors color text_color=(select) ? CONTROLS_LISTITEM_COLOR_TEXT_SEL : CONTROLS_LISTITEM_COLOR_TEXT; color back_color=(select) ? CONTROLS_LISTITEM_COLOR_BG_SEL : CONTROLS_LISTITEM_COLOR_BG; //--- get pointer CEdit *item=GetPointer(m_rows[index]); //--- recolor the "row" return(item.Color(text_color) && item.ColorBackground(back_color) && item.ColorBorder(back_color)); } //+------------------------------------------------------------------+ //| Check visibility of selected row | //+------------------------------------------------------------------+ bool CListView::CheckView(void) { //--- check visibility if(m_current>=m_offset && m_currentm_total_view) ? m_current : total-m_total_view; //--- adjust the scrollbar m_scroll_v.CurrPos(m_offset); //--- redraw return(Redraw()); } //+------------------------------------------------------------------+ //| Handler of resizing | //+------------------------------------------------------------------+ bool CListView::OnResize(void) { //--- call of the method of the parent class if(!CWndClient::OnResize()) return(false); //--- set up the size of "row" if(VScrolled()) OnVScrollShow(); else OnVScrollHide(); //--- succeed return(true); } //+------------------------------------------------------------------+ //| Handler of the "Show vertical scrollbar" event | //+------------------------------------------------------------------+ bool CListView::OnVScrollShow(void) { //--- loop by "rows" for(int i=0;i