ListBox.h

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#pragma once
 
#include "Component.h"
#include "Scrollbar.h"
 
class ListBoxItem
{
public:
    wstring _text;
    COLORREF _color;
    Bounds _rect;
};

class ListBox : public Component, public ScrollbarListener
{
    Scrollbar _scrollBar;
 
    std::vector<ListBoxItem> _selections;  
 
    long _maxVisibleRows;         
    __int64 _firstVisibleRow;        
    __int64 _lastVisibleRow;         
    __int64 _currentRow;             
 
    BOOL _isColorList;

    BOOL _isPopup;
    BOOL _hidePopupOnFocusLoss;
 
protected:

    BOOL getCreateWindowOptions(wstring& title, UINT& widownStyles, wstring& wndClassName, BOOL& isCustomWndProc);

    void windowCreated();
 
public:

    ListBox();

    virtual ~ListBox();
 
    int getPreferredHeight();

    void setAsPopup(BOOL isPopup, BOOL hidePopupOnFocusLoss = TRUE);

    BOOL isPopup();
 
    void setColorsListType();
 
    void clear();

    void addItem(const wstring& text, COLORREF color = Theme::BackgroundColor);
    BOOL getItem(int index, wstring& text);
    long getItemCount();

    void setSelectedItem(const wstring& text);

    wstring getSelectedItem();
 
public: // Overridables
 
    void onPaint(Graphics* g) override;
    void onWindowResized() override;
 
    void onArrowUp(BOOL shiftPressed, BOOL ctrlPressed) override;
    void onArrowDown(BOOL shiftPressed, BOOL ctrlPressed) override;
    void onPageUp(BOOL shiftPressed, BOOL ctrlPressed) override;
    void onPageDown(BOOL shiftPressed, BOOL ctrlPressed) override;
    void onKeyHome(BOOL shiftPressed, BOOL ctrlPressed) override;
    void onKeyEnd(BOOL shiftPressed, BOOL ctrlPressed) override;
 
    void onMousePressed(WinHandle hWnd, int x, int y, int clickCount, BOOL shiftPressed, BOOL ctrlPressed) override;
    void onMouseReleased(WinHandle hWnd, int x, int y, BOOL shiftPressed, BOOL ctrlPressed);
    void onMouseMoved(WinHandle hWnd, int x, int y, BOOL shiftPressed, BOOL ctrlPressed);
    BOOL onMouseWheel(WinHandle hWnd, int x, int y, int delta) override;
 
    void onFocusGained() override;
    void onFocusLost() override;
 
public:
 
    void addSelectionChangedListener(SelectionChangeListener* l);
    void addItemDoubleClickedListener(RowDoubleClickListener* l);
 
public:
 
    void scrollBarActivity(__int64 firstVisibleItem);
    void scrollBarRepaint();
};