EwDropDown.h

00001 
00002 #ifndef EWDROPDOWN_H
00003 #define EWDROPDOWN_H
00004 
00005 #include "EwPainter.h"
00006 #include "EwWindow.h"
00007 #include "EwFunctionPointer.h"
00008 
00009 #include "DROPDOWN.h"
00010 
00011 // TODO: move to EwScrollbar.h ----------------->
00012 #include "SCROLLBAR.h"
00013 
00014 enum ewScrollBarColorIndex_t {
00015     ScrollBarColorIndexThumb = SCROLLBAR_CI_THUMB,
00016     ScrollBarColorIndexShaft = SCROLLBAR_CI_SHAFT,
00017     ScrollBarColorIndexArrow = SCROLLBAR_CI_ARROW,
00018 };
00019 // <---------------------------------------------
00020 
00021 enum ewDropDownColorIndex_t {
00022     DropDownColorIndexUnselected = DROPDOWN_CI_UNSEL,
00023     DropDownColorIndexSelected = DROPDOWN_CI_SEL,
00024     DropDownColorIndexSelFocus = DROPDOWN_CI_SELFOCUS,
00025 };
00026 
00027 /**
00028  * This is a wrapper class for the emwin DROPDOWN interface.
00029  */
00030 class EwDropDown : public EwWindow {
00031 public:
00032 
00033     EwDropDown(EwWindow* parent = 0);
00034     EwDropDown(int x, int y, int width, int height, EwWindow* parent = 0);
00035 
00036 
00037     void addString(const char* s);
00038     void collapse();
00039     void decrementSelection();
00040     void deleteItem(uint32_t idx);
00041     void expand();
00042     bool isItemDisabled(uint32_t idx);
00043     bool getItemText(uint32_t idx, char* pBuffer, int maxSize);
00044     int getNumItems();
00045     int32_t getSelectedIndex();
00046     void incrementSelection();
00047     void insertString(const char* s, uint32_t idx);
00048     void setAutoScroll(bool on);
00049     void setBackgroundColor(ewDropDownColorIndex_t idx, ewColor_t c);
00050     void setColor(ewDropDownColorIndex_t idx, ewColor_t c);
00051     void setFont(const ewFont_t* pFont);
00052     void setItemEnableState(uint32_t idx, bool enabled);
00053     void setScrollbarColor(ewScrollBarColorIndex_t idx, ewColor_t c);
00054     void setScrollbarWidth(uint32_t width);
00055     void setSelectedItem(int32_t idx);
00056     void setItemSpacing(uint32_t spacing);
00057     void setTextAlign(ewTextAlign_t align);
00058     void setTextColor(ewDropDownColorIndex_t idx, ewColor_t c);
00059     void setTextHeight(uint32_t height);
00060     void setUpMode(bool upMode);
00061 
00062     /**
00063      * Register a member function that will called when a selection
00064      * in the drop-down list has changed.
00065      *
00066      * @param tptr pointer to the object to call the member function on
00067      * @param mptr pointer to the member function to be called
00068      */
00069     template<typename T>
00070     void setSelectionChangedListener(T* tptr, void (T::*mptr)(EwWindow* w)) {
00071         if((mptr != NULL) && (tptr != NULL)) {
00072             _selChangedListener.attach(tptr, mptr);
00073         }
00074     }
00075 
00076     /**
00077      * Register a function that will called when the a selection
00078      * in the drop-down list has changed.
00079      *
00080      * @param fptr A pointer to a void function that will be called
00081      */
00082     void setSelectionChangedListener(void (*fptr)(EwWindow* w));
00083 
00084     static ewColor_t getDefaultBackgroundColor(ewDropDownColorIndex_t idx);
00085     static ewColor_t getDefaultColor(ewDropDownColorIndex_t idx);
00086     static ewColor_t getDefaultScrollbarColor(ewDropDownColorIndex_t idx);
00087     static const ewFont_t* getDefaultFont();
00088 
00089     void setDefaultBackgroundColor(ewDropDownColorIndex_t idx, ewColor_t c);
00090     static void setDefaultColor(ewDropDownColorIndex_t idx, ewColor_t c);
00091     static void setDefaultFont(const ewFont_t* pFont);
00092     static void setDefaultScrollbarColor(ewScrollBarColorIndex_t idx, ewColor_t c);
00093 
00094 private:
00095 
00096     EwFunctionPointer _selChangedListener;
00097 
00098     void init(int x, int y, int width, int height, EwWindow* parent);
00099     void handleSelectionChanged();
00100 
00101     static void _callback(WM_MESSAGE* pMsg, EwWindow* w);
00102 
00103 
00104 };
00105 
00106 #endif