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      1 // Copyright 2014 PDFium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
      6 
      7 #ifndef XFA_FWL_CFWL_LISTBOX_H_
      8 #define XFA_FWL_CFWL_LISTBOX_H_
      9 
     10 #include <memory>
     11 #include <vector>
     12 
     13 #include "xfa/fwl/cfwl_edit.h"
     14 #include "xfa/fwl/cfwl_event.h"
     15 #include "xfa/fwl/cfwl_listbox.h"
     16 #include "xfa/fwl/cfwl_listitem.h"
     17 #include "xfa/fwl/cfwl_widget.h"
     18 #include "xfa/fwl/cfwl_widgetproperties.h"
     19 
     20 #define FWL_STYLEEXT_LTB_MultiSelection (1L << 0)
     21 #define FWL_STYLEEXT_LTB_LeftAlign (0L << 4)
     22 #define FWL_STYLEEXT_LTB_CenterAlign (1L << 4)
     23 #define FWL_STYLEEXT_LTB_RightAlign (2L << 4)
     24 #define FWL_STYLEEXT_LTB_AlignMask (3L << 4)
     25 #define FWL_STYLEEXT_LTB_ShowScrollBarFocus (1L << 10)
     26 #define FWL_ITEMSTATE_LTB_Selected (1L << 0)
     27 #define FWL_ITEMSTATE_LTB_Focused (1L << 1)
     28 
     29 class CFWL_MessageKillFocus;
     30 class CFWL_MessageMouse;
     31 class CFWL_MessageMouseWheel;
     32 class CFX_DIBitmap;
     33 
     34 class CFWL_ListBox : public CFWL_Widget {
     35  public:
     36   explicit CFWL_ListBox(const CFWL_App* pApp,
     37                         std::unique_ptr<CFWL_WidgetProperties> properties,
     38                         CFWL_Widget* pOuter);
     39   ~CFWL_ListBox() override;
     40 
     41   // CFWL_Widget
     42   FWL_Type GetClassID() const override;
     43   void Update() override;
     44   FWL_WidgetHit HitTest(const CFX_PointF& point) override;
     45   void DrawWidget(CXFA_Graphics* pGraphics, const CFX_Matrix& matrix) override;
     46   void SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) override;
     47   void OnProcessMessage(CFWL_Message* pMessage) override;
     48   void OnProcessEvent(CFWL_Event* pEvent) override;
     49   void OnDrawWidget(CXFA_Graphics* pGraphics,
     50                     const CFX_Matrix& matrix) override;
     51 
     52   int32_t CountItems(const CFWL_Widget* pWidget) const;
     53   CFWL_ListItem* GetItem(const CFWL_Widget* pWidget, int32_t nIndex) const;
     54   int32_t GetItemIndex(CFWL_Widget* pWidget, CFWL_ListItem* pItem);
     55 
     56   CFWL_ListItem* AddString(const WideStringView& wsAdd);
     57   void RemoveAt(int32_t iIndex);
     58   void DeleteString(CFWL_ListItem* pItem);
     59   void DeleteAll();
     60 
     61   int32_t CountSelItems();
     62   CFWL_ListItem* GetSelItem(int32_t nIndexSel);
     63   int32_t GetSelIndex(int32_t nIndex);
     64   void SetSelItem(CFWL_ListItem* hItem, bool bSelect);
     65 
     66   float GetItemHeight() const { return m_fItemHeight; }
     67   float CalcItemHeight();
     68 
     69  protected:
     70   CFWL_ListItem* GetListItem(CFWL_ListItem* hItem, uint32_t dwKeyCode);
     71   void SetSelection(CFWL_ListItem* hStart, CFWL_ListItem* hEnd, bool bSelected);
     72   CFWL_ListItem* GetItemAtPoint(const CFX_PointF& point);
     73   bool ScrollToVisible(CFWL_ListItem* hItem);
     74   void InitVerticalScrollBar();
     75   void InitHorizontalScrollBar();
     76   bool IsShowScrollBar(bool bVert);
     77   CFWL_ScrollBar* GetVertScrollBar() const { return m_pVertScrollBar.get(); }
     78   const CFX_RectF& GetRTClient() const { return m_rtClient; }
     79 
     80  private:
     81   void SetSelectionDirect(CFWL_ListItem* hItem, bool bSelect);
     82   bool IsMultiSelection() const;
     83   bool IsItemSelected(CFWL_ListItem* hItem);
     84   void ClearSelection();
     85   void SelectAll();
     86   CFWL_ListItem* GetFocusedItem();
     87   void SetFocusItem(CFWL_ListItem* hItem);
     88   void DrawBkground(CXFA_Graphics* pGraphics,
     89                     IFWL_ThemeProvider* pTheme,
     90                     const CFX_Matrix* pMatrix);
     91   void DrawItems(CXFA_Graphics* pGraphics,
     92                  IFWL_ThemeProvider* pTheme,
     93                  const CFX_Matrix* pMatrix);
     94   void DrawItem(CXFA_Graphics* pGraphics,
     95                 IFWL_ThemeProvider* pTheme,
     96                 CFWL_ListItem* hItem,
     97                 int32_t Index,
     98                 const CFX_RectF& rtItem,
     99                 const CFX_Matrix* pMatrix);
    100   void DrawStatic(CXFA_Graphics* pGraphics, IFWL_ThemeProvider* pTheme);
    101   CFX_SizeF CalcSize(bool bAutoSize);
    102   void UpdateItemSize(CFWL_ListItem* hItem,
    103                       CFX_SizeF& size,
    104                       float fWidth,
    105                       float fHeight,
    106                       bool bAutoSize) const;
    107   float GetMaxTextWidth();
    108   float GetScrollWidth();
    109 
    110   void OnFocusChanged(CFWL_Message* pMsg, bool bSet);
    111   void OnLButtonDown(CFWL_MessageMouse* pMsg);
    112   void OnLButtonUp(CFWL_MessageMouse* pMsg);
    113   void OnMouseWheel(CFWL_MessageMouseWheel* pMsg);
    114   void OnKeyDown(CFWL_MessageKey* pMsg);
    115   void OnVK(CFWL_ListItem* hItem, bool bShift, bool bCtrl);
    116   bool OnScroll(CFWL_ScrollBar* pScrollBar,
    117                 CFWL_EventScroll::Code dwCode,
    118                 float fPos);
    119 
    120   CFX_RectF m_rtClient;
    121   CFX_RectF m_rtStatic;
    122   CFX_RectF m_rtConent;
    123   std::unique_ptr<CFWL_ScrollBar> m_pHorzScrollBar;
    124   std::unique_ptr<CFWL_ScrollBar> m_pVertScrollBar;
    125   FDE_TextStyle m_dwTTOStyles;
    126   FDE_TextAlignment m_iTTOAligns;
    127   CFWL_ListItem* m_hAnchor;
    128   float m_fItemHeight;
    129   float m_fScorllBarWidth;
    130   bool m_bLButtonDown;
    131   IFWL_ThemeProvider* m_pScrollBarTP;
    132   std::vector<std::unique_ptr<CFWL_ListItem>> m_ItemArray;
    133 };
    134 
    135 #endif  // XFA_FWL_CFWL_LISTBOX_H_
    136