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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 
GetItemHeight()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);
GetVertScrollBar()77   CFWL_ScrollBar* GetVertScrollBar() const { return m_pVertScrollBar.get(); }
GetRTClient()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