PWL_ScrollBar.h revision ee451cb395940862dad63c85adfe8f2fd55e864c 
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 _PWL_SCROLLBAR_H_
8#define _PWL_SCROLLBAR_H_
9
10class CPWL_SBButton;
11class CPWL_ScrollBar;
12
13struct PWL_SCROLL_INFO
14{
15public:
16	PWL_SCROLL_INFO() : fContentMin(0.0f), fContentMax(0.0f), fPlateWidth(0.0f), fBigStep(0.0f), fSmallStep(0.0f)
17	{
18	}
19	FX_FLOAT					fContentMin;
20	FX_FLOAT					fContentMax;
21	FX_FLOAT					fPlateWidth;
22	FX_FLOAT					fBigStep;
23	FX_FLOAT					fSmallStep;
24};
25
26enum PWL_SCROLLBAR_TYPE
27{
28	SBT_HSCROLL,
29	SBT_VSCROLL
30};
31
32enum PWL_SBBUTTON_TYPE
33{
34	PSBT_MIN,
35	PSBT_MAX,
36	PSBT_POS
37};
38
39class CPWL_SBButton : public CPWL_Wnd
40{
41public:
42	CPWL_SBButton(PWL_SCROLLBAR_TYPE eScrollBarType,PWL_SBBUTTON_TYPE eButtonType);
43	virtual ~CPWL_SBButton();
44
45public:
46	virtual CFX_ByteString		GetClassName() const;
47	virtual void				OnCreate(PWL_CREATEPARAM & cp);
48	virtual void				GetThisAppearanceStream(CFX_ByteTextBuf & sAppStream);
49	virtual void				DrawThisAppearance(CFX_RenderDevice* pDevice, CPDF_Matrix* pUser2Device);
50	virtual FX_BOOL				OnLButtonDown(const CPDF_Point & point, FX_DWORD nFlag);
51	virtual FX_BOOL				OnLButtonUp(const CPDF_Point & point, FX_DWORD nFlag);
52	virtual FX_BOOL				OnMouseMove(const CPDF_Point & point, FX_DWORD nFlag);
53
54protected:
55	PWL_SCROLLBAR_TYPE			m_eScrollBarType;
56	PWL_SBBUTTON_TYPE			m_eSBButtonType;
57
58	FX_BOOL						m_bMouseDown;
59};
60
61struct PWL_FLOATRANGE
62{
63public:
64	PWL_FLOATRANGE();
65	PWL_FLOATRANGE(FX_FLOAT min,FX_FLOAT max);
66	void Default();
67	void Set(FX_FLOAT min,FX_FLOAT max);
68	FX_BOOL	In(FX_FLOAT x) const;
69	FX_FLOAT GetWidth() const;
70
71	FX_FLOAT fMin,fMax;
72};
73
74struct PWL_SCROLL_PRIVATEDATA
75{
76public:
77	PWL_SCROLL_PRIVATEDATA();
78
79	void Default();
80	void SetScrollRange(FX_FLOAT min,FX_FLOAT max);
81	void SetClientWidth(FX_FLOAT width);
82	void SetSmallStep(FX_FLOAT step);
83	void SetBigStep(FX_FLOAT step);
84	FX_BOOL SetPos(FX_FLOAT pos);
85
86	void AddSmall();
87	void SubSmall();
88	void AddBig();
89	void SubBig();
90
91	PWL_FLOATRANGE				ScrollRange;
92	FX_FLOAT					fClientWidth;
93	FX_FLOAT					fScrollPos;
94	FX_FLOAT					fBigStep;
95	FX_FLOAT					fSmallStep;
96};
97
98class CPWL_ScrollBar : public CPWL_Wnd
99{
100public:
101	CPWL_ScrollBar(PWL_SCROLLBAR_TYPE sbType = SBT_HSCROLL);
102	virtual ~CPWL_ScrollBar();
103
104public:
105	virtual CFX_ByteString		GetClassName() const;
106	virtual void				OnCreate(PWL_CREATEPARAM & cp);
107	virtual void				RePosChildWnd();
108	virtual void				GetThisAppearanceStream(CFX_ByteTextBuf & sAppStream);
109	virtual void				DrawThisAppearance(CFX_RenderDevice* pDevice, CPDF_Matrix* pUser2Device);
110
111	virtual FX_BOOL				OnLButtonDown(const CPDF_Point & point, FX_DWORD nFlag);
112	virtual FX_BOOL				OnLButtonUp(const CPDF_Point & point, FX_DWORD nFlag);
113	virtual void				OnNotify(CPWL_Wnd* pWnd, FX_DWORD msg, FX_INTPTR wParam = 0, FX_INTPTR lParam = 0);
114
115	virtual void				CreateChildWnd(const PWL_CREATEPARAM & cp);
116
117	FX_FLOAT					GetScrollBarWidth() const;
118	PWL_SCROLLBAR_TYPE			GetScrollBarType() const {return m_sbType;};
119
120	void						SetNotifyForever(FX_BOOL bForever) {m_bNotifyForever = bForever;}
121
122protected:
123	void						SetScrollRange(FX_FLOAT fMin,FX_FLOAT fMax,FX_FLOAT fClientWidth);
124	void						SetScrollPos(FX_FLOAT fPos);
125	void						MovePosButton(FX_BOOL bRefresh);
126	void						SetScrollStep(FX_FLOAT fBigStep,FX_FLOAT fSmallStep);
127	void						NotifyScrollWindow();
128	CPDF_Rect					GetScrollArea() const;
129
130private:
131	void						CreateButtons(const PWL_CREATEPARAM & cp);
132
133	void						OnMinButtonLBDown(const CPDF_Point & point);
134	void						OnMinButtonLBUp(const CPDF_Point & point);
135	void						OnMinButtonMouseMove(const CPDF_Point & point);
136
137	void						OnMaxButtonLBDown(const CPDF_Point & point);
138	void						OnMaxButtonLBUp(const CPDF_Point & point);
139	void						OnMaxButtonMouseMove(const CPDF_Point & point);
140
141	void						OnPosButtonLBDown(const CPDF_Point & point);
142	void						OnPosButtonLBUp(const CPDF_Point & point);
143	void						OnPosButtonMouseMove(const CPDF_Point & point);
144
145	FX_FLOAT					TrueToFace(FX_FLOAT);
146	FX_FLOAT					FaceToTrue(FX_FLOAT);
147
148	virtual	void				TimerProc();
149
150private:
151	PWL_SCROLLBAR_TYPE			m_sbType;
152	PWL_SCROLL_INFO				m_OriginInfo;
153	CPWL_SBButton*				m_pMinButton;
154	CPWL_SBButton*				m_pMaxButton;
155	CPWL_SBButton*				m_pPosButton;
156	PWL_SCROLL_PRIVATEDATA		m_sData;
157	FX_BOOL						m_bMouseDown;
158	FX_BOOL						m_bMinOrMax;
159	FX_BOOL						m_bNotifyForever;
160	FX_FLOAT					m_nOldPos;
161	FX_FLOAT					m_fOldPosButton;
162};
163
164#endif // !defined(AFX_PWL_SCROLLBAR_H__DCFEC082_2651_48A4_B8F3_63F1B3CC5E10__INCLUDED_)
165
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