summaryrefslogtreecommitdiff
path: root/include/vcl/seleng.hxx
blob: 580ae74177bf585ded3e5f4dbc6d444ee1287ae4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#ifndef INCLUDED_VCL_SELENG_HXX
#define INCLUDED_VCL_SELENG_HXX

#include <vcl/dllapi.h>
#include <vcl/timer.hxx>
#include <vcl/event.hxx>
#include <vcl/vclenum.hxx>
#include <o3tl/typed_flags_set.hxx>

class CommandEvent;

namespace vcl {
    class Window;
}

// Timerticks
#define SELENG_DRAGDROP_TIMEOUT     400
#define SELENG_AUTOREPEAT_INTERVAL  50
#define SELENG_AUTOREPEAT_INTERVAL_MIN 25
#define SELENG_AUTOREPEAT_INTERVAL_MAX 300

class VCL_DLLPUBLIC FunctionSet
{
public:
    virtual ~FunctionSet() = 0;

    virtual void    BeginDrag() = 0;

    virtual void    CreateAnchor() = 0;  // Anker-Pos := Cursor-Pos
    virtual void    DestroyAnchor() = 0;

    // move cursor, at the same time match cursor position to the selection
    // starting at anchor. true == Ok
    virtual void    SetCursorAtPoint( const Point& rPointPixel,
                                          bool bDontSelectAtCursor = false ) = 0;

    virtual bool    IsSelectionAtPoint( const Point& rPointPixel ) = 0;
    virtual void        DeselectAtPoint( const Point& rPointPixel ) = 0;
    // delete anchor & deselect all
    virtual void        DeselectAll() = 0;
};


enum class SelectionEngineFlags {
    DRG_ENAB     = 0x0001,
    IN_SEL       = 0x0002,
    IN_ADD       = 0x0004,
    ADD_ALW      = 0x0008,
    HAS_ANCH     = 0x0020,
    CMDEVT       = 0x0040,
    WAIT_UPEVT   = 0x0080,
    EXPANDONMOVE = 0x0100,
};
namespace o3tl
{
    template<> struct typed_flags<SelectionEngineFlags> : is_typed_flags<SelectionEngineFlags, 0x01ef> {};
}

class VCL_DLLPUBLIC SelectionEngine
{
private:
    FunctionSet*        pFunctionSet;
    VclPtr<vcl::Window> pWin;
    tools::Rectangle           aArea;
    Timer               aWTimer; // generate fake mouse moves
    MouseEvent          aLastMove;
    SelectionMode       eSelMode;
    sal_uLong               nUpdateInterval;
    sal_uInt16              nLockedMods;
    SelectionEngineFlags    nFlags;
    DECL_DLLPRIVATE_LINK( ImpWatchDog, Timer*, void );

    inline bool         ShouldDeselect( bool bModifierKey1 ) const;
                                // determines to deselect or not when Ctrl-key is pressed on CursorPosChanging
public:

                        SelectionEngine( vcl::Window* pWindow,
                                         FunctionSet* pFunctions = nullptr );
                        ~SelectionEngine();
                        // Avoid implicitly defined copy constructors/assignments for the
                        // DLLPUBLIC class (they may require forward-declared classes used
                        // internally to be defined in places using SelectionEngine)
                        SelectionEngine(const SelectionEngine&) = delete;
                        SelectionEngine(SelectionEngine&&) = delete;
                        SelectionEngine& operator=(const SelectionEngine&) = delete;
                        SelectionEngine& operator=(SelectionEngine&&) = delete;

    // true: Event was processed by Selection Engine
    bool                SelMouseButtonDown( const MouseEvent& rMEvt );
    bool                SelMouseButtonUp( const MouseEvent& rMEvt );
    bool                SelMouseMove( const MouseEvent& rMEvt );
    //SelMouseButtonDown captures mouse events, SelMouseButtonUp
    //releases the capture. If you need to release the mouse
    //capture after SelMouseButtonDown but before
    //SelMouseButtonUp, e.g. to allow events to go to a
    //context menu via "Command" which is delivered after
    //mouse down but before mouse up, then use this
    void                ReleaseMouse();
    void                CaptureMouse();

    // Keyboard
    void                CursorPosChanging( bool bShift, bool bMod1 );

    // is needed to generate a Move event via a Timer
    // when the mouse is outside the area
    void                SetVisibleArea( const tools::Rectangle& rNewArea )
                            { aArea = rNewArea; }

    void                SetAddMode( bool);
    bool                IsAddMode() const;

    void                AddAlways( bool bOn );
    bool                IsAlwaysAdding() const;

    void                EnableDrag( bool bOn );

    void                SetSelectionMode( SelectionMode eMode );
    SelectionMode       GetSelectionMode() const { return eSelMode; }

    void                SetFunctionSet( FunctionSet* pFuncs )
                            { pFunctionSet = pFuncs; }
    const FunctionSet*  GetFunctionSet() const { return pFunctionSet; }

    const Point&        GetMousePosPixel() const
                            { return aLastMove.GetPosPixel(); }
    const MouseEvent&   GetMouseEvent() const { return aLastMove; }

    void                SetWindow( vcl::Window*);
    vcl::Window*             GetWindow() const { return pWin; }

    void                LockModifiers( sal_uInt16 nModifiers )
                            { nLockedMods = nModifiers; }
    sal_uInt16              GetLockedModifiers() const { return nLockedMods; }

    bool                IsInSelection() const;
    void                Reset();

    bool                Command(const CommandEvent& rCEvt);

    bool                HasAnchor() const;
    void                SetAnchor( bool bAnchor );

    void                SetUpdateInterval( sal_uLong nInterval );

    // is switched on in the Ctor
    void                ExpandSelectionOnMouseMove( bool bExpand = true )
                        {
                            if( bExpand )
                                nFlags |= SelectionEngineFlags::EXPANDONMOVE;
                            else
                                nFlags &= ~SelectionEngineFlags::EXPANDONMOVE;
                        }
};

inline bool SelectionEngine::IsAddMode()  const
{
    if ( nFlags & (SelectionEngineFlags::IN_ADD | SelectionEngineFlags::ADD_ALW) )
        return true;
    else
        return false;
}

inline void SelectionEngine::SetAddMode( bool bNewMode )
{
    if ( bNewMode )
        nFlags |= SelectionEngineFlags::IN_ADD;
    else
        nFlags &= ~SelectionEngineFlags::IN_ADD;
}

inline void SelectionEngine::EnableDrag( bool bOn )
{
    if ( bOn )
        nFlags |= SelectionEngineFlags::DRG_ENAB;
    else
        nFlags &= ~SelectionEngineFlags::DRG_ENAB;
}

inline void SelectionEngine::AddAlways( bool bOn )
{
    if( bOn )
        nFlags |= SelectionEngineFlags::ADD_ALW;
    else
        nFlags &= ~SelectionEngineFlags::ADD_ALW;
}

inline bool SelectionEngine::IsAlwaysAdding() const
{
    if ( nFlags & SelectionEngineFlags::ADD_ALW )
        return true;
    else
        return false;
}

inline bool SelectionEngine::IsInSelection() const
{
    if ( nFlags & SelectionEngineFlags::IN_SEL )
        return true;
    else
        return false;
}

inline bool SelectionEngine::HasAnchor() const
{
    if ( nFlags & SelectionEngineFlags::HAS_ANCH )
        return true;
    else
        return false;
}

inline void SelectionEngine::SetAnchor( bool bAnchor )
{
    if ( bAnchor )
        nFlags |= SelectionEngineFlags::HAS_ANCH;
    else
        nFlags &= ~SelectionEngineFlags::HAS_ANCH;
}

#endif // INCLUDED_VCL_SELENG_HXX

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */