src/kits/tracker/TitleView.h

   1 /*
   2 Open Tracker License
   3
   4 Terms and Conditions
   5
   6 Copyright (c) 1991-2000, Be Incorporated. All rights reserved.
   7
   8 Permission is hereby granted, free of charge, to any person obtaining a copy of
   9 this software and associated documentation files (the "Software"), to deal in
  10 the Software without restriction, including without limitation the rights to
  11 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
  12 of the Software, and to permit persons to whom the Software is furnished to do
  13 so, subject to the following conditions:
  14
  15 The above copyright notice and this permission notice applies to all licensees
  16 and shall be included in all copies or substantial portions of the Software.
  17
  18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF TITLE, MERCHANTABILITY,
  20 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21 BE INCORPORATED BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF, OR IN CONNECTION
  23 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24
  25 Except as contained in this notice, the name of Be Incorporated shall not be
  26 used in advertising or otherwise to promote the sale, use or other dealings in
  27 this Software without prior written authorization from Be Incorporated.
  28
  29 Tracker(TM), Be(R), BeOS(R), and BeIA(TM) are trademarks or registered trademarks
  30 of Be Incorporated in the United States and other countries. Other brand product
  31 names are registered trademarks or trademarks of their respective holders.
  32 All rights reserved.
  33 */
  34 #ifndef _TITLE_VIEW_H
  35 #define _TITLE_VIEW_H
  36
  37
  38 #include <Cursor.h>
  39 #include <DataIO.h>
  40 #include <ObjectList.h>
  41 #include <View.h>
  42
  43
  44 namespace BPrivate {
  45
  46
  47 class BPoseView;
  48 class BColumn;
  49 class BColumnTitle;
  50 class ColumnTrackState;
  51 class OffscreenBitmap;
  52
  53 const int32 kTitleViewHeight = 16;
  54 const int32 kEdgeSize = 6;
  55 const int32 kTitleColumnLeftExtraMargin = 11;
  56 const int32 kTitleColumnRightExtraMargin = 5;
  57 const int32 kTitleColumnExtraMargin = kTitleColumnLeftExtraMargin
  58         + kTitleColumnRightExtraMargin;
  59 const int32 kMinColumnWidth = 20;
  60 const int32 kRemoveTitleMargin = 10;
  61 const int32 kColumnStart = 40;
  62
  63
  64 class BTitleView : public BView {
  65 public:
  66         BTitleView(BPoseView*);
  67         virtual ~BTitleView();
  68
  69         virtual void MouseDown(BPoint where);
  70         virtual void MouseUp(BPoint where);
  71         virtual void Draw(BRect updateRect);
  72
  73         void Draw(BRect, bool useOffscreen = false,
  74                 bool updateOnly = true,
  75                 const BColumnTitle* pressedColumn = 0,
  76                 void (*trackRectBlitter)(BView*, BRect) = 0,
  77                 BRect passThru = BRect(0, 0, 0, 0));
  78
  79         void AddTitle(BColumn*, const BColumn* after = 0);
  80         void RemoveTitle(BColumn*);
  81         void Reset();
  82
  83         BPoseView* PoseView() const;
  84
  85 protected:
  86         void MouseMoved(BPoint, uint32, const BMessage*);
  87
  88 private:
  89         BColumnTitle* FindColumnTitle(BPoint) const;
  90         BColumnTitle* InColumnResizeArea(BPoint) const;
  91         BColumnTitle* FindColumnTitle(const BColumn*) const;
  92
  93         BPoseView* fPoseView;
  94         BObjectList<BColumnTitle> fTitleList;
  95         BCursor fHorizontalResizeCursor;
  96
  97         BColumnTitle* fPreviouslyClickedColumnTitle;
  98         bigtime_t fPreviousLeftClickTime;
  99         ColumnTrackState* fTrackingState;
 100
 101         static OffscreenBitmap* sOffscreen;
 102
 103         typedef BView _inherited;
 104
 105         friend class ColumnTrackState;
 106         friend class ColumnDragState;
 107 };
 108
 109
 110 class BColumnTitle {
 111 public:
 112         BColumnTitle(BTitleView*, BColumn*);
 113         virtual ~BColumnTitle() {}
 114
 115         virtual void Draw(BView*, bool pressed = false);
 116
 117         BColumn* Column() const;
 118         BRect Bounds() const;
 119
 120         bool InColumnResizeArea(BPoint) const;
 121
 122 private:
 123         BColumn* fColumn;
 124         BTitleView* fParent;
 125
 126         friend class ColumnResizeState;
 127 };
 128
 129
 130 // Utility classes to handle dragging state
 131 class ColumnTrackState {
 132 public:
 133         ColumnTrackState(BTitleView* titleView, BColumnTitle* columnTitle,
 134                 BPoint where, bigtime_t pastClickTime);
 135         virtual ~ColumnTrackState() {}
 136
 137         void MouseMoved(BPoint where, uint32 buttons);
 138         void MouseUp(BPoint where);
 139
 140 protected:
 141         virtual void Moved(BPoint where, uint32 buttons) = 0;
 142         virtual void Clicked(BPoint where) = 0;
 143         virtual void Done(BPoint where) = 0;
 144         virtual bool ValueChanged(BPoint where) = 0;
 145
 146         BTitleView*             fTitleView;
 147         BColumnTitle*   fTitle;
 148         BPoint                  fFirstClickPoint;
 149         bigtime_t               fPastClickTime;
 150         bool                    fHasMoved;
 151 };
 152
 153
 154 class ColumnResizeState : public ColumnTrackState {
 155 public:
 156         ColumnResizeState(BTitleView* titleView, BColumnTitle* columnTitle,
 157                 BPoint where, bigtime_t pastClickTime);
 158
 159 protected:
 160         virtual void Moved(BPoint where, uint32 buttons);
 161         virtual void Done(BPoint where);
 162         virtual void Clicked(BPoint where);
 163         virtual bool ValueChanged(BPoint);
 164
 165         void DrawLine();
 166         void UndrawLine();
 167
 168 private:
 169         float fLastLineDrawPos;
 170         float fInitialTrackOffset;
 171
 172         typedef ColumnTrackState _inherited;
 173 };
 174
 175
 176 class ColumnDragState : public ColumnTrackState {
 177 public:
 178         ColumnDragState(BTitleView* titleView, BColumnTitle* columnTitle,
 179                 BPoint where, bigtime_t pastClickTime);
 180
 181 protected:
 182         virtual void Moved(BPoint where, uint32 buttons);
 183         virtual void Done(BPoint where);
 184         virtual void Clicked(BPoint where);
 185         virtual bool ValueChanged(BPoint);
 186
 187         void DrawOutline(float);
 188         void UndrawOutline();
 189         void DrawPressNoOutline();
 190
 191 private:
 192         float fInitialMouseTrackOffset;
 193         bool fTrackingRemovedColumn;
 194         BMallocIO fColumnArchive;
 195
 196         typedef ColumnTrackState _inherited;
 197 };
 198
 199
 200 inline BColumn*
 201 BColumnTitle::Column() const
 202 {
 203         return fColumn;
 204 }
 205
 206
 207 inline BPoseView*
 208 BTitleView::PoseView() const
 209 {
 210         return fPoseView;
 211 }
 212
 213
 214 } // namespace BPrivate
 215
 216 using namespace BPrivate;
 217
 218
 219 #endif  // _TITLE_VIEW_H