1 /* 2 * Copyright (c) 2001-2008, Haiku, Inc. All rights reserved. 3 * Distributed under the terms of the MIT license. 4 * 5 * Authors: 6 * Marc Flerackers (mflerackers@androme.be) 7 * DarkWyrm (bpmagic@columbus.rr.com) 8 * Stefano Ceccherini (burton666@libero.it) 9 * Stephan Aßmus <superstippi@gmx.de> 10 */ 11 #ifndef _SCROLL_BAR_H 12 #define _SCROLL_BAR_H 13 14 15 #include <BeBuild.h> 16 #include <View.h> 17 18 19 #define B_V_SCROLL_BAR_WIDTH 14.0f 20 #define B_H_SCROLL_BAR_HEIGHT 14.0f 21 22 // TODO: shouldn't these be moved into the implementation? 23 #define SCROLL_BAR_MAXIMUM_KNOB_SIZE 50 24 #define SCROLL_BAR_MINIMUM_KNOB_SIZE 9 25 26 #define DISABLES_ON_WINDOW_DEACTIVATION 1 27 28 29 class BScrollBar : public BView { 30 public: 31 BScrollBar(BRect frame, const char* name, 32 BView* target, float min, float max, 33 orientation direction); 34 BScrollBar(const char* name, BView* target, 35 float min, float max, orientation direction); 36 BScrollBar(BMessage* data); 37 virtual ~BScrollBar(); 38 static BArchivable *Instantiate(BMessage* data); 39 virtual status_t Archive(BMessage *data, bool deep = true) const; 40 41 virtual void AttachedToWindow(); 42 void SetValue(float value); 43 float Value() const; 44 void SetProportion(float); 45 float Proportion() const; 46 virtual void ValueChanged(float newValue); 47 48 void SetRange(float min, float max); 49 void GetRange(float *min, float *max) const; 50 void SetSteps(float smallStep, float largeStep); 51 void GetSteps(float *smallStep, float *largeStep) const; 52 void SetTarget(BView *target); 53 void SetTarget(const char *targetName); 54 BView *Target() const; 55 orientation Orientation() const; 56 57 virtual void MessageReceived(BMessage *msg); 58 virtual void MouseDown(BPoint pt); 59 virtual void MouseUp(BPoint pt); 60 virtual void MouseMoved(BPoint pt, uint32 code, const BMessage *msg); 61 virtual void DetachedFromWindow(); 62 virtual void Draw(BRect updateRect); 63 virtual void FrameMoved(BPoint new_position); 64 virtual void FrameResized(float new_width, float new_height); 65 66 virtual BHandler *ResolveSpecifier(BMessage *msg, int32 index, 67 BMessage *specifier, int32 form, 68 const char *property); 69 70 virtual void ResizeToPreferred(); 71 virtual void GetPreferredSize(float *width, float *height); 72 virtual void MakeFocus(bool state = true); 73 virtual void AllAttached(); 74 virtual void AllDetached(); 75 virtual status_t GetSupportedSuites(BMessage *data); 76 77 virtual BSize MinSize(); 78 virtual BSize MaxSize(); 79 virtual BSize PreferredSize(); 80 81 virtual status_t Perform(perform_code d, void *arg); 82 83 #if DISABLES_ON_WINDOW_DEACTIVATION 84 virtual void WindowActivated(bool active); 85 #endif 86 87 private: 88 class Private; 89 friend class Private; 90 91 friend status_t control_scrollbar(scroll_bar_info *info, BScrollBar *bar); 92 // for use within the preflet 93 94 virtual void _ReservedScrollBar1(); 95 virtual void _ReservedScrollBar2(); 96 virtual void _ReservedScrollBar3(); 97 virtual void _ReservedScrollBar4(); 98 99 BScrollBar &operator=(const BScrollBar &); 100 101 bool _DoubleArrows() const; 102 void _UpdateThumbFrame(); 103 float _ValueFor(BPoint where) const; 104 int32 _ButtonFor(BPoint where) const; 105 BRect _ButtonRectFor(int32 button) const; 106 void _UpdateTargetValue(BPoint where); 107 void _UpdateArrowButtons(); 108 void _DrawDisabledBackground(BRect area, 109 const rgb_color& light, const rgb_color& dark, 110 const rgb_color& fill); 111 void _DrawArrowButton(int32 direction, 112 bool doubleArrows, BRect frame, 113 const BRect& updateRect, 114 bool enabled, bool down); 115 116 BSize _MinSize() const; 117 118 float fMin; 119 float fMax; 120 float fSmallStep; 121 float fLargeStep; 122 float fValue; 123 float fProportion; 124 BView* fTarget; 125 orientation fOrientation; 126 char* fTargetName; 127 128 Private* fPrivateData; 129 130 uint32 _reserved[3]; 131 }; 132 133 #endif // _SCROLL_BAR_H 134