haiku/headers/os/interface/ScrollBar.h

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/*
* Copyright (c) 2001-2005, Haiku, Inc.
* Distributed under the terms of the MIT license.
*
* Authors:
* Marc Flerackers (mflerackers@androme.be)
* DarkWyrm (bpmagic@columbus.rr.com)
* Stefano Ceccherini (burton666@libero.it)
* Stephan Aßmus <superstippi@gmx.de>
*/
#ifndef _SCROLL_BAR_H
#define _SCROLL_BAR_H
#include <BeBuild.h>
#include <View.h>
//----------------------------------------------------------------
//----- scroll bar defines ---------------------------------------
#define B_V_SCROLL_BAR_WIDTH 14.0
#define B_H_SCROLL_BAR_HEIGHT 14.0
#define SCROLL_BAR_MAXIMUM_KNOB_SIZE 50
#define SCROLL_BAR_MINIMUM_KNOB_SIZE 9
#define DISABLES_ON_WINDOW_DEACTIVATION 1
//----------------------------------------------------------------
//----- BScrollBar class -----------------------------------------
class BScrollBar : public BView {
public:
BScrollBar( BRect frame,
const char *name,
BView *target,
float min,
float max,
orientation direction);
BScrollBar(BMessage *data);
virtual ~BScrollBar();
static BArchivable *Instantiate(BMessage *data);
virtual status_t Archive(BMessage *data, bool deep = true) const;
virtual void AttachedToWindow();
void SetValue(float value);
float Value() const;
void SetProportion(float);
float Proportion() const;
virtual void ValueChanged(float newValue);
void SetRange(float min, float max);
void GetRange(float *min, float *max) const;
void SetSteps(float smallStep, float largeStep);
void GetSteps(float *smallStep, float *largeStep) const;
void SetTarget(BView *target);
void SetTarget(const char *targetName);
BView *Target() const;
orientation Orientation() const;
virtual void MessageReceived(BMessage *msg);
virtual void MouseDown(BPoint pt);
virtual void MouseUp(BPoint pt);
virtual void MouseMoved(BPoint pt, uint32 code, const BMessage *msg);
virtual void DetachedFromWindow();
virtual void Draw(BRect updateRect);
virtual void FrameMoved(BPoint new_position);
virtual void FrameResized(float new_width, float new_height);
virtual BHandler *ResolveSpecifier(BMessage *msg,
int32 index,
BMessage *specifier,
int32 form,
const char *property);
virtual void ResizeToPreferred();
virtual void GetPreferredSize(float *width, float *height);
virtual void MakeFocus(bool state = true);
virtual void AllAttached();
virtual void AllDetached();
virtual status_t GetSupportedSuites(BMessage *data);
//----- Private or reserved -----------------------------------------
virtual status_t Perform(perform_code d, void *arg);
#if DISABLES_ON_WINDOW_DEACTIVATION
virtual void WindowActivated(bool active);
#endif
private:
class Private;
friend class Private;
friend status_t control_scrollbar(scroll_bar_info *info, BScrollBar *bar); // for use within the preflet
virtual void _ReservedScrollBar1();
virtual void _ReservedScrollBar2();
virtual void _ReservedScrollBar3();
virtual void _ReservedScrollBar4();
BScrollBar &operator=(const BScrollBar &);
bool _DoubleArrows() const;
void _UpdateThumbFrame();
float _ValueFor(BPoint where) const;
int32 _ButtonFor(BPoint where) const;
BRect _ButtonRectFor(int32 button) const;
void _UpdateTargetValue(BPoint where);
void _UpdateArrowButtons();
void _DrawDisabledBackground(BRect area,
const rgb_color& light,
const rgb_color& dark,
const rgb_color& fill);
void _DrawArrowButton(int32 direction,
bool doubleArrows,
BRect frame,
const BRect& updateRect,
bool enabled, bool down);
float fMin;
float fMax;
float fSmallStep;
float fLargeStep;
float fValue;
float fProportion;
BView* fTarget;
orientation fOrientation;
char* fTargetName;
Private* fPrivateData;
uint32 _reserved[3];
};
//-------------------------------------------------------------
//-------------------------------------------------------------
#endif // _SCROLL_BAR_H