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/********************************************************************************
* *
* G r a d i e n t B a r W i d g e t *
* *
*********************************************************************************
* Copyright (C) 2002,2005 by Jeroen van der Zijp. All Rights Reserved. *
*********************************************************************************
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public *
* License as published by the Free Software Foundation; either *
* version 2.1 of the License, or (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. *
*********************************************************************************
* $Id: FXGradientBar.h 2127 2005-08-07 20:21:35Z lyle $ *
********************************************************************************/
#ifndef FXGRADIENTBAR_H
#define FXGRADIENTBAR_H
#ifndef FXFRAME_H
#include "FXFrame.h"
#endif
namespace FX {
/// Gradient bar orientation
enum {
GRADIENTBAR_HORIZONTAL = 0, /// Gradient bar shown horizontally
GRADIENTBAR_VERTICAL = 0x00008000, /// Gradient bar shown vertically
GRADIENTBAR_NO_CONTROLS = 0, /// No controls shown
GRADIENTBAR_CONTROLS_TOP = 0x00010000, /// Controls on top
GRADIENTBAR_CONTROLS_BOTTOM = 0x00020000, /// Controls on bottom
GRADIENTBAR_CONTROLS_LEFT = GRADIENTBAR_CONTROLS_TOP, /// Controls on left
GRADIENTBAR_CONTROLS_RIGHT = GRADIENTBAR_CONTROLS_BOTTOM /// Controls on right
};
/// Blend modes
enum {
GRADIENT_BLEND_LINEAR, /// Linear blend
GRADIENT_BLEND_POWER, /// Power law blend
GRADIENT_BLEND_SINE, /// Sine blend
GRADIENT_BLEND_INCREASING, /// Quadratic increasing blend
GRADIENT_BLEND_DECREASING /// Quadratic decreasing blend
};
// Gradient segment
struct FXGradient {
FXdouble lower; /// Lower value
FXdouble middle; /// Middle value
FXdouble upper; /// Upper value
FXColor lowerColor; /// Lower color
FXColor upperColor; /// Upper color
FXuchar blend; /// Blend method
};
class FXImage;
/**
* The gradient bar is a control that is used to edit color gradient,
* such as used in texture mapping and shape filling.
*/
class FXAPI FXGradientBar : public FXFrame {
FXDECLARE(FXGradientBar)
protected:
FXImage *bar; // Image containing colors
FXGradient *seg; // Segments
FXint nsegs; // Number of segments
FXint sellower; // Lower selected segment
FXint selupper; // Upper selected segment
FXint dropped; // Dropped segment
FXint current; // Current segment
FXint anchor; // Anchor segment
FXint grip; // Grip being dragged, if any
FXint where; // Where dropped in segment
FXString tip; // Tooltip value
FXString help; // Help value
FXColor selectColor; // Select color
FXint offset; // Offset
protected:
FXGradientBar();
void updatebar();
FXdouble getValue(FXint x,FXint y) const;
FXint getSegmentLowerPos(FXint sg) const;
FXint getSegmentUpperPos(FXint sg) const;
FXint getSegmentMiddlePos(FXint sg) const;
void drawUpArrow(FXDCWindow& dc,FXint x,FXint y,FXColor clr);
void drawDnArrow(FXDCWindow& dc,FXint x,FXint y,FXColor clr);
void drawRtArrow(FXDCWindow& dc,FXint x,FXint y,FXColor clr);
void drawLtArrow(FXDCWindow& dc,FXint x,FXint y,FXColor clr);
void drawBottomArrows(FXDCWindow& dc,FXint x,FXint y,FXint w,FXint h);
void drawTopArrows(FXDCWindow& dc,FXint x,FXint y,FXint w,FXint h);
void drawLeftArrows(FXDCWindow& dc,FXint x,FXint y,FXint w,FXint h);
void drawRightArrows(FXDCWindow& dc,FXint x,FXint y,FXint w,FXint h);
static FXdouble blendlinear(FXdouble middle,FXdouble pos);
static FXdouble blendpower(FXdouble middle,FXdouble pos);
static FXdouble blendsine(FXdouble middle,FXdouble pos);
static FXdouble blendincreasing(FXdouble middle,FXdouble pos);
static FXdouble blenddecreasing(FXdouble middle,FXdouble pos);
private:
FXGradientBar(const FXGradientBar&);
FXGradientBar &operator=(const FXGradientBar&);
public:
enum {
GRIP_NONE,
GRIP_LOWER,
GRIP_SEG_LOWER,
GRIP_MIDDLE,
GRIP_SEG_UPPER,
GRIP_UPPER
};
public:
long onPaint(FXObject*,FXSelector,void*);
long onLeftBtnPress(FXObject*,FXSelector,void*);
long onLeftBtnRelease(FXObject*,FXSelector,void*);
long onMotion(FXObject*,FXSelector,void*);
long onDNDEnter(FXObject*,FXSelector,void*);
long onDNDLeave(FXObject*,FXSelector,void*);
long onDNDMotion(FXObject*,FXSelector,void*);
long onDNDDrop(FXObject*,FXSelector,void*);
long onCmdBlending(FXObject*,FXSelector,void*);
long onUpdBlending(FXObject*,FXSelector,void*);
long onUpdSegColor(FXObject*,FXSelector,void*);
long onCmdSegColor(FXObject*,FXSelector,void*);
long onUpdRecenter(FXObject*,FXSelector,void*);
long onCmdRecenter(FXObject*,FXSelector,void*);
long onUpdSplit(FXObject*,FXSelector,void*);
long onCmdSplit(FXObject*,FXSelector,void*);
long onUpdMerge(FXObject*,FXSelector,void*);
long onCmdMerge(FXObject*,FXSelector,void*);
long onUpdUniform(FXObject*,FXSelector,void*);
long onCmdUniform(FXObject*,FXSelector,void*);
long onCmdSetHelp(FXObject*,FXSelector,void*);
long onCmdGetHelp(FXObject*,FXSelector,void*);
long onCmdSetTip(FXObject*,FXSelector,void*);
long onCmdGetTip(FXObject*,FXSelector,void*);
long onQueryHelp(FXObject*,FXSelector,void*);
long onQueryTip(FXObject*,FXSelector,void*);
public:
enum{
ID_LOWER_COLOR=FXFrame::ID_LAST,
ID_UPPER_COLOR,
ID_BLEND_LINEAR,
ID_BLEND_POWER,
ID_BLEND_SINE,
ID_BLEND_INCREASING,
ID_BLEND_DECREASING,
ID_RECENTER,
ID_SPLIT,
ID_MERGE,
ID_UNIFORM,
ID_LAST
};
public:
/// Construct a gradient bar
FXGradientBar(FXComposite* p,FXObject* tgt=NULL,FXSelector sel=0,FXuint opts=FRAME_NORMAL,FXint x=0,FXint y=0,FXint w=0,FXint h=0,FXint pl=DEFAULT_PAD,FXint pr=DEFAULT_PAD,FXint pt=DEFAULT_PAD,FXint pb=DEFAULT_PAD);
/// Create server-side resources
virtual void create();
/// Perform layout
virtual void layout();
/// Return default width
virtual FXint getDefaultWidth();
/// Return default height
virtual FXint getDefaultHeight();
/**
* Obtain segment containing location x, y.
* Returns -1 if no matching segment was found.
*/
FXint getSegment(FXint x,FXint y) const;
/**
* Get the grip in segment sg which is closest to location (x, y),
* one of GRIP_LOWER, GRIP_SEG_LOWER, GRIP_MIDDLE, GRIP_SEG_UPPER,
* GRIP_UPPER or GRIP_NONE.
*/
FXint getGrip(FXint sg,FXint x,FXint y) const;
/// Return the number of segments
FXint getNumSegments() const { return nsegs; }
/**
* Replace the current gradient segments.
* The gradient bar makes a copy of the input segments array.
*/
void setGradients(const FXGradient *segments,FXint nsegments);
/**
* Return a copy of the gradient segments.
* The array of segments is allocated using FXMALLOC and should be freed
* by the caller using FXFREE.
*/
void getGradients(FXGradient*& segments,FXint& nsegments) const;
/// Change current segment
void setCurrentSegment(FXint index,FXbool notify=FALSE);
/// Return current segment, or -1 if there is no current segment
FXint getCurrentSegment() const { return current; }
/// Change anchor segment
void setAnchorSegment(FXint index);
/// Return anchor segment, or -1 if there is no anchor segment
FXint getAnchorSegment() const { return anchor; }
/// Select segment(s)
FXbool selectSegments(FXint fm,FXint to,FXbool notify=FALSE);
/// Deselect all segments
FXbool deselectSegments(FXbool notify);
/// Returns TRUE if the specified segment is selected
FXbool isSegmentSelected(FXint s) const;
/// Set lower color of a segment
void setSegmentLowerColor(FXint s,FXColor clr,FXbool notify=FALSE);
/// Set upper color of a segment
void setSegmentUpperColor(FXint s,FXColor clr,FXbool notify=FALSE);
/// Get lower color of a segment
FXColor getSegmentLowerColor(FXint s) const;
/// Get upper color of a segment
FXColor getSegmentUpperColor(FXint s) const;
/// Move lower point of segment sg
void moveSegmentLower(FXint sg,FXdouble val,FXbool notify=FALSE);
/// Move middle point of segment sg
void moveSegmentMiddle(FXint sg,FXdouble val,FXbool notify=FALSE);
/// Move upper point of segment sg
void moveSegmentUpper(FXint sg,FXdouble val,FXbool notify=FALSE);
/// Move segments sglo to sghi to new position val
void moveSegments(FXint sglo,FXint sghi,FXdouble val,FXbool notify=FALSE);
/// Get lower value of segment sg
FXdouble getSegmentLower(FXint sg) const;
/// Get middle value of segment sg
FXdouble getSegmentMiddle(FXint sg) const;
/// Get upper value of segment sg
FXdouble getSegmentUpper(FXint sg) const;
/**
* Get gradient ramp.
* The ramp argument should be an array of size nramp, which will be
* filled with the appropriate color values.
*/
void gradient(FXColor *ramp,FXint nramp);
/**
* Get blend mode of segment, one of GRADIENT_BLEND_LINEAR,
* GRADIENT_BLEND_POWER, GRADIENT_BLEND_SINE, GRADIENT_BLEND_INCREASING,
* or GRADIENT_BLEND_DECREASING.
*/
FXuint getSegmentBlend(FXint s) const;
/// Split segment at the midpoint
void splitSegments(FXint sglo,FXint sghi,FXbool notify=FALSE);
/// Merge segments
void mergeSegments(FXint sglo,FXint sghi,FXbool notify=FALSE);
/// Make segments uniformly distributed
void uniformSegments(FXint sglo,FXint sghi,FXbool notify=FALSE);
/// Change blend mode of segment
void blendSegments(FXint sglo,FXint sghi,FXuint blend=GRADIENT_BLEND_LINEAR,FXbool notify=FALSE);
/// Get the gradient bar style
FXuint getBarStyle() const;
/// Change the gradient bar style
void setBarStyle(FXuint style);
/// Set color
void setSelectColor(FXColor clr);
/// Get color
FXColor getSelectColor() const { return selectColor; }
/// Set status line help text for this gradient bar
void setHelpText(const FXString& text){ help=text; }
/// Get status line help text for this gradient bar
const FXString& getHelpText() const { return help; }
/// Set tool tip message for this gradient bar
void setTipText(const FXString& text){ tip=text; }
/// Get tool tip message for this gradient bar
const FXString& getTipText() const { return tip; }
/// Save gradient bar to a stream
virtual void save(FXStream& store) const;
/// Load gradient bar from a stream
virtual void load(FXStream& store);
/// Destructor
virtual ~FXGradientBar();
};
}
#endif