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/***************************************************************************
paletteviewscrolledarea.h
-------------------
begin : Sun Jul 17 2000
copyright : (C) 2000 by Artur Rataj
email : art@zeus.polsl.gliwice.pl
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef PALETTEVIEWSCROLLEDAREA_H
#define PALETTEVIEWSCROLLEDAREA_H
#include <tqframe.h>
#include <tqevent.h>
#include "palette.h"
class KColorEditDoc;
class KColorEditView;
class TQScrollBar;
/** This widget draws the palette view scrolled area.
* It has paste and cut features.
* @author Artur Rataj
*/
class PaletteViewScrolledArea : public TQFrame {
Q_OBJECT
TQ_OBJECT
public:
/** Constructs the widget */
PaletteViewScrolledArea(const int defaultCellWidth, const int defaultCellHeight,
const int cellSpacing, TQScrollBar* scrollBar,
TQScrollBar* hScrollBar, KColorEditView* view,
TQWidget* tqparent = 0, const char* name = 0);
~PaletteViewScrolledArea();
/** Sets cells sizes and then calls repaintPalette() */
void redraw();
public slots:
/** Sets if the cursor follows a chosen color */
void slotCursorFollowsChosenColor(bool follows);
/** Sets whether to view color names */
void slotViewColorNames(bool viewColorNames);
protected:
/** The scrollbar widget */
TQScrollBar* scrollBar;
/** The horizontal scrollbar widget */
TQScrollBar* hScrollBar;
/** Pointer to the document view */
KColorEditView* view;
/** Default cell width */
int defaultCellWidth;
/** Default cell height */
int defaultCellHeight;
/** Cell spacing */
int cellSpacing;
/** Cell width */
int cellWidth;
/** Cell height */
int cellHeight;
/** The number of cells in a row */
int cellsInRow;
/** The number of rows */
int rowsNum;
/** A row width */
int rowWidth;
/** A row height */
int rowHeight;
/** Total height of cells table */
int cellTableHeight;
/** A position at which selection started */
int selectionBegin;
/** A position at which selection ended */
int selectionEnd;
/** Auto scroll timeout timer */
TQTimer* scrollTimeoutTimer;
/** Whether there is auto scroll timeout */
bool scrollTimeout;
/** Whether a mouse has been pressed over the palette and not yet released */
bool mousePressed;
/** Whether the cursor is being positioned */
bool cursorPositioning;
/** A color drag point */
TQPoint colorDragPoint;
/** Whether a color has been chosen and it is not dragged */
bool colorChosen;
/** Whether the cursor follows a chosen color */
bool cursorFollowsChosenColor;
/** Whether to view color names */
bool viewColorNames;
/** @return The viewed palette */
Palette* palette() const;
/** Computes the size of cell, number of cells in a row and
* height of cells table, depending on colors number and
* visible area width
*/
void setCellsSizes();
/** repaints the palette */
void repaintPalette();
/** @return A color index at a given position, -1 if none */
int colorIndex(const TQPoint& point) const;
/** @return A color at a given position */
TQColor color(const TQPoint& point) const;
/** sets a palette cursor position */
void setCursorPos(const int pos);
/** Sets a cursor position due to a mouse position.
* If not in cursor positioning, the cursor is set
* only if mouse points to a possible cursor location
* @return If the mouse points to a cursor location
*/
bool setCursorPos(const int x, const int y);
/** @return a palette cursor position */
int cursorPos() const;
/** sets a palette selection */
void setSelection(const int min, const int max);
/** @return a palette selection lesser position, or equal position
* if no colors are selected
*/
int selectionMin() const;
/** @return a palette selection greater position, or equal position
* if no colors are selected
*/
int selectionMax() const;
/** checks whether to scrolls the palette if a mouse position
* is outside it
*/
void checkSelectionAutoScroll(const int mousePosY);
/** The widget painting */
void paintEvent(TQPaintEvent* event);
/** Used to get mouse press events coordinates */
void mousePressEvent(TQMouseEvent* event);
/** Used to get mouse move events coordinates */
void mouseMoveEvent(TQMouseEvent* event);
/** Used to get mouse release events coordinates */
void mouseReleaseEvent(TQMouseEvent* event);
/** If there is a scroll timeout, scrolls palette,
* sets scrollTimeout to false and resets scroll timeout timer
*/
void scrollPalette(const int amount, const int timeout);
/** @return The viewed document */
KColorEditDoc* document() const;
/** Chooses a color to the color selector */
void chooseColor(Color* const color);
/** scrolls the scrolled area */
void scrollBy(const int y);
protected slots:
/** called if there is a scroll timeout, sets scrollTimeout to true */
void slotScrollTimeout();
};
#endif /* !defined( PALETTEVIEWSCROLLEDAREA_H ) */
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