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basket/src/kcolorcombo2.h

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/***************************************************************************
* Copyright (C) 2005 by S<EFBFBD>bastien Lao<EFBFBD>t *
* slaout@linux62.org *
* *
* 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. *
* *
* This program 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef KCOLORCOMBO2_H
#define KCOLORCOMBO2_H
#include <tqcombobox.h>
#include <tqcolor.h>
#include <tqpixmap.h>
class KColorPopup;
/**
* @short A combobox to display or allow user selection of a color in a user-friendly way.
*
* A combobox widget that popup an array of colors for the user to easily pick a common color.\n
* He/she can use the popup to quickly pick a reasonable color or open a color chooser dialog for a more precise choice.\n
* The user can also choose a default color (the standard background color, text color, etc... it's to the programmer to make sense of this property).\n
* \n
* The user is also offered some facilities: like KColorButton he/she can copy a color or paste it
* (with standard keyboard shortcuts, usually Ctrl+C and Ctrl+V), and he/she can drag or drop colors.
*
* @par Quick usage:
* Just create a new KColorCombo2() with the initial color and eventually an allowed default color
* (eg. TDEGlobalSettings::baseColor() for a background color, TDEGlobalSettings::textColor()...).\n
* You will be noticed of the color the user selects with the signal changed(), or you can use color() to get the color at any moment.\n
* Note that they can return an invalid color (see TQColor::isValid()) if the user chosen the default color (if he can choose that).\n
* It's then easy to save in settings, but if you want the real color (even for the default), you can get it with effectiveColor().
*
* @par Notes about default color:
* If you set a default color using TQt or TDE standard colors, the user can change them in the Trinity Control Center,
* but this widget willn't be update and will still show the old one.\n
* To be noticed of such color change and then update the widget with the new standard color, you can use one of those two methods:
* @code
* void TQWidgetDerivate::paletteChange(const TQPalette &oldPalette) { // TQWidgetDerivate is a parent or near custom widget
* theComboBox->setDefaultColor(theNewDefaultColor);
* TQWidget::paletteChange(oldPalette);
* }
* @endcode
* or connect the signal TDEApplication::tdedisplayPaletteChanged() to a slot that will set the default color of this widget.
*
* @par Advanced usage:
* By default, the combobox show a well balanced rainbow, OK for most usages, and you don't need to do anything for it to work.\n
* You however can set your own color array by calling newColorArray() with the number of columns and rows.
* Then, setColorAt() several times to fill the array.\n
* This allow the most flexibility. But if you just want a rainbow with more or less colors, setRainbowPreset() is what you want.\n
* If you worry about performance issues of creating a combobox with the default color array and then allocating another color array by yourself,
* note that the default color array is not allocated in the constructor, but as soon as it is demanded (on first popup if no array has been
* set before, or on first call of any accessors: colorAt(), columnCount(), setColorAt()...).
* Finally, colorRectPixmap() and drawColorRect() allow to draw the color rounded-rectangle in other places for a consistent look.
*
* @see TDEGlobalSettings Use one of the static functions to get TDE standard colors for default values.
* @see KColorButton The same, but without the rainbow popup or the choice of a default color.
* @see KColorDialog The dialog that is shown when the user click the "Other..." entry.
* @author S<EFBFBD>bastien Lao<EFBFBD>t <slaout@linux62.org>
*
* @image html commoncolorselector.png "Common Color Selector ComboBox"
*/
class KColorCombo2 : public TQComboBox
{
Q_OBJECT
TQ_PROPERTY(TQColor color READ color WRITE setColor)
TQ_PROPERTY(TQColor defaultColor READ defaultColor WRITE setDefaultColor)
public slots:
/**
* Change the selected color.\n
* If the popup is open, it will not reflect the change. FIXME: Should it?
* @param color The new selected color. Can be invalid to select the default one.\n
* If @p color is invalid and no default color is allowed, the function will keep the old one.
*/
void setColor(const TQColor &color);
/**
* Change the default color.
* @param color The color to return if the user choose the default one. If it is not valid, the user willn't be allowed to choose a default one.
* @see defaultColor() to get it.
*/
void setDefaultColor(const TQColor &color);
signals:
/**
* Emitted when the color of the widget is changed, either with setColor() or via user selection.
* @see color() to know the content of @p newColor.
*/
void changed(const TQColor &newColor);
public:
/**
* Constructs a color combobox with parent @p parent called @p name.
* @param color The initial selected color. If it is not valid, the default one will then be selected.\n
* But if @p color is invalid and there is no default color, the result is undefined.
* @param defaultColor The color to return if the user choose the default one. If it is not valid, the user willn't be allowed to choose a default one.
*/
KColorCombo2(const TQColor &color, const TQColor &defaultColor, TQWidget *parent = 0, const char *name = 0);
/**
* Constructs a color combobox with parent @p parent called @p name.\n
* The user is not allowed to choose a default color, unless you call setDefaultColor() later.
* @param color The initial selected color. If it is invalid, the result is undefined.
*/
KColorCombo2(const TQColor &color, TQWidget *parent = 0L, const char *name = 0L);
/**
* Destroys the combobox.
*/
virtual ~KColorCombo2();
/**
* Get the color chosen by the user.\n
* Can be invalid, if the user chosen the default one.\n
* Ideal to store it in settings for later recall.
* @see effectiveColor() if you want the color to be always valid.
*/
TQColor color() const;
/**
* Return the color chosen by the user.\n
* If the user chosen the default color, the default one is then returned, so the returned color is always valid.\n
* Ideal to directly use to draw.
* @see color() if you want to be notified of a default color choice.
*/
TQColor effectiveColor() const;
/**
* Returns the default color or an invalid color if no default color is set (if the user isn't allowed to choose a default color).
* @see setDefaultColor() to change it.
*/
TQColor defaultColor() const;
/**
* Allocate a new color array of the specified dimention.\n
* The new array will have invalid colors: you should then assign them one by one.\n
* If one or both of the dimentions are negative or null, this function do nothing (both dimentions are always ensured to be at least equal to 1).
* @param columnCount The number of columns of the array.
* @param rowCount The number of rows of the array.
* @see setColorAt() to set all colors once the array have been created.
*/
void newColorArray(int columnCount, int rowCount);
/**
* Get the number of columns in the array that the user can see to choose.
* @see rowCount() for the number of rows, and colorAt() to get a color from the array.
*/
int columnCount() const;
/**
* Get the number of rows in the array that the user can see to choose.
* @see columnCount() for the number of columns, and colorAt() to get a color from the array.
*/
int rowCount() const;
/**
* Set a color in the array at position (column,row).\n
* If one or both of the indexes are out of range, this function do nothing.\n
* @p column and @p row start from 0 to columnCount()-1 and columnRow()-1.
*
* @param column The x coordinate of the color to set or change.
* @param row The y coordinate of the color to set or change.
* @param color The color to assign at this position.
*/
void setColorAt(int column, int row, const TQColor &color);
/**
* Get a color in the array that the user can see to choose.\n
* @p column and @p row start from 0 to columnCount()-1 and columnRow()-1.
*
* @return The asked color, or an invalid color if the index is out of limit of the array.
* @see columnCount() and rowCount() to get the array dimentions.
*/
TQColor colorAt(int column, int row)/* const*/;
/**
* Fill the array of colors (that will be shown to the user in the popup that appears when he/she click the arrow) with a rainbow of different luminosity.\n
* This rainbow representation have the advantage of being natural and well structured for a human to be able to select reasonable colors.\n
* This function will allocate a color array by itself depending on the parameters (no need to call newColorArray()).
* @param colorColumnCount The number of columns. The 360 possible colors of the rainbow will be splitted to take the wanted number of colors, equaly separated.
* @param lightRowCount There is always at least 1 row of colors: the "pure" colors: pure red, pure blue, pure green, pure fushia...\n
* Additionnaly, you can add row on top: they will contain the same colors, but lighter.\n
* The parameter @p lightRowCount specify how many different lighting grades shoud be shown (from near to white, but not white, to "pure").
* @param darkRowCount Finally, on bottom of the row of "pure colors", you can put any variety of dark colors (from "pure", to near to black, but not black).\n
* So, the number of rows is equal to @p lightRowCount + 1 + @p darkRowCount. On top are light colors, gradually going to dark ones on bottom.
* @param withGray If true, another column (so there will be @p colorColumnCount+1 columns) is added on the very-right of the popup
* to show different gray values, matching the brightness of the sibling colors.
*
* The most acceptable parameters:
* @li The default values are good to have the 7 colors of the rainbow + colors between them, and light/dark colors are well distinct.
* @li If the color is a background color, you can set @p darkRowCount to 0, so only light colors are shown.
* @li The inverse is true for text color choice: you can set @p lightRowCount to 0.
* @li But be careful: some advanced users prefer white text on dark background, so you eg. can set @p lightRowCount to a big value and
* @p darkRowCount to a small one for a fewer choice of dark colors, but at least some ones.
*/
void setRainbowPreset(int colorColumnCount = 12, int lightRowCount = 4, int darkRowCount = 4, bool withGray = true);
//void setHsvPreset(TQColor hue[], TQColor saturation[], TQColor value[], bool withGray = true);
/**
* Returns a pixmap of a colored rounded-rectangle. The four corners are transparent.\n
* Useful if you want to set such a rectangle as an icon for a menu entry, or for drag and drop operation...
* @param color The color of the rectangle. If the color is invalid, a rainbow is then drawn (like for the "Other..." entry in the popup).
* @param isDefault True if @p color is the default one and should then be draw with a diagonal line.
* @param width The width of the rectangle pixmap to return.
* @param height The height of the rectangle pixmap to return.
*
* @see drawColorRect() if you need to draw it directly: it's faster.
*/
static TQPixmap colorRectPixmap(const TQColor &color, bool isDefault, int width, int height);
/**
* Draw an image of a colored rounded-rectangle.\n
* This is like colorRectPixmap() but significantly faster because there is nothing to copy, and no transparency mask to create and apply.
* @param painter The painter where to draw the image.
* @param x The x coordinate on the @p painter where to draw the rectangle.
* @param y The y coordinate on the @p painter where to draw the rectangle.
* @param color The color of the rectangle. If the color is invalid, a rainbow is then drawn (like for the "Other..." entry in the popup).
* @param isDefault True if @p color is the default one and should then be draw with a diagonal line.
* @param width The width of the rectangle pixmap to return.
* @param height The height of the rectangle pixmap to return.
*
* @see colorRectPixmap() to get a transparent pixmap of the rectangle.
*/
static void drawColorRect(TQPainter &painter, int x, int y, const TQColor &color, bool isDefault, int width, int height);
/**
* Get the height of a color rectangle for this combobox.\n
* This is equal to the text height, regarding to the current font of this combobox.
*/
int colorRectHeight() const;
/**
* Get the width of a color rectangle, depending of the @p height of it.\n
* It typically return 1.4 * @p height for decent rectangle proportions.
*/
int colorRectWidthForHeight(int height) const;
protected:
virtual void popup();
virtual void mousePressEvent(TQMouseEvent *event);
virtual void mouseMoveEvent(TQMouseEvent *event);
virtual bool eventFilter(TQObject *object, TQEvent *event);
virtual void dragEnterEvent(TQDragEnterEvent *event);
virtual void dropEvent(TQDropEvent *event);
virtual void keyPressEvent(TQKeyEvent *event);
virtual void fontChange(const TQFont &oldFont);
private:
/**
* Initialization routine common to every constructors.\n
* Constructors just have to initialize the TQComboBox, m_color and m_defaultColor
* and this function do the rest to complete the creation of this widget.
*/
void init();
/**
* Free up all memory allocated for the color array.\n
* But only if an array have previously been allocated, of course.
*/
void deleteColorArray();
/**
* Update the only item of the combobox to mirror the new selected color.\n
* Mainly called on init() and setColor().
*/
void updateComboBox();
KColorPopup *m_popup;
TQColor m_color;
TQColor m_defaultColor;
bool m_discardNextMousePress;
TQColor **m_colorArray;
int m_columnCount;
int m_rowCount;
TQPoint m_dragStartPos;
protected:
/**
* Keep place for future improvements without having to break binary compatibility.\n
* Does nothing for the moment.
*/
virtual void virtual_hook(int id, void *data);
private:
/**
* Keep place for future improvements without having to break binary compatibility.
*/
class KColorCombo2Private;
KColorCombo2Private *d;
};
// TODO: setColorArray(TQColor **, int, int) and use signals/slots ??
class KColorPopup : public TQWidget
{
Q_OBJECT
public:
KColorPopup(KColorCombo2 *parent);
~KColorPopup();
void relayout(); // updateGeometry() ??
protected:
void paintEvent(TQPaintEvent */*event*/);
void mouseMoveEvent(TQMouseEvent *event);
void mousePressEvent(TQMouseEvent *event);
void keyPressEvent(TQKeyEvent *event);
void doSelection();
void validate();
void updateCell(int column, int row);
friend class KColorCombo2;
private:
KColorCombo2 *m_selector;
TQPixmap m_pixmap;
int m_selectedRow;
int m_selectedColumn;
int m_columnOther;
TQColor m_otherColor;
static const int MARGIN;
static const int FRAME_WIDTH;
};
#endif // KCOLORCOMBO2_H