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tdegraphics/kcoloredit/paletteviewscrolledarea.cpp

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/***************************************************************************
paletteviewscrolledarea.cpp
-------------------
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. *
* *
***************************************************************************/
#include <stdlib.h>
#include <tqptrlist.h>
#include <tqcolor.h>
#include <tqcursor.h>
#include <tqbrush.h>
#include <tqpainter.h>
#include <tqpixmap.h>
#include <tqpen.h>
#include <tqfontmetrics.h>
#include <tqtimer.h>
#include <kglobal.h>
#include <kcolordrag.h>
#include <tqscrollbar.h>
#include "palette.h"
#include "palettehistory.h"
#include "kcoloreditdoc.h"
#include "kcoloreditview.h"
#include "paletteviewscrolledarea.h"
#include "paletteviewscrolledarea.moc"
PaletteViewScrolledArea::PaletteViewScrolledArea(const int defaultCellWidth,
const int defaultCellHeight, const int cellSpacing, TQScrollBar* scrollBar,
TQScrollBar* hScrollBar, KColorEditView* view, TQWidget* tqparent, const char* name)
: TQFrame(tqparent, name) {
this->defaultCellWidth = defaultCellWidth;
this->defaultCellHeight = defaultCellHeight;
this->cellSpacing = cellSpacing;
this->scrollBar = scrollBar;
this->hScrollBar = hScrollBar;
this->view = view;
setBackgroundMode(NoBackground);
scrollTimeoutTimer = new TQTimer(this);
connect(scrollTimeoutTimer, TQT_SIGNAL( timeout() ), TQT_SLOT( slotScrollTimeout() ));
scrollTimeout = true;
mousePressed = false;
cursorPositioning = false;
colorChosen = false;
setCellsSizes();
slotCursorFollowsChosenColor(false);
this->scrollBar->setValue(0);
slotViewColorNames(false);
setMinimumSize(1, 1);
}
PaletteViewScrolledArea::~PaletteViewScrolledArea() {
}
void PaletteViewScrolledArea::slotCursorFollowsChosenColor(bool follows) {
cursorFollowsChosenColor = follows;
}
void PaletteViewScrolledArea::slotViewColorNames(bool viewColorNames) {
this->viewColorNames = viewColorNames;
}
void PaletteViewScrolledArea::redraw() {
//setCellsSizes();
repaintPalette();
}
void PaletteViewScrolledArea::repaintPalette() {
tqrepaint(false);
}
void PaletteViewScrolledArea::checkSelectionAutoScroll(const int mousePosY) {
if(mousePosY < 0)
scrollPalette(-8, 50);
else if(mousePosY > height() - 1)
scrollPalette(8, 50);
}
void PaletteViewScrolledArea::scrollPalette(const int amount, const int timeout) {
if(scrollTimeout) {
scrollBy(amount);
scrollTimeout = false;
scrollTimeoutTimer->start(timeout, true);
}
}
void PaletteViewScrolledArea::slotScrollTimeout() {
scrollTimeout = true;
if(mousePressed) {
TQPoint cursorPoint = mapFromGlobal(TQCursor::pos());
setCursorPos(cursorPoint.x(), cursorPoint.y());
selectionEnd = cursorPos();
if(selectionEnd >= selectionBegin)
setSelection(selectionBegin, selectionEnd);
else
setSelection(selectionEnd, selectionBegin);
checkSelectionAutoScroll(cursorPoint.y());
repaintPalette();
}
}
void PaletteViewScrolledArea::setCursorPos(const int pos) {
int oldCursorPos = document()->paletteCursorPos();
document()->setPaletteCursorPos(pos);
if(pos != oldCursorPos)
view->slotCursorPosChanged(pos);
}
bool PaletteViewScrolledArea::setCursorPos(const int x, const int y) {
int shiftedY = y + scrollBar->value();
int shiftedX = x + hScrollBar->value();
int cursorColumn = (shiftedX + rowWidth/cellsInRow/2)*cellsInRow/rowWidth;
int cursorRow;
if(shiftedY >= 0)
cursorRow = (shiftedY + cellSpacing)/rowHeight;
else
cursorRow = -1;
bool atCursorLocation = abs(cursorColumn*rowWidth/cellsInRow - shiftedX) < cellSpacing + 1;
if(!atCursorLocation) {
atCursorLocation = abs(cursorRow*rowHeight - shiftedY) < cellSpacing + 1;
if(atCursorLocation)
cursorColumn = 0;
}
if(atCursorLocation || cursorPositioning) {
if(cursorColumn > cellsInRow - 1) {
cursorColumn = 0;
++cursorRow;
}
int tmpCursorPos = cursorRow*cellsInRow + cursorColumn;
if(tmpCursorPos < 0)
tmpCursorPos = 0;
else if(tmpCursorPos >= palette()->length()) {
if(tmpCursorPos == palette()->length() &&
cursorColumn == 0 &&
selectionMin() == selectionMax())
/* if cursor has been set after the last color and the color is
* also the last in a row, and there is no selection, scroll the
* palette to ensure the cursor is visible
*/
scrollBy(rowHeight*2);
if(tmpCursorPos > palette()->length())
tmpCursorPos = palette()->length();
}
setCursorPos(tmpCursorPos);
}
return atCursorLocation;
}
void PaletteViewScrolledArea::setSelection(const int min, const int max) {
document()->setPaletteSelection(min, max);
}
void PaletteViewScrolledArea::setCellsSizes() {
rowWidth = width();
cellWidth = defaultCellWidth;
cellHeight = defaultCellHeight;
if(viewColorNames) {
TQPainter painter;
painter.begin(this);
if(cellHeight < painter.fontMetrics().height()) {
int prevCellHeight = cellHeight;
cellHeight = painter.fontMetrics().height();
cellWidth = cellHeight*cellWidth/prevCellHeight;
}
painter.end();
}
if(viewColorNames)
cellsInRow = 1;
else
cellsInRow = rowWidth/(cellWidth + cellSpacing*2);
if(viewColorNames)
rowHeight = cellHeight + cellSpacing*2;
else
rowHeight = (int)(rowWidth*1.0/cellsInRow/
( cellWidth + cellSpacing*2 )*( cellHeight + cellSpacing*2 ) + 0.5);
cellHeight = rowHeight - cellSpacing*2;
rowsNum = (palette()->length() + cellsInRow - 1)/cellsInRow;
cellTableHeight = rowsNum*rowHeight;
int contentsHeight;
if(palette()->length() != 0 &&
( palette()->length()%cellsInRow ) == 0)
contentsHeight = cellTableHeight + rowHeight;
else
contentsHeight = cellTableHeight;
int scrollBarRange = contentsHeight - 1 - height();
if(scrollBarRange < 0)
scrollBarRange = 0;
scrollBar->setRange(0, scrollBarRange);
scrollBar->setSteps(rowHeight, height());
}
Palette* PaletteViewScrolledArea::palette() const {
return document()->paletteHistory()->editableStream();
}
int PaletteViewScrolledArea::cursorPos() const {
return document()->paletteCursorPos();
}
int PaletteViewScrolledArea::selectionMin() const{
return document()->paletteSelectionBegin();
}
int PaletteViewScrolledArea::selectionMax() const {
return document()->paletteSelectionEnd();
}
void PaletteViewScrolledArea::paintEvent(TQPaintEvent* /*event*/) {
setCellsSizes();
TQPixmap pixmap(size());
TQPainter painter;
painter.tqbegin(TQT_TQPAINTDEVICE(&pixmap), this);
TQFontMetrics fontMetrics = painter.fontMetrics();
int maxLineWidth;
if(viewColorNames) {
int maxTextLength = 0;
for(int index = 0; index < palette()->length(); ++index) {
int currTextLength = fontMetrics.width(
palette()->color(index)->name());
if(currTextLength > maxTextLength)
maxTextLength = currTextLength;
}
maxLineWidth = cellWidth + cellSpacing*2 +
cellSpacing*3 + maxTextLength + 1;
} else
maxLineWidth = rowWidth;
int width = rowWidth;
if(maxLineWidth > width) {
hScrollBar->setRange(0, maxLineWidth - width);
hScrollBar->setSteps(8, width);
hScrollBar->show();
} else {
hScrollBar->setValue(0);
hScrollBar->hide();
}
int posY = scrollBar->value();
int firstRow = posY/rowHeight;
int lastRow = (posY + height() - 1 + rowHeight - 1)/rowHeight;
if(viewColorNames)
painter.fillRect(0, 0, rowWidth, height(),
TQBrush( TQFrame::tqpalette().active().base() ));
TQBrush normalBackgroundBrush(TQFrame::tqpalette().active().background());
TQBrush selectedBackgroundBrush(TQFrame::tqpalette().active().highlight());
TQBrush foregroundBrush;
TQBrush cursorBrush(TQFrame::tqpalette().active().foreground());
TQPen backgroundPen(TQFrame::tqpalette().active().foreground());
int min = selectionMin();
int max = selectionMax();
int fontAscent = fontMetrics.ascent();
int xBegin = -hScrollBar->value();
for(int x = 0; x < cellsInRow; ++x) {
int xEnd = -hScrollBar->value();
if(viewColorNames)
xEnd += cellWidth + cellSpacing*2;
else
xEnd += (x + 1)*(width - 1)/cellsInRow;
int cellWithSpacingWidth = xEnd - xBegin + 1;
int cellWidth = cellWithSpacingWidth - 2*cellSpacing;
for(int y = firstRow; y <= lastRow; ++y) {
int yBegin = y*rowHeight - posY;
int currCellNum = y*cellsInRow + x;
TQBrush* backgroundBrush;
if(currCellNum >= min && currCellNum < max)
backgroundBrush = &selectedBackgroundBrush;
else
backgroundBrush = &normalBackgroundBrush;
if(currCellNum < palette()->length()) {
Color* color = palette()->color(currCellNum);
TQBrush foregroundBrush(TQColor(
color->component(Color::RED_INDEX),
color->component(Color::GREEN_INDEX),
color->component(Color::BLUE_INDEX) ));
painter.fillRect(xBegin, yBegin, cellWithSpacingWidth, cellSpacing,
*backgroundBrush);
painter.fillRect(xBegin, yBegin + rowHeight - cellSpacing, cellWithSpacingWidth, cellSpacing,
*backgroundBrush);
TQBrush* backgroundOrCursorBrush;
if(cursorPos() == currCellNum)
backgroundOrCursorBrush = &cursorBrush;
else
backgroundOrCursorBrush = backgroundBrush;
painter.fillRect(xBegin, yBegin + cellSpacing, cellSpacing, cellHeight,
*backgroundOrCursorBrush);
painter.fillRect(xBegin + cellWithSpacingWidth - cellSpacing, yBegin + cellSpacing,
cellSpacing, cellHeight,
*backgroundBrush);
painter.fillRect(xBegin + cellSpacing, yBegin + cellSpacing, cellWidth, cellHeight,
foregroundBrush);
if(viewColorNames) {
painter.setPen(backgroundPen);
painter.drawText(xBegin + cellWithSpacingWidth + cellSpacing*3,
yBegin + rowHeight/2 + fontAscent/2, color->name());
}
} else {
if(cursorPos() == currCellNum) {
painter.fillRect(xBegin, yBegin + cellSpacing, cellSpacing, cellHeight,
cursorBrush);
painter.fillRect(xBegin, yBegin, cellSpacing, cellSpacing,
*backgroundBrush);
painter.fillRect(xBegin, yBegin + rowHeight - cellSpacing, cellSpacing, cellSpacing,
*backgroundBrush);
painter.fillRect(xBegin + cellSpacing, yBegin, cellWithSpacingWidth - cellSpacing, rowHeight,
*backgroundBrush);
} else
painter.fillRect(xBegin, yBegin, cellWithSpacingWidth, rowHeight,
*backgroundBrush);
}
}
xBegin = xEnd + 1;
}
painter.end();
painter.begin(this);
painter.drawPixmap(0, 0, pixmap);
painter.end();
}
int PaletteViewScrolledArea::colorIndex(const TQPoint& point) const {
int colorColumn = point.x()*cellsInRow/rowWidth;
int colorRow = (point.y() + scrollBar->value())/rowHeight;
int colorIndex = colorRow*cellsInRow + colorColumn;
if(colorIndex > palette()->length() - 1 ||
colorIndex < 0)
colorIndex = -1;
return colorIndex;
}
TQColor PaletteViewScrolledArea::color(const TQPoint& point) const {
Color* color = palette()->color(colorIndex( point ));
return TQColor(color->component( Color::RED_INDEX ),
color->component( Color::GREEN_INDEX ),
color->component( Color::BLUE_INDEX ));
}
void PaletteViewScrolledArea::mousePressEvent(TQMouseEvent* event) {
cursorPositioning = false;
if(( cursorPositioning = setCursorPos(event->x(), event->y()) )) {
selectionBegin = cursorPos();
setSelection(selectionBegin, selectionBegin);
redraw();
colorChosen = false;
} else {
colorDragPoint = event->pos();
colorChosen = true;
}
mousePressed = true;
}
void PaletteViewScrolledArea::mouseMoveEvent(TQMouseEvent* event) {
if(cursorPositioning) {
setCursorPos(event->x(), event->y());
selectionEnd = cursorPos();
if(selectionEnd >= selectionBegin)
setSelection(selectionBegin, selectionEnd);
else
setSelection(selectionEnd, selectionBegin);
checkSelectionAutoScroll(event->y());
redraw();
} else {
/* check if it is a color drag */
if(colorIndex( colorDragPoint ) != -1) {
if(abs( event->x() - colorDragPoint.x() ) > 2 ||
abs( event->y() - colorDragPoint.y() ) > 2) {
TQColor draggedColor = color(colorDragPoint);
KColorDrag* colorDrag = KColorDrag::makeDrag(draggedColor, this);
colorDrag->dragCopy();
} else
colorChosen = true;
}
}
}
void PaletteViewScrolledArea::mouseReleaseEvent(TQMouseEvent* /*event*/) {
if(colorChosen) {
if(colorIndex( colorDragPoint ) != -1) {
int index = colorIndex(colorDragPoint);
chooseColor(palette()->color( index ));
if(cursorFollowsChosenColor) {
setCursorPos(index);
setSelection(cursorPos(), cursorPos());
redraw();
}
}
colorChosen = false;
}
mousePressed = false;
}
void PaletteViewScrolledArea::chooseColor(Color* const color) {
view->chooseColor(color);
}
KColorEditDoc* PaletteViewScrolledArea::document() const {
return view->document();
}
void PaletteViewScrolledArea::scrollBy(const int y) {
scrollBar->setValue(scrollBar->value() + y);
}