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410 lines
13 KiB
410 lines
13 KiB
/***************************************************************************
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paletteviewscrolledarea.cpp
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-------------------
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begin : Sun Jul 17 2000
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copyright : (C) 2000 by Artur Rataj
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email : art@zeus.polsl.gliwice.pl
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include <stdlib.h>
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#include <tqptrlist.h>
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#include <tqcolor.h>
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#include <tqcursor.h>
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#include <tqbrush.h>
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#include <tqpainter.h>
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#include <tqpixmap.h>
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#include <tqpen.h>
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#include <tqfontmetrics.h>
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#include <tqtimer.h>
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#include <kglobal.h>
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#include <kcolordrag.h>
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#include <tqscrollbar.h>
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#include "palette.h"
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#include "palettehistory.h"
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#include "kcoloreditdoc.h"
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#include "kcoloreditview.h"
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#include "paletteviewscrolledarea.h"
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#include "paletteviewscrolledarea.moc"
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PaletteViewScrolledArea::PaletteViewScrolledArea(const int defaultCellWidth,
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const int defaultCellHeight, const int cellSpacing, TQScrollBar* scrollBar,
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TQScrollBar* hScrollBar, KColorEditView* view, TQWidget* parent, const char* name)
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: TQFrame(parent, name) {
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this->defaultCellWidth = defaultCellWidth;
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this->defaultCellHeight = defaultCellHeight;
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this->cellSpacing = cellSpacing;
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this->scrollBar = scrollBar;
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this->hScrollBar = hScrollBar;
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this->view = view;
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setBackgroundMode(NoBackground);
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scrollTimeoutTimer = new TQTimer(this);
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connect(scrollTimeoutTimer, TQT_SIGNAL( timeout() ), TQT_SLOT( slotScrollTimeout() ));
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scrollTimeout = true;
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mousePressed = false;
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cursorPositioning = false;
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colorChosen = false;
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setCellsSizes();
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slotCursorFollowsChosenColor(false);
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this->scrollBar->setValue(0);
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slotViewColorNames(false);
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setMinimumSize(1, 1);
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}
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PaletteViewScrolledArea::~PaletteViewScrolledArea() {
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}
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void PaletteViewScrolledArea::slotCursorFollowsChosenColor(bool follows) {
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cursorFollowsChosenColor = follows;
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}
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void PaletteViewScrolledArea::slotViewColorNames(bool viewColorNames) {
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this->viewColorNames = viewColorNames;
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}
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void PaletteViewScrolledArea::redraw() {
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//setCellsSizes();
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repaintPalette();
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}
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void PaletteViewScrolledArea::repaintPalette() {
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repaint(false);
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}
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void PaletteViewScrolledArea::checkSelectionAutoScroll(const int mousePosY) {
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if(mousePosY < 0)
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scrollPalette(-8, 50);
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else if(mousePosY > height() - 1)
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scrollPalette(8, 50);
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}
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void PaletteViewScrolledArea::scrollPalette(const int amount, const int timeout) {
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if(scrollTimeout) {
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scrollBy(amount);
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scrollTimeout = false;
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scrollTimeoutTimer->start(timeout, true);
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}
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}
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void PaletteViewScrolledArea::slotScrollTimeout() {
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scrollTimeout = true;
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if(mousePressed) {
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TQPoint cursorPoint = mapFromGlobal(TQCursor::pos());
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setCursorPos(cursorPoint.x(), cursorPoint.y());
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selectionEnd = cursorPos();
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if(selectionEnd >= selectionBegin)
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setSelection(selectionBegin, selectionEnd);
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else
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setSelection(selectionEnd, selectionBegin);
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checkSelectionAutoScroll(cursorPoint.y());
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repaintPalette();
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}
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}
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void PaletteViewScrolledArea::setCursorPos(const int pos) {
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int oldCursorPos = document()->paletteCursorPos();
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document()->setPaletteCursorPos(pos);
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if(pos != oldCursorPos)
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view->slotCursorPosChanged(pos);
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}
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bool PaletteViewScrolledArea::setCursorPos(const int x, const int y) {
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int shiftedY = y + scrollBar->value();
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int shiftedX = x + hScrollBar->value();
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int cursorColumn = (shiftedX + rowWidth/cellsInRow/2)*cellsInRow/rowWidth;
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int cursorRow;
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if(shiftedY >= 0)
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cursorRow = (shiftedY + cellSpacing)/rowHeight;
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else
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cursorRow = -1;
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bool atCursorLocation = abs(cursorColumn*rowWidth/cellsInRow - shiftedX) < cellSpacing + 1;
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if(!atCursorLocation) {
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atCursorLocation = abs(cursorRow*rowHeight - shiftedY) < cellSpacing + 1;
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if(atCursorLocation)
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cursorColumn = 0;
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}
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if(atCursorLocation || cursorPositioning) {
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if(cursorColumn > cellsInRow - 1) {
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cursorColumn = 0;
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++cursorRow;
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}
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int tmpCursorPos = cursorRow*cellsInRow + cursorColumn;
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if(tmpCursorPos < 0)
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tmpCursorPos = 0;
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else if(tmpCursorPos >= palette()->length()) {
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if(tmpCursorPos == palette()->length() &&
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cursorColumn == 0 &&
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selectionMin() == selectionMax())
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/* if cursor has been set after the last color and the color is
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* also the last in a row, and there is no selection, scroll the
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* palette to ensure the cursor is visible
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*/
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scrollBy(rowHeight*2);
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if(tmpCursorPos > palette()->length())
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tmpCursorPos = palette()->length();
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}
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setCursorPos(tmpCursorPos);
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}
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return atCursorLocation;
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}
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void PaletteViewScrolledArea::setSelection(const int min, const int max) {
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document()->setPaletteSelection(min, max);
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}
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void PaletteViewScrolledArea::setCellsSizes() {
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rowWidth = width();
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cellWidth = defaultCellWidth;
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cellHeight = defaultCellHeight;
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if(viewColorNames) {
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TQPainter painter;
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painter.begin(this);
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if(cellHeight < painter.fontMetrics().height()) {
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int prevCellHeight = cellHeight;
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cellHeight = painter.fontMetrics().height();
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cellWidth = cellHeight*cellWidth/prevCellHeight;
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}
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painter.end();
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}
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if(viewColorNames)
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cellsInRow = 1;
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else
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cellsInRow = rowWidth/(cellWidth + cellSpacing*2);
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if(viewColorNames)
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rowHeight = cellHeight + cellSpacing*2;
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else
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rowHeight = (int)(rowWidth*1.0/cellsInRow/
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( cellWidth + cellSpacing*2 )*( cellHeight + cellSpacing*2 ) + 0.5);
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cellHeight = rowHeight - cellSpacing*2;
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rowsNum = (palette()->length() + cellsInRow - 1)/cellsInRow;
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cellTableHeight = rowsNum*rowHeight;
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int contentsHeight;
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if(palette()->length() != 0 &&
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( palette()->length()%cellsInRow ) == 0)
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contentsHeight = cellTableHeight + rowHeight;
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else
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contentsHeight = cellTableHeight;
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int scrollBarRange = contentsHeight - 1 - height();
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if(scrollBarRange < 0)
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scrollBarRange = 0;
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scrollBar->setRange(0, scrollBarRange);
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scrollBar->setSteps(rowHeight, height());
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}
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Palette* PaletteViewScrolledArea::palette() const {
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return document()->paletteHistory()->editableStream();
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}
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int PaletteViewScrolledArea::cursorPos() const {
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return document()->paletteCursorPos();
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}
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int PaletteViewScrolledArea::selectionMin() const{
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return document()->paletteSelectionBegin();
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}
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int PaletteViewScrolledArea::selectionMax() const {
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return document()->paletteSelectionEnd();
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}
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void PaletteViewScrolledArea::paintEvent(TQPaintEvent* /*event*/) {
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setCellsSizes();
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TQPixmap pixmap(size());
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TQPainter painter;
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painter.begin(TQT_TQPAINTDEVICE(&pixmap), this);
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TQFontMetrics fontMetrics = painter.fontMetrics();
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int maxLineWidth;
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if(viewColorNames) {
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int maxTextLength = 0;
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for(int index = 0; index < palette()->length(); ++index) {
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int currTextLength = fontMetrics.width(
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palette()->color(index)->name());
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if(currTextLength > maxTextLength)
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maxTextLength = currTextLength;
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}
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maxLineWidth = cellWidth + cellSpacing*2 +
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cellSpacing*3 + maxTextLength + 1;
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} else
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maxLineWidth = rowWidth;
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int width = rowWidth;
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if(maxLineWidth > width) {
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hScrollBar->setRange(0, maxLineWidth - width);
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hScrollBar->setSteps(8, width);
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hScrollBar->show();
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} else {
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hScrollBar->setValue(0);
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hScrollBar->hide();
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}
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int posY = scrollBar->value();
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int firstRow = posY/rowHeight;
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int lastRow = (posY + height() - 1 + rowHeight - 1)/rowHeight;
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if(viewColorNames)
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painter.fillRect(0, 0, rowWidth, height(),
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TQBrush( TQFrame::palette().active().base() ));
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TQBrush normalBackgroundBrush(TQFrame::palette().active().background());
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TQBrush selectedBackgroundBrush(TQFrame::palette().active().highlight());
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TQBrush foregroundBrush;
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TQBrush cursorBrush(TQFrame::palette().active().foreground());
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TQPen backgroundPen(TQFrame::palette().active().foreground());
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int min = selectionMin();
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int max = selectionMax();
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int fontAscent = fontMetrics.ascent();
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int xBegin = -hScrollBar->value();
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for(int x = 0; x < cellsInRow; ++x) {
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int xEnd = -hScrollBar->value();
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if(viewColorNames)
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xEnd += cellWidth + cellSpacing*2;
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else
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xEnd += (x + 1)*(width - 1)/cellsInRow;
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int cellWithSpacingWidth = xEnd - xBegin + 1;
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int cellWidth = cellWithSpacingWidth - 2*cellSpacing;
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for(int y = firstRow; y <= lastRow; ++y) {
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int yBegin = y*rowHeight - posY;
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int currCellNum = y*cellsInRow + x;
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TQBrush* backgroundBrush;
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if(currCellNum >= min && currCellNum < max)
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backgroundBrush = &selectedBackgroundBrush;
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else
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backgroundBrush = &normalBackgroundBrush;
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if(currCellNum < palette()->length()) {
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Color* color = palette()->color(currCellNum);
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TQBrush foregroundBrush(TQColor(
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color->component(Color::RED_INDEX),
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color->component(Color::GREEN_INDEX),
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color->component(Color::BLUE_INDEX) ));
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painter.fillRect(xBegin, yBegin, cellWithSpacingWidth, cellSpacing,
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*backgroundBrush);
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painter.fillRect(xBegin, yBegin + rowHeight - cellSpacing, cellWithSpacingWidth, cellSpacing,
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*backgroundBrush);
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TQBrush* backgroundOrCursorBrush;
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if(cursorPos() == currCellNum)
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backgroundOrCursorBrush = &cursorBrush;
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else
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backgroundOrCursorBrush = backgroundBrush;
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painter.fillRect(xBegin, yBegin + cellSpacing, cellSpacing, cellHeight,
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*backgroundOrCursorBrush);
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painter.fillRect(xBegin + cellWithSpacingWidth - cellSpacing, yBegin + cellSpacing,
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cellSpacing, cellHeight,
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*backgroundBrush);
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painter.fillRect(xBegin + cellSpacing, yBegin + cellSpacing, cellWidth, cellHeight,
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foregroundBrush);
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if(viewColorNames) {
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painter.setPen(backgroundPen);
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painter.drawText(xBegin + cellWithSpacingWidth + cellSpacing*3,
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yBegin + rowHeight/2 + fontAscent/2, color->name());
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}
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} else {
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if(cursorPos() == currCellNum) {
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painter.fillRect(xBegin, yBegin + cellSpacing, cellSpacing, cellHeight,
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cursorBrush);
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painter.fillRect(xBegin, yBegin, cellSpacing, cellSpacing,
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*backgroundBrush);
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painter.fillRect(xBegin, yBegin + rowHeight - cellSpacing, cellSpacing, cellSpacing,
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*backgroundBrush);
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painter.fillRect(xBegin + cellSpacing, yBegin, cellWithSpacingWidth - cellSpacing, rowHeight,
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*backgroundBrush);
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} else
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painter.fillRect(xBegin, yBegin, cellWithSpacingWidth, rowHeight,
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*backgroundBrush);
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}
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}
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xBegin = xEnd + 1;
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}
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painter.end();
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painter.begin(this);
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painter.drawPixmap(0, 0, pixmap);
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painter.end();
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}
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int PaletteViewScrolledArea::colorIndex(const TQPoint& point) const {
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int colorColumn = point.x()*cellsInRow/rowWidth;
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int colorRow = (point.y() + scrollBar->value())/rowHeight;
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int colorIndex = colorRow*cellsInRow + colorColumn;
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if(colorIndex > palette()->length() - 1 ||
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colorIndex < 0)
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colorIndex = -1;
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return colorIndex;
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}
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TQColor PaletteViewScrolledArea::color(const TQPoint& point) const {
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Color* color = palette()->color(colorIndex( point ));
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return TQColor(color->component( Color::RED_INDEX ),
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color->component( Color::GREEN_INDEX ),
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color->component( Color::BLUE_INDEX ));
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}
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void PaletteViewScrolledArea::mousePressEvent(TQMouseEvent* event) {
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cursorPositioning = false;
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if(( cursorPositioning = setCursorPos(event->x(), event->y()) )) {
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selectionBegin = cursorPos();
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setSelection(selectionBegin, selectionBegin);
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redraw();
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colorChosen = false;
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} else {
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colorDragPoint = event->pos();
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colorChosen = true;
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}
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mousePressed = true;
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}
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void PaletteViewScrolledArea::mouseMoveEvent(TQMouseEvent* event) {
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if(cursorPositioning) {
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setCursorPos(event->x(), event->y());
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selectionEnd = cursorPos();
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if(selectionEnd >= selectionBegin)
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setSelection(selectionBegin, selectionEnd);
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else
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setSelection(selectionEnd, selectionBegin);
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checkSelectionAutoScroll(event->y());
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redraw();
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} else {
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/* check if it is a color drag */
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if(colorIndex( colorDragPoint ) != -1) {
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if(abs( event->x() - colorDragPoint.x() ) > 2 ||
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abs( event->y() - colorDragPoint.y() ) > 2) {
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TQColor draggedColor = color(colorDragPoint);
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KColorDrag* colorDrag = KColorDrag::makeDrag(draggedColor, this);
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colorDrag->dragCopy();
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} else
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colorChosen = true;
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}
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}
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}
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void PaletteViewScrolledArea::mouseReleaseEvent(TQMouseEvent* /*event*/) {
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if(colorChosen) {
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if(colorIndex( colorDragPoint ) != -1) {
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int index = colorIndex(colorDragPoint);
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chooseColor(palette()->color( index ));
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if(cursorFollowsChosenColor) {
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setCursorPos(index);
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setSelection(cursorPos(), cursorPos());
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redraw();
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}
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}
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colorChosen = false;
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}
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mousePressed = false;
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}
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void PaletteViewScrolledArea::chooseColor(Color* const color) {
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view->chooseColor(color);
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}
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KColorEditDoc* PaletteViewScrolledArea::document() const {
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return view->document();
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}
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void PaletteViewScrolledArea::scrollBy(const int y) {
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scrollBar->setValue(scrollBar->value() + y);
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}
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