forked from openkylin/kolourpaint
605 lines
17 KiB
C++
605 lines
17 KiB
C++
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/*
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Copyright (c) 2003-2007 Clarence Dang <dang@kde.org>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define DEBUG_KP_COLOR_CELLS 0
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#include "widgets/kpColorCells.h"
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#include "imagelib/kpColor.h"
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#include "lgpl/generic/kpColorCollection.h"
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#include "widgets/kpDefaultColorCollection.h"
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#include "kpLogCategories.h"
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#include <KLocalizedString>
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#include <QColorDialog>
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#include <QContextMenuEvent>
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#include <QMouseEvent>
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#include <QScrollBar>
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//---------------------------------------------------------------------
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//
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// Table Geometry
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//
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// The number of columns that the table normally has.
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const int TableDefaultNumColumns = 11;
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const int TableDefaultWidth = ::TableDefaultNumColumns * 26;
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const int TableDefaultHeight = 52;
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static int TableNumColumns (const kpColorCollection &colorCol)
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{
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if (colorCol.count () == 0) {
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return 0;
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}
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return ::TableDefaultNumColumns;
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}
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static int TableNumRows (const kpColorCollection &colorCol)
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{
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const int cols = ::TableNumColumns (colorCol);
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if (cols == 0) {
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return 0;
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}
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return (colorCol.count () + (cols - 1)) / cols;
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}
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static int TableCellWidth (const kpColorCollection &colorCol)
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{
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Q_UNUSED (colorCol);
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return ::TableDefaultWidth / ::TableDefaultNumColumns;
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}
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static int TableCellHeight (const kpColorCollection &colorCol)
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{
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if (::TableNumRows (colorCol) <= 2) {
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return ::TableDefaultHeight / 2;
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}
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return ::TableDefaultHeight / 3;
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}
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//
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// kpColorCells
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//
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struct kpColorCellsPrivate
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{
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Qt::Orientation orientation{};
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// REFACTOR: This is data duplication with kpColorCellsBase::color[].
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// We've probably forgotten to synchronize them in some points.
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//
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// Calls to kpColorCellsBase::setColor() (which also come from
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// kpColorCellsBase itself) will automatically update both
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// kpColorCellsBase::d->color[] and the table cells. setColor() emits
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// colorChanged(), which is caught by our slotColorChanged(),
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// which synchronizes this color collection and updates the modified flag.
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//
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// Avoid calling our grandparent's, QTableWidget's, mutating methods as we
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// don't override enough of them, to fire signals that we can catch to update
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// this color collection.
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//
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// If you modify this color collection directly (e.g. in setColorCollection(),
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// openColorCollection(), appendRow(), deleteLastRow(), ...), you must work
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// the other way and call makeCellsMatchColorCollection() to synchronize
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// kpColorCellsBase::d->color[] and the table cells. You still need to update
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// the modified flag.
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kpColorCollection colorCol;
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QUrl url;
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bool isModified{};
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bool blockColorChangedSig{};
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};
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//---------------------------------------------------------------------
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kpColorCells::kpColorCells (QWidget *parent,
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Qt::Orientation o)
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: kpColorCellsBase (parent, 0/*rows for now*/, 0/*cols for now*/),
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d (new kpColorCellsPrivate ())
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{
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d->orientation = o;
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d->isModified = false;
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d->blockColorChangedSig = false;
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// When a text box is active, clicking to change the background color
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// should not move the keyboard focus away from the text box.
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setFocusPolicy (Qt::TabFocus);
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setShading (false); // no 3D look
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setAcceptDrops (true);
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setAcceptDrags (true);
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setCellsResizable (false);
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if (o == Qt::Horizontal)
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{
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// Reserve enough room for the default color collection's cells _and_
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// a vertical scrollbar, which only appears when it's required.
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// This ensures that if the vertical scrollbar appears, it does not obscure
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// any cells or require the addition of a horizontal scrollbar, which would
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// look ugly and take even more precious room.
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//
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// We do not dynamically reserve room based on the actual number of rows
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// of cells, as that would make our containing widgets too big.
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setMinimumSize (::TableDefaultWidth + frameWidth () * 2 +
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verticalScrollBar()->sizeHint().width(),
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::TableDefaultHeight + frameWidth () * 2);
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}
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else
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{
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Q_ASSERT (!"implemented");
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}
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setVerticalScrollBarPolicy (Qt::ScrollBarAsNeeded);
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// The default QTableWidget policy of QSizePolicy::Expanding forces our
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// containing widgets to get too big. Override it.
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setSizePolicy (QSizePolicy::Minimum, QSizePolicy::Minimum);
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connect (this, &kpColorCells::colorSelectedWhitButton,
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this, &kpColorCells::slotColorSelected);
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connect (this, &kpColorCells::colorDoubleClicked,
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this, &kpColorCells::slotColorDoubleClicked);
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connect (this, &kpColorCells::colorChanged,
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this, &kpColorCells::slotColorChanged);
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setColorCollection (DefaultColorCollection ());
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setWhatsThis (
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i18n (
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"<qt>"
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"<p>To select the foreground color that tools use to draw,"
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" left-click on a filled-in color cell."
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" To select the background color, right-click instead.</p>"
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"<p>To change the color of a color cell itself, double-click on it.</p>"
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"<p>You can also swap the color of a filled-in cell with any other"
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" cell using drag and drop."
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" Also, if you hold down the <b>Ctrl</b> key, the destination"
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" cell's color will be"
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" overwritten, instead of being swapped with the color of the source cell.</p>"
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"</qt>"));
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}
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//---------------------------------------------------------------------
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kpColorCells::~kpColorCells ()
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{
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delete d;
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}
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//---------------------------------------------------------------------
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// public static
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kpColorCollection kpColorCells::DefaultColorCollection ()
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{
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return kpDefaultColorCollection ();
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}
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//---------------------------------------------------------------------
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// public
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Qt::Orientation kpColorCells::orientation () const
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{
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return d->orientation;
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}
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//---------------------------------------------------------------------
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// public
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void kpColorCells::setOrientation (Qt::Orientation o)
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{
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d->orientation = o;
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makeCellsMatchColorCollection ();
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}
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//---------------------------------------------------------------------
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// protected
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// OPT: Find out why this is being called multiple times on startup.
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void kpColorCells::makeCellsMatchColorCollection ()
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{
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int c, r;
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if (orientation () == Qt::Horizontal)
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{
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c = ::TableNumColumns (d->colorCol);
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r = ::TableNumRows (d->colorCol);
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}
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else
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{
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c = ::TableNumRows (d->colorCol);
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r = ::TableNumColumns (d->colorCol);
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}
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#if DEBUG_KP_COLOR_CELLS
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qCDebug(kpLogWidgets) << "kpColorCells::makeCellsMatchColorCollection():"
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<< "r=" << r << "c=" << c;
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qCDebug(kpLogWidgets) << "verticalScrollBar=" << verticalScrollBar ()
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<< " sizeHint="
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<< (verticalScrollBar () ?
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verticalScrollBar ()->sizeHint () :
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QSize (-12, -34));
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#endif
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// Delete all cell widgets. This ensures that there will be no left-over
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// cell widgets, for the colors in the new color collection that are
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// actually invalid (which should not have cell widgets).
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clearContents ();
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setRowCount (r);
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setColumnCount (c);
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int CellWidth = ::TableCellWidth (d->colorCol),
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CellHeight = ::TableCellHeight (d->colorCol);
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// TODO: Take a screenshot of KolourPaint, magnify it and you'll find the
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// cells don't have exactly the sizes requested here. e.g. the
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// top row of cells is 1 pixel shorter than the bottom row. There
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// are probably other glitches.
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for (int y = 0; y < r; y++) {
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setRowHeight (y, CellHeight);
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}
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for (int x = 0; x < c; x++) {
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setColumnWidth (x, CellWidth);
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}
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const bool oldBlockColorChangedSig = d->blockColorChangedSig;
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d->blockColorChangedSig = true;
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// The last "(rowCount() * columnCount()) - d->colorCol.count()" cells
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// will be empty because we did not initialize them.
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for (int i = 0; i < d->colorCol.count (); i++)
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{
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int y, x;
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int pos;
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if (orientation () == Qt::Horizontal)
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{
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y = i / c;
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x = i % c;
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pos = i;
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}
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else
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{
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y = i % r;
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x = i / r;
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// int x = c - 1 - i / r;
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pos = y * c + x;
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}
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#if DEBUG_KP_COLOR_CELLS && 0
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qCDebug(kpLogWidgets) << "\tSetting cell " << i << ": y=" << y << " x=" << x
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<< " pos=" << pos;
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qCDebug(kpLogWidgets) << "\t\tcolor=" << (int *) d->colorCol.color (i).rgba()
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<< "isValid=" << d->colorCol.color (i).isValid ();
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#endif
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// (color may be invalid resulting in a hole in the middle of the table)
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setColor (pos, d->colorCol.color (i));
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//this->setToolTip( cellGeometry (y, x), colors [i].name ());
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}
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d->blockColorChangedSig = oldBlockColorChangedSig;
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}
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//---------------------------------------------------------------------
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bool kpColorCells::isModified () const
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{
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return d->isModified;
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}
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//---------------------------------------------------------------------
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void kpColorCells::setModified (bool yes)
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{
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#if DEBUG_KP_COLOR_CELLS
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qCDebug(kpLogWidgets) << "kpColorCells::setModified(" << yes << ")";
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#endif
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if (yes == d->isModified) {
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return;
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}
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d->isModified = yes;
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emit isModifiedChanged (yes);
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}
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//---------------------------------------------------------------------
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void kpColorCells::setModified ()
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{
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setModified (true);
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}
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//---------------------------------------------------------------------
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QUrl kpColorCells::url () const
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{
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return d->url;
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}
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//---------------------------------------------------------------------
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QString kpColorCells::name () const
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{
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return d->colorCol.name ();
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}
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//---------------------------------------------------------------------
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const kpColorCollection *kpColorCells::colorCollection () const
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{
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return &d->colorCol;
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}
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//---------------------------------------------------------------------
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void kpColorCells::ensureHaveAtLeastOneRow ()
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{
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if (d->colorCol.count () == 0) {
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d->colorCol.resize (::TableDefaultNumColumns);
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}
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}
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//---------------------------------------------------------------------
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void kpColorCells::setColorCollection (const kpColorCollection &colorCol, const QUrl &url)
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{
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d->colorCol = colorCol;
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ensureHaveAtLeastOneRow ();
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d->url = url;
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setModified (false);
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makeCellsMatchColorCollection ();
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emit rowCountChanged (rowCount ());
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emit urlChanged (d->url);
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emit nameChanged (name ());
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}
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//---------------------------------------------------------------------
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bool kpColorCells::openColorCollection (const QUrl &url)
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{
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// (this will pop up an error dialog on failure)
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if (d->colorCol.open (url, this))
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{
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ensureHaveAtLeastOneRow ();
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d->url = url;
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setModified (false);
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makeCellsMatchColorCollection ();
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emit rowCountChanged (rowCount ());
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emit urlChanged (d->url);
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emit nameChanged (name ());
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return true;
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}
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return false;
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}
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//---------------------------------------------------------------------
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bool kpColorCells::saveColorCollectionAs (const QUrl &url)
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{
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// (this will pop up an error dialog on failure)
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if (d->colorCol.saveAs (url, this))
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{
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d->url = url;
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setModified (false);
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emit urlChanged (d->url);
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return true;
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}
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return false;
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}
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//---------------------------------------------------------------------
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bool kpColorCells::saveColorCollection ()
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{
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// (this will pop up an error dialog on failure)
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if (d->colorCol.saveAs (d->url, this))
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{
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setModified (false);
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return true;
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}
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return false;
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}
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//---------------------------------------------------------------------
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void kpColorCells::appendRow ()
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{
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// This is the easiest implementation: change the color collection
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// and then synchronize the table cells. The other way is to call
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// setRowCount() and then, synchronize the color collection.
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const int targetNumCells = (rowCount () + 1) * ::TableDefaultNumColumns;
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d->colorCol.resize (targetNumCells);
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setModified (true);
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makeCellsMatchColorCollection ();
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emit rowCountChanged (rowCount ());
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}
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//---------------------------------------------------------------------
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void kpColorCells::deleteLastRow ()
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{
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// This is the easiest implementation: change the color collection
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// and then synchronize the table cells. The other way is to call
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// setRowCount() and then, synchronize the color collection.
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const int targetNumCells =
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qMax (0, (rowCount () - 1) * ::TableDefaultNumColumns);
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d->colorCol.resize (targetNumCells);
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// If there was only one row of colors to start with, the effect of this
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// line (after the above resize()) is to change that row to a row of
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// invalid colors.
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ensureHaveAtLeastOneRow ();
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setModified (true);
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makeCellsMatchColorCollection ();
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emit rowCountChanged (rowCount ());
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}
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//---------------------------------------------------------------------
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// protected virtual [base QWidget]
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void kpColorCells::contextMenuEvent (QContextMenuEvent *e)
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{
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// Eat right-mouse press to prevent it from getting to the toolbar.
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e->accept ();
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}
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//---------------------------------------------------------------------
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// protected slot
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void kpColorCells::slotColorSelected (int cell, const QColor &color,
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Qt::MouseButton button)
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{
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#if DEBUG_KP_COLOR_CELLS
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qCDebug(kpLogWidgets) << "kpColorCells::slotColorSelected(cell=" << cell
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<< ") mouseButton = " << button
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<< " rgb=" << (int *) color.rgba();
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#else
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Q_UNUSED (cell);
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#endif
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if (button == Qt::LeftButton)
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{
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emit foregroundColorChanged (kpColor (color.rgba()));
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}
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else if (button == Qt::RightButton)
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{
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emit backgroundColorChanged (kpColor (color.rgba()));
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}
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// REFACTOR: Make selectedness configurable inside kpColorCellsBase?
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//
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// Deselect the selected cell (selected by above kpColorCellsBase::mouseReleaseEvent()).
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// KolourPaint's palette has no concept of a current cell/color: you can
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// pick a color but you can't mark a cell as selected. In any case, a
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// selected cell would be rendered as violet, which would ruin the cell.
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//
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// setSelectionMode (kpColorCellsBase::NoSelection); does not work so we
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// clearSelection(). I think setSelectionMode() concerns when the user
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// directly selects a cell - not when kpColorCellsBase::mouseReleaseEvent()
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// selects a cell programmatically.
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clearSelection ();
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}
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//---------------------------------------------------------------------
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// protected slot
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void kpColorCells::slotColorDoubleClicked (int cell, const QColor &)
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{
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QColorDialog dialog(this);
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dialog.setCurrentColor(kpColorCellsBase::color(cell));
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dialog.setOptions(QColorDialog::ShowAlphaChannel);
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if ( dialog.exec() == QDialog::Accepted )
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setColor (cell, dialog.currentColor());
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}
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//---------------------------------------------------------------------
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// protected slot
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void kpColorCells::slotColorChanged (int cell, const QColor &color)
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{
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#if DEBUG_KP_COLOR_CELLS
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qCDebug(kpLogWidgets) << "cell=" << cell << "color=" << (const int *) color.rgba()
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<< "d->colorCol.count()=" << d->colorCol.count ();
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#endif
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if (d->blockColorChangedSig) {
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return;
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}
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// Cater for adding new colors to the end.
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if (cell >= d->colorCol.count ()) {
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d->colorCol.resize (cell + 1);
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}
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// TODO: We lose color names on a color swap (during drag-and-drop).
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const int ret = d->colorCol.changeColor (cell, color,
|
|
QString ()/*color name*/);
|
|
Q_ASSERT (ret == cell);
|
|
|
|
setModified (true);
|
|
}
|
|
|