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432 lines
14 KiB
432 lines
14 KiB
15 years ago
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/*
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Copyright (c) 2003,2004,2005 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_TOOL_PREVIEW_DIALOG 0
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#include <kptoolpreviewdialog.h>
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#include <qapplication.h>
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#include <qlayout.h>
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#include <qgroupbox.h>
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#include <qlabel.h>
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#include <qpushbutton.h>
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#include <kdebug.h>
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#include <klocale.h>
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#include <kpcolor.h>
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#include <kpdocument.h>
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#include <kpmainwindow.h>
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#include <kppixmapfx.h>
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#include <kpresizesignallinglabel.h>
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#include <kpselection.h>
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kpToolPreviewDialog::kpToolPreviewDialog (Features features,
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bool reserveTopRow,
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const QString &caption,
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const QString &afterActionText,
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bool actOnSelection,
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kpMainWindow *parent,
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const char *name)
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: KDialogBase (parent, name, true/*modal*/,
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caption,
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KDialogBase::Ok | KDialogBase::Cancel),
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m_afterActionText (afterActionText),
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m_actOnSelection (actOnSelection),
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m_mainWindow (parent),
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m_dimensionsGroupBox (0),
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m_afterTransformDimensionsLabel (0),
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m_previewGroupBox (0),
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m_previewPixmapLabel (0),
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m_gridLayout (0)
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{
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QWidget *baseWidget = new QWidget (this);
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setMainWidget (baseWidget);
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if (document ())
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{
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m_oldWidth = document ()->width (actOnSelection);
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m_oldHeight = document ()->height (actOnSelection);
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}
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else
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{
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m_oldWidth = m_oldHeight = 1;
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}
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if (features & Dimensions)
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createDimensionsGroupBox ();
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if (features & Preview)
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createPreviewGroupBox ();
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m_gridLayout = new QGridLayout (baseWidget, 4, 2,
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0/*margin*/, spacingHint ());
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m_gridNumRows = reserveTopRow ? 1 : 0;
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if (m_dimensionsGroupBox || m_previewGroupBox)
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{
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if (m_dimensionsGroupBox && m_previewGroupBox)
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{
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m_gridLayout->addWidget (m_dimensionsGroupBox, m_gridNumRows, 0);
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m_gridLayout->addWidget (m_previewGroupBox, m_gridNumRows, 1);
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m_gridLayout->setColStretch (1, 1);
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}
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else if (m_dimensionsGroupBox)
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{
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m_gridLayout->addMultiCellWidget (m_dimensionsGroupBox,
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m_gridNumRows, m_gridNumRows, 0, 1);
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}
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else if (m_previewGroupBox)
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{
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m_gridLayout->addMultiCellWidget (m_previewGroupBox,
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m_gridNumRows, m_gridNumRows, 0, 1);
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}
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m_gridLayout->setRowStretch (m_gridNumRows, 1);
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m_gridNumRows++;;
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}
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}
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kpToolPreviewDialog::~kpToolPreviewDialog ()
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{
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}
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// private
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void kpToolPreviewDialog::createDimensionsGroupBox ()
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{
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m_dimensionsGroupBox = new QGroupBox (i18n ("Dimensions"), mainWidget ());
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QLabel *originalLabel = new QLabel (i18n ("Original:"), m_dimensionsGroupBox);
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QString originalDimensions;
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if (document ())
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{
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originalDimensions = i18n ("%1 x %2")
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.arg (m_oldWidth)
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.arg (m_oldHeight);
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// Stop the Dimensions Group Box from resizing so often
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const QString minimumLengthString ("100000 x 100000");
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const int padLength = minimumLengthString.length ();
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for (int i = originalDimensions.length (); i < padLength; i++)
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originalDimensions += " ";
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}
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QLabel *originalDimensionsLabel = new QLabel (originalDimensions, m_dimensionsGroupBox);
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QLabel *afterTransformLabel = new QLabel (m_afterActionText, m_dimensionsGroupBox);
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m_afterTransformDimensionsLabel = new QLabel (m_dimensionsGroupBox);
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QGridLayout *dimensionsLayout = new QGridLayout (m_dimensionsGroupBox,
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2, 2,
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marginHint () * 2, spacingHint ());
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dimensionsLayout->addWidget (originalLabel, 0, 0, Qt::AlignBottom);
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dimensionsLayout->addWidget (originalDimensionsLabel, 0, 1, Qt::AlignBottom);
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dimensionsLayout->addWidget (afterTransformLabel, 1, 0, Qt::AlignTop);
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dimensionsLayout->addWidget (m_afterTransformDimensionsLabel, 1, 1, Qt::AlignTop);
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}
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// private
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void kpToolPreviewDialog::createPreviewGroupBox ()
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{
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m_previewGroupBox = new QGroupBox (i18n ("Preview"), mainWidget ());
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m_previewPixmapLabel = new kpResizeSignallingLabel (m_previewGroupBox);
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m_previewPixmapLabel->setMinimumSize (150, 110);
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connect (m_previewPixmapLabel, SIGNAL (resized ()),
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this, SLOT (updatePreview ()));
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QPushButton *updatePushButton = new QPushButton (i18n ("&Update"),
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m_previewGroupBox);
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connect (updatePushButton, SIGNAL (clicked ()),
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this, SLOT (slotUpdateWithWaitCursor ()));
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QVBoxLayout *previewLayout = new QVBoxLayout (m_previewGroupBox,
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marginHint () * 2,
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QMAX (1, spacingHint () / 2));
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previewLayout->addWidget (m_previewPixmapLabel, 1/*stretch*/);
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previewLayout->addWidget (updatePushButton, 0/*stretch*/, Qt::AlignHCenter);
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}
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// protected
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kpDocument *kpToolPreviewDialog::document () const
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{
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return m_mainWindow ? m_mainWindow->document () : 0;
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}
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// protected
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void kpToolPreviewDialog::addCustomWidgetToFront (QWidget *w)
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{
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m_gridLayout->addMultiCellWidget (w, 0, 0, 0, 1);
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}
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// protected
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void kpToolPreviewDialog::addCustomWidget (QWidget *w)
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{
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m_gridLayout->addMultiCellWidget (w, m_gridNumRows, m_gridNumRows, 0, 1);
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m_gridNumRows++;
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}
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// private
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void kpToolPreviewDialog::updateDimensions ()
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{
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if (!m_dimensionsGroupBox)
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return;
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kpDocument *doc = document ();
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if (!doc)
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return;
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QSize newDim = newDimensions ();
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#if DEBUG_KP_TOOL_PREVIEW_DIALOG
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kdDebug () << "kpToolPreviewDialog::updateDimensions(): newDim=" << newDim << endl;
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#endif
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QString newDimString = i18n ("%1 x %2")
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.arg (newDim.width ())
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.arg (newDim.height ());
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m_afterTransformDimensionsLabel->setText (newDimString);
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}
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// public static
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double kpToolPreviewDialog::aspectScale (int newWidth, int newHeight,
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int oldWidth, int oldHeight)
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{
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double widthScale = double (newWidth) / double (oldWidth);
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double heightScale = double (newHeight) / double (oldHeight);
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// Keeps aspect ratio
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return QMIN (widthScale, heightScale);
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}
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// public static
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int kpToolPreviewDialog::scaleDimension (int dimension, double scale, int min, int max)
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{
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return QMAX (min,
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QMIN (max,
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qRound (dimension * scale)));
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}
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// private
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void kpToolPreviewDialog::updateShrukenDocumentPixmap ()
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{
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#if DEBUG_KP_TOOL_PREVIEW_DIALOG
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kdDebug () << "kpToolPreviewDialog::updateShrukenDocumentPixmap()"
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<< " shrunkenDocPixmap.size="
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<< m_shrunkenDocumentPixmap.size ()
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<< " previewPixmapLabelSizeWhenUpdatedPixmap="
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<< m_previewPixmapLabelSizeWhenUpdatedPixmap
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<< " previewPixmapLabel.size="
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<< m_previewPixmapLabel->size ()
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<< endl;
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#endif
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if (!m_previewGroupBox)
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return;
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kpDocument *doc = document ();
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if (!doc || !doc->pixmap ())
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{
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kdError () << "kpToolPreviewDialog::updateShrunkenDocumentPixmap() doc="
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<< doc << endl;
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return;
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}
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if (m_shrunkenDocumentPixmap.isNull () ||
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m_previewPixmapLabel->size () != m_previewPixmapLabelSizeWhenUpdatedPixmap)
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{
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#if DEBUG_KP_TOOL_PREVIEW_DIALOG
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kdDebug () << "\tupdating shrunkenDocPixmap" << endl;
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#endif
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// TODO: Why the need to keep aspect ratio here?
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// Isn't scaling the skewed result maintaining aspect enough?
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double keepsAspectScale = aspectScale (m_previewPixmapLabel->width (),
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m_previewPixmapLabel->height (),
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m_oldWidth,
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m_oldHeight);
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QPixmap pixmap;
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if (m_actOnSelection)
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{
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kpSelection sel = *doc->selection ();
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if (!sel.pixmap ())
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sel.setPixmap (doc->getSelectedPixmap ());
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pixmap = sel.transparentPixmap ();
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}
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else
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{
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pixmap = *doc->pixmap ();
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}
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m_shrunkenDocumentPixmap = kpPixmapFX::scale (
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pixmap,
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scaleDimension (m_oldWidth,
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keepsAspectScale,
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1, m_previewPixmapLabel->width ()),
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scaleDimension (m_oldHeight,
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keepsAspectScale,
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1, m_previewPixmapLabel->height ()));
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#if 0
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m_shrunkenDocumentPixmap = kpPixmapFX::scale (
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m_actOnSelection ? doc->getSelectedPixmap () : *doc->pixmap (),
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m_previewPixmapLabel->width (),
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m_previewPixmapLabel->height ());
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#endif
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m_previewPixmapLabelSizeWhenUpdatedPixmap = m_previewPixmapLabel->size ();
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}
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}
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// private
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void kpToolPreviewDialog::updatePreview ()
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{
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#if DEBUG_KP_TOOL_PREVIEW_DIALOG
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kdDebug () << "kpToolPreviewDialog::updatePreview()" << endl;
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#endif
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if (!m_previewGroupBox)
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return;
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kpDocument *doc = document ();
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if (!doc)
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return;
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updateShrukenDocumentPixmap ();
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if (!m_shrunkenDocumentPixmap.isNull ())
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{
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QSize newDim = newDimensions ();
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double keepsAspectScale = aspectScale (m_previewPixmapLabel->width (),
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m_previewPixmapLabel->height (),
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newDim.width (),
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newDim.height ());
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int targetWidth = scaleDimension (newDim.width (),
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keepsAspectScale,
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1, // min
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m_previewPixmapLabel->width ()); // max
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int targetHeight = scaleDimension (newDim.height (),
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keepsAspectScale,
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1, // min
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m_previewPixmapLabel->height ()); // max
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// TODO: Some effects work directly on QImage; so could cache the
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// QImage so that transformPixmap() is faster
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QPixmap transformedShrunkenDocumentPixmap =
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transformPixmap (m_shrunkenDocumentPixmap, targetWidth, targetHeight);
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QPixmap previewPixmap (m_previewPixmapLabel->width (),
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m_previewPixmapLabel->height ());
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kpPixmapFX::fill (&previewPixmap, kpColor::transparent);
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kpPixmapFX::setPixmapAt (&previewPixmap,
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(previewPixmap.width () - transformedShrunkenDocumentPixmap.width ()) / 2,
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(previewPixmap.height () - transformedShrunkenDocumentPixmap.height ()) / 2,
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transformedShrunkenDocumentPixmap);
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#if DEBUG_KP_TOOL_PREVIEW_DIALOG
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kdDebug () << "kpToolPreviewDialog::updatePreview ():"
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<< " shrunkenDocumentPixmap: w="
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<< m_shrunkenDocumentPixmap.width ()
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<< " h="
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<< m_shrunkenDocumentPixmap.height ()
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<< " previewPixmapLabel: w="
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<< m_previewPixmapLabel->width ()
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<< " h="
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<< m_previewPixmapLabel->height ()
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<< " transformedShrunkenDocumentPixmap: w="
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<< transformedShrunkenDocumentPixmap.width ()
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<< " h="
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<< transformedShrunkenDocumentPixmap.height ()
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<< " previewPixmap: w="
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||
|
|
<< previewPixmap.width ()
|
||
|
|
<< " h="
|
||
|
|
<< previewPixmap.height ()
|
||
|
|
<< endl;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
m_previewPixmapLabel->setPixmap (previewPixmap);
|
||
|
|
|
||
|
|
// immediate update esp. for expensive previews
|
||
|
|
m_previewPixmapLabel->repaint (false/*no erase*/);
|
||
|
|
|
||
|
|
#if DEBUG_KP_TOOL_PREVIEW_DIALOG
|
||
|
|
kdDebug () << "\tafter QLabel::setPixmap() previewPixmapLabel: w="
|
||
|
|
<< m_previewPixmapLabel->width ()
|
||
|
|
<< " h="
|
||
|
|
<< m_previewPixmapLabel->height ()
|
||
|
|
<< endl;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// protected slot virtual
|
||
|
|
void kpToolPreviewDialog::slotUpdate ()
|
||
|
|
{
|
||
|
|
#if DEBUG_KP_TOOL_PREVIEW_DIALOG
|
||
|
|
kdDebug () << "kpToolPreviewDialog::slotUpdate()" << endl;
|
||
|
|
#endif
|
||
|
|
updateDimensions ();
|
||
|
|
updatePreview ();
|
||
|
|
}
|
||
|
|
|
||
|
|
// protected slot virtual
|
||
|
|
void kpToolPreviewDialog::slotUpdateWithWaitCursor ()
|
||
|
|
{
|
||
|
|
#if DEBUG_KP_TOOL_PREVIEW_DIALOG
|
||
|
|
kdDebug () << "kpToolPreviewDialog::slotUpdateWithWaitCursor()"
|
||
|
|
<< endl;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
QApplication::setOverrideCursor (Qt::waitCursor);
|
||
|
|
|
||
|
|
slotUpdate ();
|
||
|
|
|
||
|
|
QApplication::restoreOverrideCursor ();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#include <kptoolpreviewdialog.moc>
|