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tdegraphics/kolourpaint/tools/kptoolpreviewdialog.cpp

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/*
Copyright (c) 2003,2004,2005 Clarence Dang <dang@kde.org>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define DEBUG_KP_TOOL_PREVIEW_DIALOG 0
#include <kptoolpreviewdialog.h>
#include <tqapplication.h>
#include <tqlayout.h>
#include <tqgroupbox.h>
#include <tqlabel.h>
#include <tqpushbutton.h>
#include <kdebug.h>
#include <tdelocale.h>
#include <kpcolor.h>
#include <kpdocument.h>
#include <kpmainwindow.h>
#include <kppixmapfx.h>
#include <kpresizesignallinglabel.h>
#include <kpselection.h>
kpToolPreviewDialog::kpToolPreviewDialog (Features features,
bool reserveTopRow,
const TQString &caption,
const TQString &afterActionText,
bool actOnSelection,
kpMainWindow *parent,
const char *name)
: KDialogBase (parent, name, true/*modal*/,
caption,
KDialogBase::Ok | KDialogBase::Cancel),
m_afterActionText (afterActionText),
m_actOnSelection (actOnSelection),
m_mainWindow (parent),
m_dimensionsGroupBox (0),
m_afterTransformDimensionsLabel (0),
m_previewGroupBox (0),
m_previewPixmapLabel (0),
m_gridLayout (0)
{
TQWidget *baseWidget = new TQWidget (this);
setMainWidget (baseWidget);
if (document ())
{
m_oldWidth = document ()->width (actOnSelection);
m_oldHeight = document ()->height (actOnSelection);
}
else
{
m_oldWidth = m_oldHeight = 1;
}
if (features & Dimensions)
createDimensionsGroupBox ();
if (features & Preview)
createPreviewGroupBox ();
m_gridLayout = new TQGridLayout (baseWidget, 4, 2,
0/*margin*/, spacingHint ());
m_gridNumRows = reserveTopRow ? 1 : 0;
if (m_dimensionsGroupBox || m_previewGroupBox)
{
if (m_dimensionsGroupBox && m_previewGroupBox)
{
m_gridLayout->addWidget (m_dimensionsGroupBox, m_gridNumRows, 0);
m_gridLayout->addWidget (m_previewGroupBox, m_gridNumRows, 1);
m_gridLayout->setColStretch (1, 1);
}
else if (m_dimensionsGroupBox)
{
m_gridLayout->addMultiCellWidget (m_dimensionsGroupBox,
m_gridNumRows, m_gridNumRows, 0, 1);
}
else if (m_previewGroupBox)
{
m_gridLayout->addMultiCellWidget (m_previewGroupBox,
m_gridNumRows, m_gridNumRows, 0, 1);
}
m_gridLayout->setRowStretch (m_gridNumRows, 1);
m_gridNumRows++;;
}
}
kpToolPreviewDialog::~kpToolPreviewDialog ()
{
}
// private
void kpToolPreviewDialog::createDimensionsGroupBox ()
{
m_dimensionsGroupBox = new TQGroupBox (i18n ("Dimensions"), mainWidget ());
TQLabel *originalLabel = new TQLabel (i18n ("Original:"), m_dimensionsGroupBox);
TQString originalDimensions;
if (document ())
{
originalDimensions = i18n ("%1 x %2")
.arg (m_oldWidth)
.arg (m_oldHeight);
// Stop the Dimensions Group Box from resizing so often
const TQString minimumLengthString ("100000 x 100000");
const int padLength = minimumLengthString.length ();
for (int i = originalDimensions.length (); i < padLength; i++)
originalDimensions += " ";
}
TQLabel *originalDimensionsLabel = new TQLabel (originalDimensions, m_dimensionsGroupBox);
TQLabel *afterTransformLabel = new TQLabel (m_afterActionText, m_dimensionsGroupBox);
m_afterTransformDimensionsLabel = new TQLabel (m_dimensionsGroupBox);
TQGridLayout *dimensionsLayout = new TQGridLayout (m_dimensionsGroupBox,
2, 2,
marginHint () * 2, spacingHint ());
dimensionsLayout->addWidget (originalLabel, 0, 0, TQt::AlignBottom);
dimensionsLayout->addWidget (originalDimensionsLabel, 0, 1, TQt::AlignBottom);
dimensionsLayout->addWidget (afterTransformLabel, 1, 0, TQt::AlignTop);
dimensionsLayout->addWidget (m_afterTransformDimensionsLabel, 1, 1, TQt::AlignTop);
}
// private
void kpToolPreviewDialog::createPreviewGroupBox ()
{
m_previewGroupBox = new TQGroupBox (i18n ("Preview"), mainWidget ());
m_previewPixmapLabel = new kpResizeSignallingLabel (m_previewGroupBox);
m_previewPixmapLabel->setMinimumSize (150, 110);
connect (m_previewPixmapLabel, TQ_SIGNAL (resized ()),
this, TQ_SLOT (updatePreview ()));
TQPushButton *updatePushButton = new TQPushButton (i18n ("&Update"),
m_previewGroupBox);
connect (updatePushButton, TQ_SIGNAL (clicked ()),
this, TQ_SLOT (slotUpdateWithWaitCursor ()));
TQVBoxLayout *previewLayout = new TQVBoxLayout (m_previewGroupBox,
marginHint () * 2,
TQMAX (1, spacingHint () / 2));
previewLayout->addWidget (m_previewPixmapLabel, 1/*stretch*/);
previewLayout->addWidget (updatePushButton, 0/*stretch*/, TQt::AlignHCenter);
}
// protected
kpDocument *kpToolPreviewDialog::document () const
{
return m_mainWindow ? m_mainWindow->document () : 0;
}
// protected
void kpToolPreviewDialog::addCustomWidgetToFront (TQWidget *w)
{
m_gridLayout->addMultiCellWidget (w, 0, 0, 0, 1);
}
// protected
void kpToolPreviewDialog::addCustomWidget (TQWidget *w)
{
m_gridLayout->addMultiCellWidget (w, m_gridNumRows, m_gridNumRows, 0, 1);
m_gridNumRows++;
}
// private
void kpToolPreviewDialog::updateDimensions ()
{
if (!m_dimensionsGroupBox)
return;
kpDocument *doc = document ();
if (!doc)
return;
TQSize newDim = newDimensions ();
#if DEBUG_KP_TOOL_PREVIEW_DIALOG
kdDebug () << "kpToolPreviewDialog::updateDimensions(): newDim=" << newDim << endl;
#endif
TQString newDimString = i18n ("%1 x %2")
.arg (newDim.width ())
.arg (newDim.height ());
m_afterTransformDimensionsLabel->setText (newDimString);
}
// public static
double kpToolPreviewDialog::aspectScale (int newWidth, int newHeight,
int oldWidth, int oldHeight)
{
double widthScale = double (newWidth) / double (oldWidth);
double heightScale = double (newHeight) / double (oldHeight);
// Keeps aspect ratio
return TQMIN (widthScale, heightScale);
}
// public static
int kpToolPreviewDialog::scaleDimension (int dimension, double scale, int min, int max)
{
return TQMAX (min,
TQMIN (max,
tqRound (dimension * scale)));
}
// private
void kpToolPreviewDialog::updateShrukenDocumentPixmap ()
{
#if DEBUG_KP_TOOL_PREVIEW_DIALOG
kdDebug () << "kpToolPreviewDialog::updateShrukenDocumentPixmap()"
<< " shrunkenDocPixmap.size="
<< m_shrunkenDocumentPixmap.size ()
<< " previewPixmapLabelSizeWhenUpdatedPixmap="
<< m_previewPixmapLabelSizeWhenUpdatedPixmap
<< " previewPixmapLabel.size="
<< m_previewPixmapLabel->size ()
<< endl;
#endif
if (!m_previewGroupBox)
return;
kpDocument *doc = document ();
if (!doc || !doc->pixmap ())
{
kdError () << "kpToolPreviewDialog::updateShrunkenDocumentPixmap() doc="
<< doc << endl;
return;
}
if (m_shrunkenDocumentPixmap.isNull () ||
m_previewPixmapLabel->size () != m_previewPixmapLabelSizeWhenUpdatedPixmap)
{
#if DEBUG_KP_TOOL_PREVIEW_DIALOG
kdDebug () << "\tupdating shrunkenDocPixmap" << endl;
#endif
// TODO: Why the need to keep aspect ratio here?
// Isn't scaling the skewed result maintaining aspect enough?
double keepsAspectScale = aspectScale (m_previewPixmapLabel->width (),
m_previewPixmapLabel->height (),
m_oldWidth,
m_oldHeight);
TQPixmap pixmap;
if (m_actOnSelection)
{
kpSelection sel = *doc->selection ();
if (!sel.pixmap ())
sel.setPixmap (doc->getSelectedPixmap ());
pixmap = sel.transparentPixmap ();
}
else
{
pixmap = *doc->pixmap ();
}
m_shrunkenDocumentPixmap = kpPixmapFX::scale (
pixmap,
scaleDimension (m_oldWidth,
keepsAspectScale,
1, m_previewPixmapLabel->width ()),
scaleDimension (m_oldHeight,
keepsAspectScale,
1, m_previewPixmapLabel->height ()));
#if 0
m_shrunkenDocumentPixmap = kpPixmapFX::scale (
m_actOnSelection ? doc->getSelectedPixmap () : *doc->pixmap (),
m_previewPixmapLabel->width (),
m_previewPixmapLabel->height ());
#endif
m_previewPixmapLabelSizeWhenUpdatedPixmap = m_previewPixmapLabel->size ();
}
}
// private
void kpToolPreviewDialog::updatePreview ()
{
#if DEBUG_KP_TOOL_PREVIEW_DIALOG
kdDebug () << "kpToolPreviewDialog::updatePreview()" << endl;
#endif
if (!m_previewGroupBox)
return;
kpDocument *doc = document ();
if (!doc)
return;
updateShrukenDocumentPixmap ();
if (!m_shrunkenDocumentPixmap.isNull ())
{
TQSize newDim = newDimensions ();
double keepsAspectScale = aspectScale (m_previewPixmapLabel->width (),
m_previewPixmapLabel->height (),
newDim.width (),
newDim.height ());
int targetWidth = scaleDimension (newDim.width (),
keepsAspectScale,
1, // min
m_previewPixmapLabel->width ()); // max
int targetHeight = scaleDimension (newDim.height (),
keepsAspectScale,
1, // min
m_previewPixmapLabel->height ()); // max
// TODO: Some effects work directly on TQImage; so could cache the
// TQImage so that transformPixmap() is faster
TQPixmap transformedShrunkenDocumentPixmap =
transformPixmap (m_shrunkenDocumentPixmap, targetWidth, targetHeight);
TQPixmap previewPixmap (m_previewPixmapLabel->width (),
m_previewPixmapLabel->height ());
kpPixmapFX::fill (&previewPixmap, kpColor::transparent);
kpPixmapFX::setPixmapAt (&previewPixmap,
(previewPixmap.width () - transformedShrunkenDocumentPixmap.width ()) / 2,
(previewPixmap.height () - transformedShrunkenDocumentPixmap.height ()) / 2,
transformedShrunkenDocumentPixmap);
#if DEBUG_KP_TOOL_PREVIEW_DIALOG
kdDebug () << "kpToolPreviewDialog::updatePreview ():"
<< " shrunkenDocumentPixmap: w="
<< m_shrunkenDocumentPixmap.width ()
<< " h="
<< m_shrunkenDocumentPixmap.height ()
<< " previewPixmapLabel: w="
<< m_previewPixmapLabel->width ()
<< " h="
<< m_previewPixmapLabel->height ()
<< " transformedShrunkenDocumentPixmap: w="
<< transformedShrunkenDocumentPixmap.width ()
<< " h="
<< transformedShrunkenDocumentPixmap.height ()
<< " previewPixmap: w="
<< 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 TQLabel::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
TQApplication::setOverrideCursor (TQt::waitCursor);
slotUpdate ();
TQApplication::restoreOverrideCursor ();
}
#include <kptoolpreviewdialog.moc>