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Diffstat (limited to 'kolourpaint/tools/kptoolpreviewdialog.cpp')
| -rw-r--r-- | kolourpaint/tools/kptoolpreviewdialog.cpp | 431 |
1 files changed, 431 insertions, 0 deletions
diff --git a/kolourpaint/tools/kptoolpreviewdialog.cpp b/kolourpaint/tools/kptoolpreviewdialog.cpp new file mode 100644 index 00000000..23149232 --- /dev/null +++ b/kolourpaint/tools/kptoolpreviewdialog.cpp @@ -0,0 +1,431 @@ + +/* + 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 <qapplication.h> +#include <qlayout.h> +#include <qgroupbox.h> +#include <qlabel.h> +#include <qpushbutton.h> + +#include <kdebug.h> +#include <klocale.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 QString &caption, + const QString &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) +{ + QWidget *baseWidget = new QWidget (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 QGridLayout (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 QGroupBox (i18n ("Dimensions"), mainWidget ()); + + QLabel *originalLabel = new QLabel (i18n ("Original:"), m_dimensionsGroupBox); + QString originalDimensions; + if (document ()) + { + originalDimensions = i18n ("%1 x %2") + .arg (m_oldWidth) + .arg (m_oldHeight); + + // Stop the Dimensions Group Box from resizing so often + const QString minimumLengthString ("100000 x 100000"); + const int padLength = minimumLengthString.length (); + for (int i = originalDimensions.length (); i < padLength; i++) + originalDimensions += " "; + } + QLabel *originalDimensionsLabel = new QLabel (originalDimensions, m_dimensionsGroupBox); + + QLabel *afterTransformLabel = new QLabel (m_afterActionText, m_dimensionsGroupBox); + m_afterTransformDimensionsLabel = new QLabel (m_dimensionsGroupBox); + + + QGridLayout *dimensionsLayout = new QGridLayout (m_dimensionsGroupBox, + 2, 2, + marginHint () * 2, spacingHint ()); + + dimensionsLayout->addWidget (originalLabel, 0, 0, Qt::AlignBottom); + dimensionsLayout->addWidget (originalDimensionsLabel, 0, 1, Qt::AlignBottom); + dimensionsLayout->addWidget (afterTransformLabel, 1, 0, Qt::AlignTop); + dimensionsLayout->addWidget (m_afterTransformDimensionsLabel, 1, 1, Qt::AlignTop); +} + +// private +void kpToolPreviewDialog::createPreviewGroupBox () +{ + m_previewGroupBox = new QGroupBox (i18n ("Preview"), mainWidget ()); + + m_previewPixmapLabel = new kpResizeSignallingLabel (m_previewGroupBox); + m_previewPixmapLabel->setMinimumSize (150, 110); + connect (m_previewPixmapLabel, SIGNAL (resized ()), + this, SLOT (updatePreview ())); + + QPushButton *updatePushButton = new QPushButton (i18n ("&Update"), + m_previewGroupBox); + connect (updatePushButton, SIGNAL (clicked ()), + this, SLOT (slotUpdateWithWaitCursor ())); + + + QVBoxLayout *previewLayout = new QVBoxLayout (m_previewGroupBox, + marginHint () * 2, + QMAX (1, spacingHint () / 2)); + + previewLayout->addWidget (m_previewPixmapLabel, 1/*stretch*/); + previewLayout->addWidget (updatePushButton, 0/*stretch*/, Qt::AlignHCenter); +} + + +// protected +kpDocument *kpToolPreviewDialog::document () const +{ + return m_mainWindow ? m_mainWindow->document () : 0; +} + + +// protected +void kpToolPreviewDialog::addCustomWidgetToFront (QWidget *w) +{ + m_gridLayout->addMultiCellWidget (w, 0, 0, 0, 1); +} + +// protected +void kpToolPreviewDialog::addCustomWidget (QWidget *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; + + QSize newDim = newDimensions (); +#if DEBUG_KP_TOOL_PREVIEW_DIALOG + kdDebug () << "kpToolPreviewDialog::updateDimensions(): newDim=" << newDim << endl; +#endif + + QString 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 QMIN (widthScale, heightScale); +} + +// public static +int kpToolPreviewDialog::scaleDimension (int dimension, double scale, int min, int max) +{ + return QMAX (min, + QMIN (max, + qRound (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); + + QPixmap 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 ()) + { + QSize 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 QImage; so could cache the + // QImage so that transformPixmap() is faster + QPixmap transformedShrunkenDocumentPixmap = + transformPixmap (m_shrunkenDocumentPixmap, targetWidth, targetHeight); + + QPixmap 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 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> |