kde/dolphin
kde/dolphin
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Do a delayed initialization of all widgets when showing the the Information Panel. This assures that no expensive initializations are done when the Information Panel is not shown at all.

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svn path=/trunk/KDE/kdebase/apps/; revision=817992
This commit is contained in:
Peter Penz 2008-06-07 11:00:42 +00:00
parent 232a542175
commit ff33284963
2 changed files with 92 additions and 62 deletions
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151
src/infosidebarpage.cpp
View file

@ -51,6 +51,7 @@
InfoSidebarPage::InfoSidebarPage(QWidget* parent) :
SidebarPage(parent),
m_initialized(false),
m_pendingPreview(false),
m_shownUrl(),
m_urlCandidate(),
@ -61,54 +62,6 @@ InfoSidebarPage::InfoSidebarPage(QWidget* parent) :
m_metaDataWidget(0),
m_metaTextLabel(0)
{
const int spacing = KDialog::spacingHint();
m_timer = new QTimer(this);
m_timer->setSingleShot(true);
connect(m_timer, SIGNAL(timeout()),
this, SLOT(slotTimeout()));
QVBoxLayout* layout = new QVBoxLayout;
layout->setSpacing(spacing);
// name
m_nameLabel = new QLabel(this);
QFont font = m_nameLabel->font();
font.setBold(true);
m_nameLabel->setFont(font);
m_nameLabel->setAlignment(Qt::AlignHCenter);
m_nameLabel->setWordWrap(true);
m_nameLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
// preview
m_preview = new PixmapViewer(this);
m_preview->setMinimumWidth(KIconLoader::SizeEnormous + KIconLoader::SizeMedium);
m_preview->setMinimumHeight(KIconLoader::SizeEnormous);
if (MetaDataWidget::metaDataAvailable()) {
// rating, comment and tags
m_metaDataWidget = new MetaDataWidget(this);
m_metaDataWidget->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
}
// general meta text information
m_metaTextLabel = new MetaTextLabel(this);
m_metaTextLabel->setMinimumWidth(spacing);
m_metaTextLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
layout->addWidget(m_nameLabel);
layout->addWidget(new KSeparator(this));
layout->addWidget(m_preview);
layout->addWidget(new KSeparator(this));
if (m_metaDataWidget != 0) {
layout->addWidget(m_metaDataWidget);
layout->addWidget(new KSeparator(this));
}
layout->addWidget(m_metaTextLabel);
// ensure that widgets in the information side bar are aligned towards the top
layout->addStretch(1);
setLayout(layout);
}
InfoSidebarPage::~InfoSidebarPage()
@ -126,14 +79,22 @@ void InfoSidebarPage::setUrl(const KUrl& url)
{
SidebarPage::setUrl(url);
if (url.isValid() && !m_shownUrl.equals(url, KUrl::CompareWithoutTrailingSlash)) {
cancelRequest();
m_shownUrl = url;
showItemInfo();
if (m_initialized) {
cancelRequest();
m_shownUrl = url;
showItemInfo();
} else {
m_shownUrl = url;
}
}
}
void InfoSidebarPage::setSelection(const KFileItemList& selection)
{
if (!m_initialized) {
return;
}
m_selection = selection;
const int count = selection.count();
@ -150,6 +111,10 @@ void InfoSidebarPage::setSelection(const KFileItemList& selection)
void InfoSidebarPage::requestDelayedItemInfo(const KFileItem& item)
{
if (!m_initialized) {
return;
}
cancelRequest();
m_fileItem = KFileItem();
@ -171,24 +136,32 @@ void InfoSidebarPage::showEvent(QShowEvent* event)
{
SidebarPage::showEvent(event);
if (!event->spontaneous()) {
if (!m_initialized) {
// do a delayed initialization so that no performance
// penalty is given when Dolphin is started with a closed
// Information Panel
init();
}
showItemInfo();
}
}
void InfoSidebarPage::resizeEvent(QResizeEvent* event)
{
// If the text inside the name label or the info label cannot
// get wrapped, then the maximum width of the label is increased
// so that the width of the information sidebar gets increased.
// To prevent this, the maximum width is adjusted to
// the current width of the sidebar.
const int maxWidth = event->size().width() - KDialog::spacingHint() * 4;
m_nameLabel->setMaximumWidth(maxWidth);
if (m_initialized) {
// If the text inside the name label or the info label cannot
// get wrapped, then the maximum width of the label is increased
// so that the width of the information sidebar gets increased.
// To prevent this, the maximum width is adjusted to
// the current width of the sidebar.
const int maxWidth = event->size().width() - KDialog::spacingHint() * 4;
m_nameLabel->setMaximumWidth(maxWidth);
// try to increase the preview as large as possible
m_preview->setSizeHint(QSize(maxWidth, maxWidth));
m_urlCandidate = m_shownUrl; // reset the URL candidate if a resizing is done
m_timer->start(TimerDelay);
// try to increase the preview as large as possible
m_preview->setSizeHint(QSize(maxWidth, maxWidth));
m_urlCandidate = m_shownUrl; // reset the URL candidate if a resizing is done
m_timer->start(TimerDelay);
}
SidebarPage::resizeEvent(event);
}
@ -403,4 +376,58 @@ bool InfoSidebarPage::convertMetaInfo(const QString& key, QString& text) const
return false;
}
void InfoSidebarPage::init()
{
const int spacing = KDialog::spacingHint();
m_timer = new QTimer(this);
m_timer->setSingleShot(true);
connect(m_timer, SIGNAL(timeout()),
this, SLOT(slotTimeout()));
QVBoxLayout* layout = new QVBoxLayout;
layout->setSpacing(spacing);
// name
m_nameLabel = new QLabel(this);
QFont font = m_nameLabel->font();
font.setBold(true);
m_nameLabel->setFont(font);
m_nameLabel->setAlignment(Qt::AlignHCenter);
m_nameLabel->setWordWrap(true);
m_nameLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
// preview
m_preview = new PixmapViewer(this);
m_preview->setMinimumWidth(KIconLoader::SizeEnormous + KIconLoader::SizeMedium);
m_preview->setMinimumHeight(KIconLoader::SizeEnormous);
if (MetaDataWidget::metaDataAvailable()) {
// rating, comment and tags
m_metaDataWidget = new MetaDataWidget(this);
m_metaDataWidget->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
}
// general meta text information
m_metaTextLabel = new MetaTextLabel(this);
m_metaTextLabel->setMinimumWidth(spacing);
m_metaTextLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
layout->addWidget(m_nameLabel);
layout->addWidget(new KSeparator(this));
layout->addWidget(m_preview);
layout->addWidget(new KSeparator(this));
if (m_metaDataWidget != 0) {
layout->addWidget(m_metaDataWidget);
layout->addWidget(new KSeparator(this));
}
layout->addWidget(m_metaTextLabel);
// ensure that widgets in the information side bar are aligned towards the top
layout->addStretch(1);
setLayout(layout);
m_initialized = true;
}
#include "infosidebarpage.moc"

3
src/infosidebarpage.h
View file

@ -132,7 +132,10 @@ private:
*/
bool convertMetaInfo(const QString& key, QString& text) const;
void init();
private:
bool m_initialized;
bool m_pendingPreview;
QTimer* m_timer;
KUrl m_shownUrl; // URL that is shown as info