diff options
| author | J-P Nurmi <jpnurmi@qt.io> | 2016-06-29 15:58:23 +0200 |
|---|---|---|
| committer | J-P Nurmi <jpnurmi@qt.io> | 2016-07-20 18:33:59 +0000 |
| commit | 4e6dd1c50a08877189891806ed0dc977aafceade (patch) | |
| tree | 69753811900e27ec3910cfce03a4e541cbee3038 /src/gui/kernel/qstylehints.cpp | |
| parent | 494ced13292fa9d7b572f5310090f6b8fab36e26 (diff) | |
Add QStyleHints::useHoverEffects
The delivery of hover events creates unnecessary overhead on touch
platforms. This allows Qt Quick Controls 2 to determine whether the
underlying platform wants hover effects. The hover effects are enabled
by default for the classic desktop platforms: Linux, Windows & macOS.
Change-Id: Ia4e7b5c0fcb7af8f1c47e06fb28086cffdf35976
Task-number: QTBUG-50003
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
Diffstat (limited to 'src/gui/kernel/qstylehints.cpp')
| -rw-r--r-- | src/gui/kernel/qstylehints.cpp | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/gui/kernel/qstylehints.cpp b/src/gui/kernel/qstylehints.cpp index ecc2886a04..7ccf1d86b0 100644 --- a/src/gui/kernel/qstylehints.cpp +++ b/src/gui/kernel/qstylehints.cpp @@ -77,6 +77,7 @@ public: , m_keyboardInputInterval(-1) , m_cursorFlashTime(-1) , m_tabFocusBehavior(-1) + , m_uiEffects(-1) {} int m_mouseDoubleClickInterval; @@ -86,6 +87,7 @@ public: int m_keyboardInputInterval; int m_cursorFlashTime; int m_tabFocusBehavior; + int m_uiEffects; }; /*! @@ -451,4 +453,34 @@ bool QStyleHints::singleClickActivation() const return themeableHint(QPlatformTheme::ItemViewActivateItemOnSingleClick, QPlatformIntegration::ItemViewActivateItemOnSingleClick).toBool(); } +/*! + \property QStyleHints::useHoverEffects + \brief \c true if UI elements should use hover effects. This is the + standard behavior on desktop platforms with a mouse pointer, whereas + on touch platforms the overhead of hover event delivery can be avoided. + + \since 5.8 +*/ +bool QStyleHints::useHoverEffects() const +{ + Q_D(const QStyleHints); + return (d->m_uiEffects >= 0 ? + d->m_uiEffects : + themeableHint(QPlatformTheme::UiEffects, QPlatformIntegration::UiEffects).toInt()) & QPlatformTheme::HoverEffect; +} + +void QStyleHints::setUseHoverEffects(bool useHoverEffects) +{ + Q_D(QStyleHints); + if (d->m_uiEffects >= 0 && useHoverEffects == bool(d->m_uiEffects & QPlatformTheme::HoverEffect)) + return; + if (d->m_uiEffects == -1) + d->m_uiEffects = 0; + if (useHoverEffects) + d->m_uiEffects |= QPlatformTheme::HoverEffect; + else + d->m_uiEffects &= ~QPlatformTheme::HoverEffect; + emit useHoverEffectsChanged(useHoverEffects); +} + QT_END_NAMESPACE |