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bugfix: window previews blink issue

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This commit is contained in:
Hualet Wang 2015-07-08 09:24:23 +08:00
parent 0b7e692409
commit 7d704b2d82
1 changed files with 5 additions and 1 deletions
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6
dde-dock/src/Widgets/windowpreview.cpp
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@ -1,6 +1,6 @@
#include <QApplication>
#include <QTimer>
#include <QtX11Extras/QX11Info>
#include <QX11Info>
#include <QDebug>
#include <X11/Xlib.h>
@ -57,10 +57,14 @@ void WindowPreview::onTimeout()
cairo_xlib_surface_set_size(m_surface, t_atts.width, t_atts.height);
// clear the target surface.
/* Clear the surface will cause the whole surface blink,
* maybe cairo takes advantage of xdamage and just updates
* the dirty part.
cairo_set_source_rgb(m_cairo, 1, 1, 1);
cairo_set_operator(m_cairo, CAIRO_OPERATOR_CLEAR);
cairo_paint(m_cairo);
cairo_set_operator(m_cairo, CAIRO_OPERATOR_OVER);
*/
// calculate the scale ratio
float ratio = 0.0f;