PlatformScrollBarGtk.cpp [plain text]
#include "config.h"
#include "PlatformScrollBar.h"
#include "IntRect.h"
#include "GraphicsContext.h"
#include "FrameView.h"
#include "NotImplemented.h"
#include "gtkdrawing.h"
#include <gtk/gtk.h>
using namespace WebCore;
static gboolean gtkScrollEventCallback(GtkWidget* widget, GdkEventScroll* event, PlatformScrollbar*)
{
return gtk_widget_event(gtk_widget_get_parent(widget), reinterpret_cast<GdkEvent*>(event));
}
PlatformScrollbar::PlatformScrollbar(ScrollbarClient* client, ScrollbarOrientation orientation,
ScrollbarControlSize controlSize)
: Scrollbar(client, orientation, controlSize)
, m_adjustment(GTK_ADJUSTMENT(gtk_adjustment_new(0.0, 0.0, 0.0, 0.0, 0.0, 0.0)))
{
GtkScrollbar* scrollBar = orientation == HorizontalScrollbar ?
GTK_SCROLLBAR(::gtk_hscrollbar_new(m_adjustment)) :
GTK_SCROLLBAR(::gtk_vscrollbar_new(m_adjustment));
gtk_widget_show(GTK_WIDGET(scrollBar));
g_object_ref(G_OBJECT(scrollBar));
g_signal_connect(G_OBJECT(scrollBar), "value-changed", G_CALLBACK(PlatformScrollbar::gtkValueChanged), this);
g_signal_connect(G_OBJECT(scrollBar), "scroll-event", G_CALLBACK(gtkScrollEventCallback), this);
setGtkWidget(GTK_WIDGET(scrollBar));
resize(PlatformScrollbar::horizontalScrollbarHeight(),
PlatformScrollbar::verticalScrollbarWidth());
}
PlatformScrollbar::~PlatformScrollbar()
{
g_signal_handlers_disconnect_by_func(G_OBJECT(gtkWidget()), (gpointer)PlatformScrollbar::gtkValueChanged, this);
g_signal_handlers_disconnect_by_func(G_OBJECT(gtkWidget()), (gpointer)gtkScrollEventCallback, this);
g_object_unref(G_OBJECT(gtkWidget()));
}
int PlatformScrollbar::width() const
{
return Widget::width();
}
int PlatformScrollbar::height() const
{
return Widget::height();
}
void PlatformScrollbar::setEnabled(bool enabled)
{
Widget::setEnabled(enabled);
}
void PlatformScrollbar::paint(GraphicsContext* graphicsContext, const IntRect& damageRect)
{
Widget::paint(graphicsContext, damageRect);
}
void PlatformScrollbar::updateThumbPosition()
{
if (m_adjustment->value != m_currentPos) {
m_adjustment->value = m_currentPos;
gtk_adjustment_value_changed(m_adjustment);
}
}
void PlatformScrollbar::updateThumbProportion()
{
m_adjustment->step_increment = m_lineStep;
m_adjustment->page_increment = m_pageStep;
m_adjustment->page_size = m_visibleSize;
m_adjustment->upper = m_totalSize;
gtk_adjustment_changed(m_adjustment);
}
void PlatformScrollbar::setRect(const IntRect& rect)
{
setFrameGeometry(rect);
geometryChanged();
}
void PlatformScrollbar::geometryChanged()
{
if (!parent())
return;
ASSERT(parent()->isFrameView());
FrameView* frameView = static_cast<FrameView*>(parent());
IntRect windowRect = IntRect(frameView->contentsToWindow(frameGeometry().location()), frameGeometry().size());
GtkAllocation allocation = { windowRect.x(), windowRect.y(), windowRect.width(), windowRect.height() };
gtk_widget_size_allocate(gtkWidget(), &allocation);
}
void PlatformScrollbar::gtkValueChanged(GtkAdjustment*, PlatformScrollbar* that)
{
that->setValue(static_cast<int>(gtk_adjustment_get_value(that->m_adjustment)));
}
static int scrollbarSize()
{
static int size = 0;
if (size)
return size;
MozGtkScrollbarMetrics metrics;
moz_gtk_get_scrollbar_metrics(&metrics);
size = metrics.slider_width;
return size;
}
int PlatformScrollbar::horizontalScrollbarHeight()
{
return scrollbarSize();
}
int PlatformScrollbar::verticalScrollbarWidth()
{
return scrollbarSize();
}