1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/*
* Copyright (C) 2007 Holger Hans Peter Freyther zecke@selfish.org
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "ScrollbarGtk.h"
#include "IntRect.h"
#include "GraphicsContext.h"
#include "FrameView.h"
#include "NotImplemented.h"
#include "ScrollbarTheme.h"
#include "gtkdrawing.h"
#include <gtk/gtk.h>
using namespace WebCore;
PassRefPtr<Scrollbar> Scrollbar::createNativeScrollbar(ScrollbarClient* client, ScrollbarOrientation orientation, ScrollbarControlSize size)
{
return adoptRef(new ScrollbarGtk(client, orientation, size));
}
static gboolean gtkScrollEventCallback(GtkWidget* widget, GdkEventScroll* event, ScrollbarGtk*)
{
/* Scroll only if our parent rejects the scroll event. The rationale for
* this is that we want the main frame to scroll when we move the mouse
* wheel over a child scrollbar in most cases. */
return gtk_widget_event(gtk_widget_get_parent(widget), reinterpret_cast<GdkEvent*>(event));
}
ScrollbarGtk::ScrollbarGtk(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)))
{
GtkWidget* scrollBar = orientation == HorizontalScrollbar ?
gtk_hscrollbar_new(m_adjustment):
gtk_vscrollbar_new(m_adjustment);
gtk_widget_show(scrollBar);
g_signal_connect(scrollBar, "value-changed", G_CALLBACK(ScrollbarGtk::gtkValueChanged), this);
g_signal_connect(scrollBar, "scroll-event", G_CALLBACK(gtkScrollEventCallback), this);
setPlatformWidget(scrollBar);
/*
* assign a sane default width and height to the Scrollbar, otherwise
* we will end up with a 0 width scrollbar.
*/
resize(ScrollbarTheme::nativeTheme()->scrollbarThickness(),
ScrollbarTheme::nativeTheme()->scrollbarThickness());
}
IntPoint ScrollbarGtk::getLocationInParentWindow(const IntRect& rect)
{
IntPoint loc;
if (parent()->isScrollViewScrollbar(this))
loc = parent()->convertToContainingWindow(rect.location());
else
loc = parent()->contentsToWindow(rect.location());
return loc;
}
void ScrollbarGtk::frameRectsChanged()
{
if (!parent())
return;
IntPoint loc = getLocationInParentWindow(frameRect());
// Don't allow the allocation size to be negative
IntSize sz = frameRect().size();
sz.clampNegativeToZero();
GtkAllocation allocation = { loc.x(), loc.y(), sz.width(), sz.height() };
gtk_widget_size_allocate(platformWidget(), &allocation);
}
void ScrollbarGtk::updateThumbPosition()
{
if (m_adjustment->value != m_currentPos) {
m_adjustment->value = m_currentPos;
gtk_adjustment_value_changed(m_adjustment);
}
}
void ScrollbarGtk::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 ScrollbarGtk::setFrameRect(const IntRect& rect)
{
Widget::setFrameRect(rect);
frameRectsChanged();
}
void ScrollbarGtk::gtkValueChanged(GtkAdjustment*, ScrollbarGtk* that)
{
that->setValue(static_cast<int>(gtk_adjustment_get_value(that->m_adjustment)));
}
void ScrollbarGtk::setEnabled(bool shouldEnable)
{
if (enabled() == shouldEnable)
return;
Scrollbar::setEnabled(shouldEnable);
if (platformWidget())
gtk_widget_set_sensitive(platformWidget(), shouldEnable);
}
/*
* Strategy to painting a Widget:
* 1.) do not paint if there is no GtkWidget set
* 2.) We assume that GTK_NO_WINDOW is set and that frameRectsChanged positioned
* the widget correctly. ATM we do not honor the GraphicsContext translation.
*/
void ScrollbarGtk::paint(GraphicsContext* context, const IntRect& rect)
{
if (!platformWidget())
return;
if (!context->gdkExposeEvent())
return;
GtkWidget* widget = platformWidget();
ASSERT(GTK_WIDGET_NO_WINDOW(widget));
GdkEvent* event = gdk_event_new(GDK_EXPOSE);
event->expose = *context->gdkExposeEvent();
event->expose.area = static_cast<GdkRectangle>(rect);
IntPoint loc = getLocationInParentWindow(rect);
event->expose.area.x = loc.x();
event->expose.area.y = loc.y();
event->expose.region = gdk_region_rectangle(&event->expose.area);
/*
* This will be unref'ed by gdk_event_free.
*/
g_object_ref(event->expose.window);
/*
* If we are going to paint do the translation and GtkAllocation manipulation.
*/
if (!gdk_region_empty(event->expose.region))
gtk_widget_send_expose(widget, event);
gdk_event_free(event);
}
|
