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/*
* Copyright (C) 2012 - Canonical Ltd.
*
* This program 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 2.1 or 3.0
* of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranties of
* MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the applicable version of the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of both the GNU Lesser General Public
* License along with this program. If not, see <http://www.gnu.org/licenses/>
*
* Authored by: Daniel d'Andrada <daniel.dandrada@canonical.com>
*/
#include <Nux/Nux.h>
#include <Nux/Layout.h>
#include "KineticScrollView.h"
using namespace nux;
NUX_IMPLEMENT_OBJECT_TYPE(KineticScrollView);
KineticScrollView::KineticScrollView(NUX_FILE_LINE_DECL)
: View(NUX_FILE_LINE_PARAM),
mouse_pressed_on_child_(false),
last_child_mouse_position_x_(0),
last_child_mouse_position_y_(0)
{
mouse_down.connect(sigc::mem_fun(this, &KineticScrollView::OnMouseDown));
mouse_up.connect(sigc::mem_fun(this, &KineticScrollView::OnMouseUp));
mouse_drag.connect(sigc::mem_fun(this, &KineticScrollView::OnMouseDrag));
scroller_.content_position_changed.connect(
sigc::mem_fun(this, &KineticScrollView::SetLayoutTranslation));
SetTrackChildMouseEvents(true);
SetBoundsBehavior(BoundsBehavior::DragAndOvershootBounds);
}
KineticScrollView::~KineticScrollView()
{
}
void KineticScrollView::SetBoundsBehavior(BoundsBehavior bounds_behavior)
{
scroller_.SetBoundsBehavior(bounds_behavior);
}
void KineticScrollView::SetScrollableDirections(ScrollableDirections scrollable_directions)
{
scroller_.SetScrollableDirections(scrollable_directions);
}
bool KineticScrollView::ChildMouseEvent(const Event& event)
{
bool want_mouse_ownership = false;
if (event.type == NUX_MOUSE_PRESSED || event.type == NUX_MOUSE_DOUBLECLICK)
{
mouse_pressed_on_child_ = true;
last_child_mouse_position_x_ = event.x;
last_child_mouse_position_y_ = event.y;
scroller_.ProcessFingerDown();
}
else if (event.type == NUX_MOUSE_MOVE)
{
int dx = event.x - last_child_mouse_position_x_;
int dy = event.y - last_child_mouse_position_y_;
scroller_.ProcessFingerDrag(dx, dy);
if (scroller_.GetHorizontalAxisState() ==
KineticScrollerAxisStateFollowingFinger
||
scroller_.GetVerticalAxisState() ==
KineticScrollerAxisStateFollowingFinger)
{
want_mouse_ownership = true;
}
}
else if (event.type == NUX_MOUSE_RELEASED)
{
mouse_pressed_on_child_ = false;
scroller_.ProcessFingerUp();
}
return want_mouse_ownership;
}
void KineticScrollView::Draw(GraphicsEngine & /* graphics_engine */,
bool /* force_draw */)
{
if (view_layout_)
{
view_layout_->QueueDraw();
}
}
void KineticScrollView::DrawContent(GraphicsEngine &graphics_engine, bool force_draw)
{
if (view_layout_)
view_layout_->ProcessDraw(graphics_engine, force_draw);
}
long KineticScrollView::PostLayoutManagement(long /* LayoutResult */)
{
if (view_layout_)
{
scroller_.SetContentSize(view_layout_->GetBaseWidth(),
view_layout_->GetBaseHeight());
}
scroller_.SetViewportSize(GetBaseWidth(), GetBaseHeight());
/* the return value is meaningless and not used for anything. */
return 0;
}
void KineticScrollView::PostResizeGeometry()
{
scroller_.SetViewportSize(GetBaseWidth(), GetBaseHeight());
}
void KineticScrollView::OnMouseDown(int /* x */, int /* y */,
unsigned long /* button_flags */,
unsigned long /* key_flags */)
{
scroller_.ProcessFingerDown();
}
void KineticScrollView::OnMouseUp(int /* x */, int /* y */,
unsigned long /* button_flags */,
unsigned long /* key_flags */)
{
scroller_.ProcessFingerUp();
}
void KineticScrollView::OnMouseDrag(int /* x */, int /* y */, int dx, int dy,
unsigned long /* button_flags */,
unsigned long /* key_flags */)
{
scroller_.ProcessFingerDrag(dx, dy);
}
void KineticScrollView::SetLayoutTranslation(int x, int y)
{
if (view_layout_)
{
view_layout_->Set2DTranslation(x, y, 0);
QueueDraw();
}
}
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