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/*
* This source file is part of libRocket, the HTML/CSS Interface Middleware
*
* For the latest information, see http://www.librocket.com
*
* Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
#include "precompiled.h"
#include "ElementHandle.h"
#include "../../Include/Rocket/Core/ElementDocument.h"
#include "../../Include/Rocket/Core/ElementUtilities.h"
#include "../../Include/Rocket/Core/Property.h"
#include "../../Include/Rocket/Core/Event.h"
namespace Rocket {
namespace Core {
ElementHandle::ElementHandle(const String& tag) : Element(tag), drag_start(0, 0)
{
// Make sure we can be dragged!
SetProperty(DRAG, DRAG);
move_target = NULL;
size_target = NULL;
initialised = false;
}
ElementHandle::~ElementHandle()
{
}
void ElementHandle::OnAttributeChange(const PropertyNameList& changed_attributes)
{
Element::OnAttributeChange(changed_attributes);
// Reset initialised state if the move or size targets have changed.
if (changed_attributes.find("move_target") != changed_attributes.end() ||
changed_attributes.find("size_target") != changed_attributes.end())
{
initialised = false;
move_target = NULL;
size_target = NULL;
}
}
void ElementHandle::ProcessEvent(Event& event)
{
Element::ProcessEvent(event);
if (event.GetTargetElement() == this)
{
// Lazy initialisation.
if (!initialised && GetOwnerDocument())
{
String move_target_name = GetAttribute<String>("move_target", "");
if (!move_target_name.Empty())
move_target = GetElementById(move_target_name);
String size_target_name = GetAttribute<String>("size_target", "");
if (!size_target_name.Empty())
size_target = GetElementById(size_target_name);
initialised = true;
}
if (event == DRAGSTART)
{
// Store the drag starting position
drag_start.x = event.GetParameter< int >("mouse_x", 0);
drag_start.y = event.GetParameter< int >("mouse_y", 0);
// Store current element position and size
if (move_target)
{
move_original_position.x = move_target->GetOffsetLeft();
move_original_position.y = move_target->GetOffsetTop();
}
if (size_target)
size_original_size = size_target->GetBox().GetSize(Box::CONTENT);
}
else if (event == DRAG)
{
// Work out the delta
int x = event.GetParameter< int >("mouse_x", 0) - drag_start.x;
int y = event.GetParameter< int >("mouse_y", 0) - drag_start.y;
// Update the move and size objects
if (move_target)
{
move_target->SetProperty(LEFT, Property(Math::RealToInteger(move_original_position.x + x), Property::PX));
move_target->SetProperty(TOP, Property(Math::RealToInteger(move_original_position.y + y), Property::PX));
}
if (size_target)
{
const Property *margin_top, *margin_bottom, *margin_left, *margin_right;
size_target->GetMarginProperties(&margin_top, &margin_bottom, &margin_left, &margin_right);
// Check if we have auto-margins; if so, they have to be set to the current margins.
if (margin_top->unit == Property::KEYWORD)
size_target->SetProperty(MARGIN_TOP, Property((float) Math::RealToInteger(size_target->GetBox().GetEdge(Box::MARGIN, Box::TOP)), Property::PX));
if (margin_right->unit == Property::KEYWORD)
size_target->SetProperty(MARGIN_RIGHT, Property((float) Math::RealToInteger(size_target->GetBox().GetEdge(Box::MARGIN, Box::RIGHT)), Property::PX));
if (margin_bottom->unit == Property::KEYWORD)
size_target->SetProperty(MARGIN_BOTTOM, Property((float) Math::RealToInteger(size_target->GetBox().GetEdge(Box::MARGIN, Box::BOTTOM)), Property::PX));
if (margin_left->unit == Property::KEYWORD)
size_target->SetProperty(MARGIN_LEFT, Property((float) Math::RealToInteger(size_target->GetBox().GetEdge(Box::MARGIN, Box::LEFT)), Property::PX));
int new_x = Math::RealToInteger(size_original_size.x + x);
int new_y = Math::RealToInteger(size_original_size.y + y);
size_target->SetProperty(WIDTH, Property(Math::Max< float >((float) new_x, 0), Property::PX));
size_target->SetProperty(HEIGHT, Property(Math::Max< float >((float) new_y, 0), Property::PX));
}
Dictionary parameters;
parameters.Set("handle_x", x);
parameters.Set("handle_y", y);
DispatchEvent("handledrag", parameters);
}
}
}
}
}
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