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/*
* Copyright (C) 2005-2008 Team XBMC
* http://www.xbmc.org
*
* This Program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This Program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with XBMC; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
* http://www.gnu.org/copyleft/gpl.html
*
*/
#include "GUIResizeControl.h"
#include "GUIWindowManager.h"
#include "Key.h"
#include "utils/TimeUtils.h"
// time to reset accelerated cursors (digital movement)
#define MOVE_TIME_OUT 500L
CGUIResizeControl::CGUIResizeControl(int parentID, int controlID, float posX, float posY, float width, float height, const CTextureInfo& textureFocus, const CTextureInfo& textureNoFocus)
: CGUIControl(parentID, controlID, posX, posY, width, height)
, m_imgFocus(posX, posY, width, height, textureFocus)
, m_imgNoFocus(posX, posY, width, height, textureNoFocus)
{
m_frameCounter = 0;
m_lastMoveTime = 0;
m_fSpeed = 1.0;
m_fAnalogSpeed = 2.0f; // TODO: implement correct analog speed
m_fAcceleration = 0.2f; // TODO: implement correct computation of acceleration
m_fMaxSpeed = 10.0; // TODO: implement correct computation of maxspeed
ControlType = GUICONTROL_RESIZE;
SetLimits(0, 0, 720, 576); // defaults
}
CGUIResizeControl::~CGUIResizeControl(void)
{}
void CGUIResizeControl::Render()
{
if (m_bInvalidated)
{
m_imgFocus.SetWidth(m_width);
m_imgFocus.SetHeight(m_height);
m_imgNoFocus.SetWidth(m_width);
m_imgNoFocus.SetHeight(m_height);
}
if (HasFocus())
{
unsigned int alphaCounter = m_frameCounter + 2;
unsigned int alphaChannel;
if ((alphaCounter % 128) >= 64)
alphaChannel = alphaCounter % 64;
else
alphaChannel = 63 - (alphaCounter % 64);
alphaChannel += 192;
SetAlpha( (unsigned char)alphaChannel );
m_imgFocus.SetVisible(true);
m_imgNoFocus.SetVisible(false);
m_frameCounter++;
}
else
{
SetAlpha(0xff);
m_imgFocus.SetVisible(false);
m_imgNoFocus.SetVisible(true);
}
// render both so the visibility settings cause the frame counter to resetcorrectly
m_imgFocus.Render();
m_imgNoFocus.Render();
CGUIControl::Render();
}
bool CGUIResizeControl::OnAction(const CAction &action)
{
if (action.GetID() == ACTION_SELECT_ITEM)
{
// button selected - send message to parent
CGUIMessage message(GUI_MSG_CLICKED, GetID(), GetParentID());
SendWindowMessage(message);
return true;
}
if (action.GetID() == ACTION_ANALOG_MOVE)
{
Resize(m_fAnalogSpeed*action.GetAmount(), -m_fAnalogSpeed*action.GetAmount(1));
return true;
}
return CGUIControl::OnAction(action);
}
void CGUIResizeControl::OnUp()
{
UpdateSpeed(DIRECTION_UP);
Resize(0, -m_fSpeed);
}
void CGUIResizeControl::OnDown()
{
UpdateSpeed(DIRECTION_DOWN);
Resize(0, m_fSpeed);
}
void CGUIResizeControl::OnLeft()
{
UpdateSpeed(DIRECTION_LEFT);
Resize(-m_fSpeed, 0);
}
void CGUIResizeControl::OnRight()
{
UpdateSpeed(DIRECTION_RIGHT);
Resize(m_fSpeed, 0);
}
EVENT_RESULT CGUIResizeControl::OnMouseEvent(const CPoint &point, const CMouseEvent &event)
{
if (event.m_id == ACTION_MOUSE_DRAG)
{
if (event.m_state == 1)
{ // grab exclusive access
CGUIMessage msg(GUI_MSG_EXCLUSIVE_MOUSE, GetID(), GetParentID());
SendWindowMessage(msg);
}
else if (event.m_state == 3)
{ // release exclusive access
CGUIMessage msg(GUI_MSG_EXCLUSIVE_MOUSE, 0, GetParentID());
SendWindowMessage(msg);
}
Resize(event.m_offsetX, event.m_offsetY);
return EVENT_RESULT_HANDLED;
}
return EVENT_RESULT_UNHANDLED;
}
void CGUIResizeControl::UpdateSpeed(int nDirection)
{
if (CTimeUtils::GetFrameTime() - m_lastMoveTime > MOVE_TIME_OUT)
{
m_fSpeed = 1;
m_nDirection = DIRECTION_NONE;
}
m_lastMoveTime = CTimeUtils::GetFrameTime();
if (nDirection == m_nDirection)
{ // accelerate
m_fSpeed += m_fAcceleration;
if (m_fSpeed > m_fMaxSpeed) m_fSpeed = m_fMaxSpeed;
}
else
{ // reset direction and speed
m_fSpeed = 1;
m_nDirection = nDirection;
}
}
void CGUIResizeControl::AllocResources()
{
CGUIControl::AllocResources();
m_frameCounter = 0;
m_imgFocus.AllocResources();
m_imgNoFocus.AllocResources();
m_width = m_imgFocus.GetWidth();
m_height = m_imgFocus.GetHeight();
}
void CGUIResizeControl::FreeResources(bool immediately)
{
CGUIControl::FreeResources(immediately);
m_imgFocus.FreeResources(immediately);
m_imgNoFocus.FreeResources(immediately);
}
void CGUIResizeControl::DynamicResourceAlloc(bool bOnOff)
{
CGUIControl::DynamicResourceAlloc(bOnOff);
m_imgFocus.DynamicResourceAlloc(bOnOff);
m_imgNoFocus.DynamicResourceAlloc(bOnOff);
}
void CGUIResizeControl::SetInvalid()
{
CGUIControl::SetInvalid();
m_imgFocus.SetInvalid();
m_imgNoFocus.SetInvalid();
}
void CGUIResizeControl::Resize(float x, float y)
{
float width = m_width + x;
float height = m_height + y;
// check if we are within the bounds
if (width < m_x1) width = m_x1;
if (height < m_y1) height = m_y1;
if (width > m_x2) width = m_x2;
if (height > m_y2) height = m_y2;
// ok, now set the default size of the resize control
SetWidth(width);
SetHeight(height);
}
void CGUIResizeControl::SetPosition(float posX, float posY)
{
CGUIControl::SetPosition(posX, posY);
m_imgFocus.SetPosition(posX, posY);
m_imgNoFocus.SetPosition(posX, posY);
}
void CGUIResizeControl::SetAlpha(unsigned char alpha)
{
m_imgFocus.SetAlpha(alpha);
m_imgNoFocus.SetAlpha(alpha);
}
void CGUIResizeControl::UpdateColors()
{
CGUIControl::UpdateColors();
m_imgFocus.SetDiffuseColor(m_diffuseColor);
m_imgNoFocus.SetDiffuseColor(m_diffuseColor);
}
void CGUIResizeControl::SetLimits(float x1, float y1, float x2, float y2)
{
m_x1 = x1;
m_y1 = y1;
m_x2 = x2;
m_y2 = y2;
}
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