urho3d/Engine/UI/Button.cpp

//
// Urho3D Engine
// Copyright (c) 2008-2012 Lasse Öörni
//
// 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 "Button.h"
#include "Context.h"
#include "InputEvents.h"
#include "UIEvents.h"

#include "DebugNew.h"

OBJECTTYPESTATIC(Button);

Button::Button(Context* context) :
    BorderImage(context),
    pressedOffset_(IntVector2::ZERO),
    labelOffset_(IntVector2::ZERO),
    repeatDelay_(1.0f),
    repeatRate_(0.0f),
    repeatTimer_(0.0f),
    pressed_(false)
{
    active_ = true;
}

Button::~Button()
{
}

void Button::RegisterObject(Context* context)
{
    context->RegisterFactory<Button>();
}

void Button::SetStyle(const XMLElement& element)
{
    BorderImage::SetStyle(element);
    
    if (element.HasChild("pressedoffset"))
        SetPressedOffset(element.GetChild("pressedoffset").GetIntVector2("value"));
    if (element.HasChild("labeloffset"))
        SetLabelOffset(element.GetChild("labeloffset").GetIntVector2("value"));
    if (element.HasChild("repeat"))
    {
        XMLElement repeatElem = element.GetChild("repeat");
        SetRepeat(repeatElem.GetFloat("delay"), repeatElem.GetFloat("rate"));
    }
}

void Button::Update(float timeStep)
{
    if (!hovering_ && pressed_ == true)
        SetPressed(false);
    
    // Send repeat events if pressed
    if (pressed_ && repeatRate_ > 0.0f)
    {
        repeatTimer_ -= timeStep;
        if (repeatTimer_ <= 0.0f)
        {
            repeatTimer_ += 1.0f / repeatRate_;
            
            using namespace Pressed;
            
            VariantMap eventData;
            eventData[P_ELEMENT] = (void*)this;
            SendEvent(E_PRESSED, eventData);
        }
    }
}

void Button::GetBatches(PODVector<UIBatch>& batches, PODVector<UIQuad>& quads, const IntRect& currentScissor)
{
    IntVector2 offset(IntVector2::ZERO);
    if (hovering_)
        offset += hoverOffset_;
    if (pressed_ || selected_)
        offset += pressedOffset_;
    
    BorderImage::GetBatches(batches, quads, currentScissor, offset);
}

void Button::OnHover(const IntVector2& position, const IntVector2& screenPosition, int buttons, int qualifiers, Cursor* cursor)
{
    bool oldPressed = pressed_;
    SetPressed((buttons & MOUSEB_LEFT) != 0);
    hovering_ = true;
    
    if (oldPressed && !pressed_)
    {
        using namespace Released;
        
        VariantMap eventData;
        eventData[P_ELEMENT] = (void*)this;
        SendEvent(E_RELEASED, eventData);
    }
}

void Button::OnClick(const IntVector2& position, const IntVector2& screenPosition, int buttons, int qualifiers, Cursor* cursor)
{
    if (buttons & MOUSEB_LEFT)
    {
        SetPressed(true);
        repeatTimer_ = repeatDelay_;
        hovering_ = true;
        
        using namespace Pressed;
        
        VariantMap eventData;
        eventData[P_ELEMENT] = (void*)this;
        SendEvent(E_PRESSED, eventData);
    }
}

void Button::SetPressedOffset(const IntVector2& offset)
{
    pressedOffset_ = offset;
}

void Button::SetPressedOffset(int x, int y)
{
    pressedOffset_ = IntVector2(x, y);
}


void Button::SetLabelOffset(const IntVector2& offset)
{
    labelOffset_ = offset;
}

void Button::SetLabelOffset(int x, int y)
{
    labelOffset_ = IntVector2(x, y);
}

void Button::SetRepeat(float delay, float rate)
{
    SetRepeatDelay(delay);
    SetRepeatRate(rate);
}

void Button::SetRepeatDelay(float delay)
{
    repeatDelay_ = Max(delay, 0.0f);
}

void Button::SetRepeatRate(float rate)
{
    repeatRate_ = Max(rate, 0.0f);
}

void Button::SetPressed(bool enable)
{
    pressed_ = enable;
    SetChildOffset(pressed_ ? labelOffset_ : IntVector2::ZERO);
}