/*
 * @file ZoomInCmd.cpp
 */
#include "ZoomInCmd.h"
#include "WorkflowSceneManager.h"
#include "WorkflowConst.h"

namespace pai
{
	ZoomInCmd::ZoomInCmd(QGraphicsView *view, QUndoCommand *parent)
	:QUndoCommand(parent)
	{
		m_pView = view;
	}

	ZoomInCmd::~ZoomInCmd()
	{
	}

	void ZoomInCmd::undo()
	{
		if (m_pView == NULL)
		{
			return;
		}

		pai::graphics2d::WorkflowSceneManager *pWorkflowScene =
				dynamic_cast<pai::graphics2d::WorkflowSceneManager *>(m_pView->scene());
		if(pWorkflowScene)
		{
			//将放大的场景视图按比例缩小
			m_pView->scale(1/1.1, 1/1.1);
			//将缩放次数减1
			if(pWorkflowScene->GetZoomCount() > ZOOM_MINCOUNT)
			{
				pWorkflowScene->SetZoomCount(pWorkflowScene->GetZoomCount()-1);
			}
			m_pView->show();
		}
	}

	void ZoomInCmd::redo()
	{
		if (m_pView == NULL)
		{
			return;
		}

		pai::graphics2d::WorkflowSceneManager *pWorkflowScene =
				dynamic_cast<pai::graphics2d::WorkflowSceneManager *>(m_pView->scene());
		if(pWorkflowScene)
		{
			//将缩小的场景视图按比例放大
			m_pView->scale(1/0.9, 1/0.9);
			//将缩放次数加1
			if(pWorkflowScene->GetZoomCount() < ZOOM_MAXCOUNT)
			{
				pWorkflowScene->SetZoomCount(pWorkflowScene->GetZoomCount()+1);
			}
			m_pView->show();
		}
	}
}