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/*=========================================================================
Program: Visualization Toolkit
Module: vtkTooltipItem.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkTooltipItem.h"
#include "vtkContext2D.h"
#include "vtkContextScene.h"
#include "vtkPen.h"
#include "vtkBrush.h"
#include "vtkTextProperty.h"
#include "vtkTransform2D.h"
#include "vtkStdString.h"
#include "vtksys/ios/sstream"
#include "vtkObjectFactory.h"
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
vtkStandardNewMacro(vtkTooltipItem);
//-----------------------------------------------------------------------------
vtkTooltipItem::vtkTooltipItem() : PositionVector(0, 0)
{
this->Position = this->PositionVector.GetData();
this->TextProperties = vtkTextProperty::New();
this->TextProperties->SetVerticalJustificationToBottom();
this->TextProperties->SetJustificationToLeft();
this->TextProperties->SetColor(0.0, 0.0, 0.0);
this->Pen = vtkPen::New();
this->Pen->SetColor(0, 0, 0);
this->Pen->SetWidth(1.0);
this->Brush = vtkBrush::New();
this->Brush->SetColor(242, 242, 242);
}
//-----------------------------------------------------------------------------
vtkTooltipItem::~vtkTooltipItem()
{
this->Pen->Delete();
this->Brush->Delete();
this->TextProperties->Delete();
}
//-----------------------------------------------------------------------------
void vtkTooltipItem::SetPosition(const vtkVector2f &pos)
{
this->PositionVector = pos;
}
//-----------------------------------------------------------------------------
vtkVector2f vtkTooltipItem::GetPositionVector()
{
return this->PositionVector;
}
//-----------------------------------------------------------------------------
void vtkTooltipItem::SetText(const vtkStdString &text)
{
if (this->Text != text)
{
this->Text = text;
this->Modified();
}
}
//-----------------------------------------------------------------------------
vtkStdString vtkTooltipItem::GetText()
{
return this->Text;
}
//-----------------------------------------------------------------------------
void vtkTooltipItem::Update()
{
}
//-----------------------------------------------------------------------------
bool vtkTooltipItem::Paint(vtkContext2D *painter)
{
// This is where everything should be drawn, or dispatched to other methods.
vtkDebugMacro(<< "Paint event called in vtkTooltipItem.");
if (!this->Visible || !this->Text)
{
return false;
}
painter->ApplyPen(this->Pen);
painter->ApplyBrush(this->Brush);
painter->ApplyTextProp(this->TextProperties);
// Compute the bounds, then make a few adjustments to the size we will use
vtkVector2f bounds[2];
painter->ComputeStringBounds(this->Text, bounds[0].GetData());
if (bounds[1].GetX() == 0.0f && bounds[1].GetY() == 0.0f)
{
// This signals only non-renderable characters, so return
return false;
}
float scale[2];
float position[2];
painter->GetTransform()->GetScale(scale);
painter->GetTransform()->GetPosition(position);
bounds[0] = vtkVector2f(this->PositionVector.GetX()-5/scale[0],
this->PositionVector.GetY()-3/scale[1]);
bounds[1].Set(bounds[1].GetX()+10/scale[0], bounds[1].GetY()+10/scale[1]);
// Pull the tooltip back in if it will go off the edge of the screen.
float maxX = (this->Scene->GetViewWidth() - position[0])/scale[0];
if (bounds[0].GetX() >= maxX - bounds[1].GetX())
{
bounds[0].SetX(maxX - bounds[1].GetX());
}
// Draw a rectangle as background, and then center our text in there
painter->DrawRect(bounds[0].GetX(), bounds[0].GetY(), bounds[1].GetX(), bounds[1].GetY());
painter->DrawString(bounds[0].GetX()+5/scale[0], bounds[0].GetY()+3/scale[1], this->Text);
return true;
}
//-----------------------------------------------------------------------------
void vtkTooltipItem::PrintSelf(ostream &os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
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