PointPicker.cpp
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1 /* Copyright (C) 2008 National Institute For Space Research (INPE) - Brazil.
2 
3  This file is part of the TerraLib - a Framework for building GIS enabled applications.
4 
5  TerraLib is free software: you can redistribute it and/or modify
6  it under the terms of the GNU Lesser General Public License as published by
7  the Free Software Foundation, either version 3 of the License,
8  or (at your option) any later version.
9 
10  TerraLib is distributed in the hope that it will be useful,
11  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  GNU Lesser General Public License for more details.
14 
15  You should have received a copy of the GNU Lesser General Public License
16  along with TerraLib. See COPYING. If not, write to
17  TerraLib Team at <terralib-team@terralib.org>.
18  */
19 
20 /*!
21  \file terralib/qt/widgets/tools/PointPicker.cpp
22 
23  \brief This class implements a concrete tool to geographic coordinate picker on mouse click operation.
24 */
25 
26 // TerraLib
27 #include "../canvas/MapDisplay.h"
28 #include "PointPicker.h"
29 
30 // Qt
31 #include <QMouseEvent>
32 
34  : AbstractTool(display, parent)
35 {
36  setCursor(cursor);
37 }
38 
40 
42 {
43  if(e->button() != Qt::LeftButton)
44  return false;
45 
46  m_display->repaint();
47 
48  return true;
49 }
50 
52 {
53  m_display->repaint();
54 #if QT_VERSION >= 0x050000
55  QPointF p = e->localPos();
56 #else
57  QPointF p = e->posF();
58 #endif
59 
60  p = m_display->transform(p);
61  if (!p.isNull())
62  emit pointPickerMoving(p);
63  return true;
64 }
65 
67 {
68 #if QT_VERSION >= 0x050000
69  QPointF p = e->localPos();
70 #else
71  QPointF p = e->posF();
72 #endif
73 
74  p = m_display->transform(p);
75  if(!p.isNull())
76  emit pointPicked(p);
77 
78  return true;
79 }
bool mousePressEvent(QMouseEvent *e)
This event handler can be reimplemented in a concrete tool class to receive mouse press events for th...
Definition: PointPicker.cpp:41
bool mouseReleaseEvent(QMouseEvent *e)
This event handler can be reimplemented in a concrete tool class to receive mouse release events for ...
Definition: PointPicker.cpp:66
A widget to control the display of a set of layers.
This class defines an interface for objects that can receive application events and respond to them...
Definition: AbstractTool.h:63
void pointPicked(QPointF &coordinate)
virtual QPointF transform(const QPointF &p)
Transforms the given point, in screen coordinates, to a point in world coordinates.
void pointPickerMoving(QPointF &coordinate)
PointPicker(MapDisplay *display, const QCursor &cursor, QObject *parent=0)
It constructs a coordinate tracking tool associated with the given map display.
Definition: PointPicker.cpp:33
virtual void setCursor(const QCursor &cursor)
It sets the tool cursor.
te::gm::Polygon * p
This class implements a concrete tool to geographic coordinate picker on mouse click operation...
MapDisplay * m_display
The map display associated with the tool.
Definition: AbstractTool.h:171
bool mouseMoveEvent(QMouseEvent *e)
This event handler can be reimplemented in a concrete tool class to receive mouse move events for the...
Definition: PointPicker.cpp:51