pv/view/cursorheader.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #include "cursorheader.h"
  22
  23 #include "view.h"
  24
  25 #include <QApplication>
  26 #include <QMouseEvent>
  27
  28 #include <pv/widgets/popup.h>
  29
  30 using std::shared_ptr;
  31
  32 namespace pv {
  33 namespace view {
  34
  35 const int CursorHeader::CursorHeaderHeight = 26;
  36
  37 CursorHeader::CursorHeader(View &parent) :
  38         MarginWidget(parent),
  39         _dragging(false)
  40 {
  41         setMouseTracking(true);
  42 }
  43
  44 QSize CursorHeader::sizeHint() const
  45 {
  46         return QSize(0, CursorHeaderHeight);
  47 }
  48
  49 void CursorHeader::clear_selection()
  50 {
  51         CursorPair &cursors = _view.cursors();
  52         cursors.first()->select(false);
  53         cursors.second()->select(false);
  54         update();
  55 }
  56
  57 void CursorHeader::paintEvent(QPaintEvent*)
  58 {
  59         QPainter p(this);
  60         p.setRenderHint(QPainter::Antialiasing);
  61
  62         // Draw the cursors
  63         if (_view.cursors_shown()) {
  64                 _view.cursors().draw_markers(p, rect(), 0); //prefix);
  65         }
  66 }
  67
  68 void CursorHeader::mouseMoveEvent(QMouseEvent *e)
  69 {
  70         if (!(e->buttons() & Qt::LeftButton))
  71                 return;
  72
  73         if ((e->pos() - _mouse_down_point).manhattanLength() <
  74                 QApplication::startDragDistance())
  75                 return;
  76
  77         _dragging = true;
  78
  79         if (shared_ptr<TimeMarker> m = _grabbed_marker.lock())
  80                 m->set_time(_view.offset() +
  81                         ((double)e->x() + 0.5) * _view.scale());
  82 }
  83
  84 void CursorHeader::mousePressEvent(QMouseEvent *e)
  85 {
  86         if (e->buttons() & Qt::LeftButton) {
  87                 _mouse_down_point = e->pos();
  88
  89                 _grabbed_marker.reset();
  90
  91                 clear_selection();
  92
  93                 if (_view.cursors_shown()) {
  94                         CursorPair &cursors = _view.cursors();
  95                         if (cursors.first()->get_label_rect(
  96                                 rect()).contains(e->pos()))
  97                                 _grabbed_marker = cursors.first();
  98                         else if (cursors.second()->get_label_rect(
  99                                 rect()).contains(e->pos()))
 100                                 _grabbed_marker = cursors.second();
 101                 }
 102
 103                 if (shared_ptr<TimeMarker> m = _grabbed_marker.lock())
 104                         m->select();
 105
 106                 selection_changed();
 107         }
 108 }
 109
 110 void CursorHeader::mouseReleaseEvent(QMouseEvent *)
 111 {
 112         using pv::widgets::Popup;
 113
 114         if (!_dragging)
 115                 if (shared_ptr<TimeMarker> m = _grabbed_marker.lock()) {
 116                         Popup *const p = m->create_popup(&_view);
 117                         p->set_position(mapToGlobal(QPoint(m->get_x(),
 118                                 height())), Popup::Bottom);
 119                         p->show();
 120                 }
 121
 122         _dragging = false;
 123         _grabbed_marker.reset();
 124 }
 125
 126 } // namespace view
 127 } // namespace pv