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#include "plotwidget.h"
PlotWidget::PlotWidget()
: _plot(nullptr),
_mouseIsIn(false),
_mouseX(0),
_mouseY(0),
_isButtonPressed(false),
_isZooming(false),
_isPanning(false),
_bpressStartX(0),
_bpressStartY(0) {
add_events(Gdk::POINTER_MOTION_MASK | Gdk::BUTTON_RELEASE_MASK |
Gdk::BUTTON_PRESS_MASK | Gdk::LEAVE_NOTIFY_MASK |
Gdk::SCROLL_MASK);
signal_motion_notify_event().connect(
sigc::mem_fun(*this, &PlotWidget::onMotion));
signal_leave_notify_event().connect(
sigc::mem_fun(*this, &PlotWidget::onLeave));
signal_button_press_event().connect(
sigc::mem_fun(*this, &PlotWidget::onButtonPress));
signal_button_release_event().connect(
sigc::mem_fun(*this, &PlotWidget::onButtonRelease));
signal_scroll_event().connect(sigc::mem_fun(*this, &PlotWidget::onScroll));
signal_draw().connect(sigc::mem_fun(*this, &PlotWidget::onDraw));
set_size_request(300, 200);
}
PlotWidget::~PlotWidget() { _linkedRedrawConnection.disconnect(); }
bool PlotWidget::onDraw(const Cairo::RefPtr<Cairo::Context>& cr) {
_beforeDrawSignal();
const Glib::RefPtr<Gdk::Window> window = get_window();
if (window && get_width() > 0 && get_height() > 0) {
if (_plot != nullptr) {
_plot->Draw(cr, get_width(), get_height());
if (_isZooming) {
cr->set_line_width(1.0);
cr->rectangle(_bpressStartX, _bpressStartY, _mouseX - _bpressStartX,
_mouseY - _bpressStartY);
cr->set_source_rgba(0.35, 0.35, 1.0, 0.4);
cr->fill_preserve();
cr->set_source_rgb(0.0, 0.0, 0.0);
cr->stroke();
}
} else {
cr->set_source_rgba(1, 1, 1, 1);
cr->paint();
cr->fill();
}
}
return true;
}
void PlotWidget::Update() { queue_draw(); }
bool PlotWidget::onMotion(GdkEventMotion* event) {
if (_plot) {
double posX, posY;
const bool isInside = _plot->ConvertToPlot(event->x, event->y, posX, posY);
if (_isZooming) {
_mouseX = event->x;
_mouseY = event->y;
Update();
} else if (_isPanning) {
_plot->Pan(event->x - _mouseX, event->y - _mouseY);
_mouseX = event->x;
_mouseY = event->y;
Update();
} else {
if (isInside) {
_mouseX = event->x;
_mouseY = event->y;
_mouseIsIn = true;
_onMouseMoved(posX, posY);
} else if (_mouseIsIn) {
_onMouseLeft();
_mouseIsIn = false;
}
}
}
return true;
}
bool PlotWidget::onLeave(GdkEventCrossing* /*event*/) {
if (_mouseIsIn) {
_onMouseLeft();
_mouseIsIn = false;
}
return true;
}
bool PlotWidget::onButtonPress(GdkEventButton* event) {
_isButtonPressed = true;
if (_plot) {
double posX, posY;
if (_plot->ConvertToPlot(event->x, event->y, posX, posY)) {
_mouseX = event->x;
_mouseY = event->y;
_bpressStartX = _mouseX;
_bpressStartY = _mouseY;
if (event->button == 1) // left
_isZooming = true;
else if (event->button == 3) // right
_isPanning = true;
}
}
return true;
}
bool PlotWidget::onButtonRelease(GdkEventButton* event) {
_isButtonPressed = false;
if (_plot) {
const double oldMouseX = _mouseX;
const double oldMouseY = _mouseY;
double posX, posY;
if (_plot->ConvertToPlot(event->x, event->y, posX, posY)) {
_mouseX = event->x;
_mouseY = event->y;
_onButtonReleased(posX, posY);
}
if (_isZooming) {
_isZooming = false;
if (_bpressStartX != _mouseX || _bpressStartY != _mouseY) {
double startX, startY;
_plot->ConvertToPlot(_bpressStartX, _bpressStartY, startX, startY);
_plot->ZoomTo(startX, startY, posX, posY);
}
}
if (_isPanning) {
_isPanning = false;
_plot->Pan(oldMouseX - event->x, oldMouseY - event->y);
}
Update();
}
return true;
}
bool PlotWidget::onScroll(GdkEventScroll* event) {
if (_plot) {
double posX, posY;
if (_plot->ConvertToPlot(event->x, event->y, posX, posY)) {
int direction = 0;
if (event->direction == GDK_SCROLL_UP)
direction = -1;
else if (event->direction == GDK_SCROLL_DOWN)
direction = 1;
_onScroll(posX, posY, direction);
}
}
return true;
}
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