// called when window is resized
void Graph_disp::resize(Gtk::Allocation & allocation)
{
if(_gdk_window)
{
// set the GL viewport dimensions and perspective matrix
glViewport(0, 0, allocation.get_width(), allocation.get_height());
_perspective = glm::perspective((float)M_PI / 6.0f,
(float)allocation.get_width() / (float)allocation.get_height(),
0.1f, 1000.0f);
invalidate(); // redraw
}
}
/** Zoom in.
* Increases zoom factor by 20, no upper limit.
*/
void
SkillGuiGraphDrawingArea::zoom_in()
{
__scale_override = true;
Gtk::Allocation alloc = get_allocation();
double old_scale = __scale;
__scale /= 0.80;
double px, py;
px = (alloc.get_width()/2 - __translation_x ) / (old_scale * __bbw);
py = (alloc.get_height()/2 - __translation_y + __bbh * old_scale) / (old_scale * __bbh);
__translation_x = alloc.get_width()/2 - px*__bbw*__scale;
__translation_y = alloc.get_height()/2 - py*__bbh*__scale + __bbh * __scale;
queue_draw();
}
void MapDrawArea::DrawOptimalPath(const Cairo::RefPtr<Cairo::Context>& cr)
{
// This is where we draw on the window
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
const int lesser = MIN(width, height);
const Coord maxXY = guiMapData.copyMaxCoord();
// Copy the optimal path to the draw area
std::vector<Coord> optimalPath = guiMapData.copyOptPath();
// Plot the path
cr->save();
cr->set_source_rgb(1.0, 0.08, 0.58); // pink for path
cr->set_line_width(lesser * 0.005);
cr->set_line_cap(Cairo::LINE_CAP_ROUND);
for(std::vector<Coord>::iterator itr=optimalPath.begin();itr != optimalPath.end();++itr)
{
cr->move_to( int( float(width)*float(itr->x)/float(maxXY.x) ),int( height*float(itr->y)/float(maxXY.y)));
cr->line_to( int( float(width)*float(itr->x)/float(maxXY.x) ),int( height*float(itr->y)/float(maxXY.y)));
cr->stroke();
}
}
void
perftime::on_size_allocate (Gtk::Allocation & a_r)
{
Gtk::DrawingArea::on_size_allocate(a_r);
m_window_x = a_r.get_width();
m_window_y = a_r.get_height();
}
bool Simple_GOL_Area::on_button_press_event(GdkEventButton* event)
{
if(event->type == GDK_BUTTON_PRESS)
{
if(event->button == 1)
{
Gtk::Allocation allocation = get_allocation();
int item_x = int(sim_data->get_width()*event->x/allocation.get_width());
int item_y = int(sim_data->get_height()*event->y/allocation.get_height());
std::cout << item_x << " " << item_y << "\n";
mouse_button_one_down = (sim_data->get(item_x, item_y)+1)%2 + 1;
sim_data->set(item_x, item_y, (sim_data->get(item_x, item_y)+1)%2);
queue_draw();
}
else if(event->button == 3)
{
pause_toggle();
}
}
return true;
}
void
perfnames::on_size_allocate (Gtk::Allocation & a)
{
gui_drawingarea_gtk2::on_size_allocate(a);
m_window_x = a.get_width(); /* side-effect */
m_window_y = a.get_height(); /* side-effect */
}
bool guiRenderer2D::on_expose_event(GdkEventExpose* event) {
Glib::RefPtr<Gdk::Window> window = get_window();
if(window) {
Cairo::RefPtr<Cairo::Context> cr = window->create_cairo_context();
if(event) {
// clip to the area indicated by the expose event so that we only
// redraw the portion of the window that needs to be redrawn
//printf("event->area.x: %d, event->area.y: %d, event->area.width: %d, event->area.height: %d\n", event->area.x, event->area.y, event->area.width, event->area.height );
cr->rectangle(event->area.x, event->area.y, event->area.width, event->area.height);
cr->clip();
}
// Background
// cr->set_source_rgb(0.0, 0.0, 0.0);
cr->set_source_rgb(1.0, 1.0, 1.0);
cr->paint();
if(m_isRendering && m_layoutAvailable) {
Gtk::Allocation allocation = get_allocation();
int width = allocation.get_width();
int height = allocation.get_height();
if(width != m_widgetWidth || height != m_widgetHeight ) { // Allocation changed
rescaleSensorLayout(width, height);
}
drawMatrices(cr, width, height, false);
}
}
return true;
}
void MapDrawArea::DrawObstacles(const Cairo::RefPtr<Cairo::Context>& cr)
{
// Get size characteristics of the window
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
const int lesser = MIN(width, height);
// We should be able to just store the obstacles and path once
// Do need to update based on the window size
std::vector<Coord> vObstacles = guiMapData.copyObstacles();
Coord maxXY = guiMapData.copyMaxCoord();
Coord originCoord = guiMapData.copyStartCoord();
Coord goalCoord = guiMapData.copyEndCoord();
// These have to be updated each iteration
originCoord.x = int( float(width)*float(originCoord.x)/float(maxXY.x) );
originCoord.y = int( float(height)*float(originCoord.y)/float(maxXY.y) );
goalCoord.x = int( float(width)*float(goalCoord.x)/float(maxXY.x) );
goalCoord.y = int( float(height)*float(goalCoord.y)/float(maxXY.y) );
// Draw obstacles
std::vector<Coord> scaledObstacleCoord;
std::vector<Coord> rawObstacleCoord = guiMapData.copyObstacles();
Coord stdCoord;
// Adjust obstacle values based on window size
for(std::vector<Coord>::const_iterator itr=rawObstacleCoord.begin();itr!=rawObstacleCoord.end();++itr)
{
stdCoord.x = int( float(width)*float(itr->x)/float(maxXY.x) );
stdCoord.y = int( height*float(itr->y)/float(maxXY.y) );
scaledObstacleCoord.push_back(stdCoord);
}
cr->save();
cr->set_source_rgb(0.0, 0.0, 0.0); // black for obstacles
cr->set_line_width(lesser * 0.005);
cr->set_line_cap(Cairo::LINE_CAP_ROUND);
// Plot obstacles
for(std::vector<Coord>::iterator itr=scaledObstacleCoord.begin();itr != scaledObstacleCoord.end();++itr)
{
cr->move_to( itr->x,itr->y );
cr->line_to( itr->x,itr->y );
cr->stroke();
}
// Plot start/end coord
cr->save();
cr->set_line_width(lesser * 0.015);
cr->set_source_rgb(1.0, 0.0, 0.0); // red for start point
cr->move_to( originCoord.x,originCoord.y );
cr->line_to( originCoord.x,originCoord.y );
cr->stroke();
cr->save();
cr->set_source_rgb(0.0, 1.0, 0.0); // green for end point
cr->move_to( goalCoord.x,goalCoord.y );
cr->line_to( goalCoord.x,goalCoord.y );
cr->stroke();
}
/// Same as draw_buffer, with only the curr_item's full text
void
ViewDrawingArea::render_full_article()
{
// Dimensions of drawing area
Gtk::Allocation allocation = get_allocation();
const int height = allocation.get_height();
const int width = allocation.get_width();
Cairo::RefPtr<Cairo::Context> cr = _pixmap->create_cairo_context();
cr->reset_clip();
cr->rectangle (0.0, 0.0, width, height);
cr->clip();
cr->set_source_rgb (1.0, 1.0, 1.0);
cr->paint();
cr->set_source_rgb (0.0, 0.0, 0.0);
Item *item = AppContext::get().get_curr_item();
item->make_display_unit();
ItemDisplayUnit *du = item->get_display_unit();
du->render (cr, 0, -_vadj->get_value());
cr->show_page();
double h = du->get_height();
if (h > height)
_vadj->set_upper (h - height);
else
_vadj->set_upper (0);
_vadj->set_page_size (height);
_vadj->set_step_increment (height * 1.0/16.0);
_vadj->set_page_increment (height * 15.0/16.0);
_vadj->changed();
}
void ActivityDrawingArea::drawAxis() {
// draw a reference axis and pod info
Glib::RefPtr < Gdk::Window > window = get_window();
Cairo::RefPtr < Cairo::Context > cr = window->create_cairo_context();
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
//draw axis
cr->save();
cr->set_line_width(2.0);
this->setSourceRGB(cr, currentColourScheme.getAxisColour());
cr->set_font_size(12);
cr->move_to(0, height / 2);
cr->line_to(width, height / 2);
cr->move_to(190, 25 + height / 2);
cr->show_text("20");
cr->move_to(390, 25 + height / 2);
cr->show_text("40");
cr->move_to(590, 25 + height / 2);
cr->show_text("60");
cr->move_to(790, 25 + height / 2);
cr->show_text("80");
cr->stroke();
cr->restore();
}
/** Get dimensions
* @param width upon return contains width
* @param height upon return contains height
*/
void
SkillGuiGraphDrawingArea::get_dimensions(double &width, double &height)
{
Gtk::Allocation alloc = get_allocation();
width = alloc.get_width();
height = alloc.get_height();
}
bool Balls::on_draw(const Cairo::RefPtr<Cairo::Context>& cr)
{
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
cr->save();
cr->scale(width, height);
cr->set_line_width(0.001);
for (auto ball : balls_)
{
cr->set_source_rgb(ball.color_r,ball.color_g,ball.color_b);
cr->arc(ball.p.x,ball.p.y,
ball.rad,
0,2*M_PI);
cr->fill();
cr->stroke();
}
cr->restore();
const Ball &ball1 = balls_[balls_.size()-1];
std::ostringstream info;
info << "x = " << ball1.p.x << "\ny = " << ball1.p.y;
infobox_.show(cr,width,height,info.str());
return true;
}
bool CircuitWidget::on_button_press_event (GdkEventButton* event)
{
if (!circuit) {
return true;
} else if (event->button == 1 && event->type == GDK_2BUTTON_PRESS) {
// Double-click.
panning = false;
if(circuitDrawer.usingLineLabels()) {
// If a line label is double-clicked, edit it.
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
// translate mouse click coords into circuit diagram coords
double x = (event->x - width/2.0 + ext.width/2.0)/scale + cx;// - cx*scale;
double y = (event->y - height/2.0 + ext.height/2.0)/scale + cy;// - cy*scale;
vector<int> selections;
int res = pickRect(wirelabels, x, y, selections);
if(res>=0) {
edit_line_label(res);
}
}
return true;
} else if (event->button == 1) {
panning = true;
oldmousex = event->x;
oldmousey = event->y;
select_rect.x0 = event->x;
select_rect.y0 = event->y;
select_rect.width = 0;
select_rect.height = 0;
return true;
} else {
return true;
}
}
/* Callback on_draw */
bool SensorsMap::on_draw (const Cairo::RefPtr<Cairo::Context>& cr)
{
/* Get window allocation */
Gtk::Allocation allocation = get_allocation ();
const int width = allocation.get_width ();
const int height = allocation.get_height ();
/* Get center of the window */
int xc, yc;
xc = width / 2;
yc = height / 2;
// DEBUG
cr->set_line_width(10.0);
// draw red lines out from the center of the window
cr->set_source_rgb(0.8, 0.0, 0.0);
cr->move_to(0, 0);
cr->line_to(xc, yc);
cr->line_to(0, height);
cr->move_to(xc, yc);
cr->line_to(width, yc);
cr->stroke();
// END DEBUG
/* Return success */
return true;
}
bool CircuitWidget::on_expose_event(GdkEventExpose* event)
{
(void)event; // placate compiler..
Glib::RefPtr<Gdk::Window> window = get_window();
if(window) {
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
double xc = width/2.0;
double yc = height/2.0;
Cairo::RefPtr<Cairo::Context> cr = window->create_cairo_context();
circuitDrawer.renderCairo(cr->cobj());
cr->rectangle(event->area.x, event->area.y,
event->area.width, event->area.height);
cr->clip();
cr->rectangle (0, 0, width, height);
cr->set_source_rgb (1,1,1);
cr->fill ();
cr->translate (xc-ext.width/2.0-cx*scale, yc-ext.height/2.0-cy*scale);
if (circuit) {
rects = circuitDrawer.draw(*circuit, drawarch, drawparallel, ext, wirestart, wireend, scale, selections, ft_default, wirelabels);
generate_layout_rects ();
}
}
return true;
}
void ActivityDrawingArea::drawPoints(std::map<double, double> & ps, const double reference_line) {
//std::cout<<"ActivityDrawingArea::drawPoints: " <<std::endl;
// This is where we draw on the window
Glib::RefPtr < Gdk::Window > window = get_window();
Cairo::RefPtr < Cairo::Context > cr = window->create_cairo_context();
cr->save();
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
cr->set_line_width(2.0);
// std::cout<<"ActivityDrawingArea::drawPoints: colour: "<<"("<<main_colour[0]<<","<<main_colour[1]<<","<< main_colour[2] <<std::endl;
this->setSourceRGB(cr, currentColourScheme.getMainColour());
//scale the drawing in x and y
double maxy = 0;
std::map<double, double>::iterator it_ps = ps.begin();
while (it_ps != ps.end()) {
if (it_ps->second < 0 && -(it_ps->second) > maxy) {
maxy = -(it_ps->second);
} else if (it_ps->second > 0 && (it_ps->second) > maxy) {
maxy = (it_ps->second);
}
++it_ps;
}
double scaley = 0.2 * (double) ActivityDrawingArea::ACTIVITY_HEIGHT / maxy;
double scalex = 10;
it_ps = ps.begin();
if (it_ps != ps.end()) {
cr->move_to(scalex * it_ps->first, (0.5 * height) - (scaley * it_ps->second));
} else {
cr->move_to(0, height / 2);
}
while (it_ps != ps.end()) {
// std::cout<<"ActivityDrawingArea::drawPoints: " << it_ps->first <<","<<-it_ps->second<<std::endl;
cr->line_to((scalex * it_ps->first), (0.5 * height) - (scaley * it_ps->second));
++it_ps;
}
cr->stroke();
// draw reference line if not zero
if (reference_line>0.00001 || reference_line < -0.00001) {
Gdk::Color temp_colour(currentColourScheme.getMainColour());
this->setSourceRGB(cr, Gdk::Color("tomato"));
cr->set_line_width(1.0);
const std::vector<double> dashed= { 1.0 };
cr->set_dash(dashed, 1);
double scaled_reference_line = (0.5 * height) - (scaley * reference_line);
double neg_scaled_reference_line = (0.5 * height) + (scaley * reference_line);
cr->move_to(0, scaled_reference_line);
cr->line_to(width, scaled_reference_line);
cr->move_to(0, neg_scaled_reference_line);
cr->line_to(width, neg_scaled_reference_line);
cr->stroke();
}
cr->restore();
}
void
seqkeys::on_size_allocate (Gtk::Allocation & a_r)
{
Gtk::DrawingArea::on_size_allocate(a_r);
m_window_x = a_r.get_width();
m_window_y = a_r.get_height();
queue_draw();
}
void
seqtime::on_size_allocate (Gtk::Allocation & a)
{
gui_drawingarea_gtk2::on_size_allocate(a);
m_window_x = a.get_width();
m_window_y = a.get_height();
update_sizes();
}
void
seqdata::on_size_allocate (Gtk::Allocation & r)
{
gui_drawingarea_gtk2::on_size_allocate(r);
m_window_x = r.get_width();
m_window_y = r.get_height();
update_sizes();
}
void shuaxin__(){
Glib::RefPtr<Gdk::Window> w = da_->get_window();
if (w) {
Gtk::Allocation a = da_->get_allocation();
Gdk::Rectangle r(0, 0,a.get_width(),a.get_height());
w->invalidate_rect(r, false);
}
}
void
seqroll::on_size_allocate (Gtk::Allocation & a_r)
{
Gtk::DrawingArea::on_size_allocate(a_r);
m_window_x = a_r.get_width();
m_window_y = a_r.get_height();
update_sizes();
}
void inline ImageDrawable::calcRenderedImage(shared_ptr<Image> image, const Gtk::Allocation &allocation,
int &rwidth, int &rheight, double &rscale, double &rx, double &ry) {
const int awidth = allocation.get_width();
const int aheight = allocation.get_height();
switch (image->getOrientation().first) {
case Image::Rotate::ROTATE_NONE:
case Image::Rotate::ROTATE_180:
default:
rwidth = image->width();
rheight = image->height();
break;
case Image::Rotate::ROTATE_90:
case Image::Rotate::ROTATE_270:
rwidth = image->height();
rheight = image->width();
break;
}
if (std::isnan(zoom)) {
rscale = min((double)awidth / rwidth, (double)aheight / rheight);
if ((double)awidth / rwidth >= (double)aheight / rheight) {
rx = ((double)awidth - rscale * rwidth) / 2;
ry = 0;
} else {
rx = 0;
ry = ((double)aheight - rscale * rheight) / 2;
}
} else {
rscale = zoom;
rx = x + dragOffsetX;
ry = y + dragOffsetY;
if (rwidth * rscale < awidth) {
// Image width too small, centre horizontally
rx = ((double)awidth - rscale * rwidth) / 2;
} else if (rx > 0) {
// Gap at the left of the image, move to the left edge
rx = 0;
} else if (rx + rwidth * rscale < awidth) {
// Gap at the right of the image, move to the right edge
rx = awidth - rwidth * rscale;
}
if (rheight * rscale < aheight) {
// Image height too small, centre vertically
ry = ((double)aheight - rscale * rheight) / 2;
} else if (ry > 0) {
// Gap at the top of the image, move to the top edge
ry = 0;
} else if (ry + rheight * rscale < aheight) {
// Gap at the bottom of the image, move to the bottom edge
ry = aheight - rheight * rscale;
}
}
}
bool AdvEnvGUIScope::on_expose_event(GdkEventExpose* event)
{
Glib::RefPtr<Gdk::Window> window = get_window();
if (window)
{
float len, x, y, xscale, yscale;
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
Cairo::RefPtr<Cairo::Context> cr = window->create_cairo_context();
cr->set_line_width(2.0);
cr->set_source_rgb(0.0, 0.0, 0.0);
cr->paint();
cr->set_source_rgb(0.0, 0.8, 0.0);
cr->rectangle(event->area.x, event->area.y, event->area.width, event->area.height);
cr->clip();
cr->move_to(width, height);
len = m_valueDelay + m_valueAttackTime1 + m_valueAttackTime2 + m_valueAttackTime3 + m_valueAttackTime4 + m_valueReleaseTime1 + m_valueReleaseTime2 + m_valueReleaseTime3 + SUSTAIN_LEN;
xscale = (float) width / len;
yscale = (float) (height - 6);
x = m_valueDelay * xscale;
cr->line_to((int) x, height);
x += m_valueAttackTime1 * xscale;
y = m_valueAttackLevel1 * yscale;
cr->line_to((int) x, height - (int) y);
x += m_valueAttackTime2 * xscale;
y = m_valueAttackLevel2 * yscale;
cr->line_to((int) x, height - (int) y);
x += m_valueAttackTime3 * xscale;
y = m_valueAttackLevel3 * yscale;
cr->line_to((int) x, height - (int) y);
x += m_valueAttackTime4 * xscale;
y = m_valueSustain * yscale;
cr->line_to((int) x, height - (int) y);
x += SUSTAIN_LEN * xscale;
cr->line_to((int) x, height - (int) y);
x += m_valueReleaseTime1 * xscale;
y = m_valueReleaseLevel1 * yscale;
cr->line_to((int) x, height - (int) y);
x += m_valueReleaseTime2 * xscale;
y = m_valueReleaseLevel2 * yscale;
cr->line_to((int) x, height - (int) y);
x += m_valueReleaseTime3 * xscale;
cr->line_to((int) x, height);
x = m_valueDelay * xscale;
cr->line_to((int) x, height);
cr->stroke();
}
return true;
}
bool BookArea::on_draw(const Cairo::RefPtr<Cairo::Context> & cr)
{
Cairo::RefPtr<Cairo::Surface> surface = cr->get_target();
PageDescriptor pd = pages.get(pagenum);
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
const int rectangle_width = width;
const int rectangle_height = height;
//cr->set_antialias(ANTIALIAS_BEST);
cr->set_source_rgb(1.0, 1.0, 1.0);
DrawingUtils::draw_rectangle(cr, rectangle_width, rectangle_height);
cr->set_source_rgb(0.15, 0.15, 0.15);
//cr->set_source_rgb(1, 0.33, 0.33);
int start_pos = 0;
int itemid = 0;
for(PageContentItem pci : pd.items) {
if(pci.pct == PAGE_H1) {
start_pos += DrawingUtils::draw_h1(cr, pci.content, rectangle_width, rectangle_height);
}
else if(pci.pct == PAGE_H2) {
// Only pack out the header when it's not the first thing in the page
if (itemid != 0) {
start_pos += 35;
}
start_pos += DrawingUtils::draw_h2(cr, pci.content, rectangle_width, rectangle_height, start_pos);
start_pos += 35;
}
else if(pci.pct == PAGE_PARAGRAPH) {
start_pos += DrawingUtils::draw_text(cr, pci.content, rectangle_width, rectangle_height, start_pos);
}
else if(pci.pct == PAGE_FRAGMENT) {
start_pos += DrawingUtils::draw_fragment(cr, pci.content, rectangle_width, rectangle_height, start_pos);
}
itemid++;
}
//auto it = book.opf_files[0].metadata.find(MetadataType::TITLE);
//const ustring title = it->second.contents;
cr->set_source_rgb(0.5, 0.5, 0.5);
page_num_rect = DrawingUtils::draw_header(cr, rectangle_width, rectangle_height, "Pride and Prejudice", pagenum + 1);
return true;
}
double get_scale() {
Glib::RefPtr<Gdk::Window> window = get_window();
assert(window);
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
RefPtr<ImageSurface> img = gm.get_surface();
return min(min(width/(double)img->get_width(), height/(double)img->get_height()), 1.0);
}
void Simple_GOL_Area::draw_background(const Cairo::RefPtr<Cairo::Context>& cr)
{
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
cr->set_source_rgb(0,0,0);
cr->rectangle(0, 0, width, height);
cr->fill();
}
bool ListView::on_draw(const Cairo::RefPtr<Cairo::Context>& cr)
{
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
return true;
}
void GUI::get_display_area_size(Gtk::Allocation &scr, Controller &controller) {
auto container_size = controller.get_layout_size() ;
display_area_width=scr.get_width() ;
display_area_height=scr.get_height() ;
if (container_size.first == display_area_width && container_size.second == display_area_height) {
// If nothing changed we return.
display_area_size_changed = false ;
return ;
}
display_area_size_changed = true ;
controller.set_layout_size(scr.get_width(), scr.get_height()) ;
int width, height ;
get_size(width, height) ;
controller.set_window_size(width, height) ;
have_layout_size = true ;
if ( widget_current_image_to_display != NULL ) {
// Updating current image sizes and positions values.
controller.get_current_image_position() ;
if ( controller.get_image_size_gt_layout() || controller.get_image_lt_layout() ) {
set_img(controller.current_image_to_process, controller.current_image_to_display, controller) ; // It auto process conversion to RGB(A).
return ;
}
// Set image at right position.
display_area.move(*widget_current_image_to_display, controller.current_image_position.first, controller.current_image_position.second) ;
}
}
void CamWnd::onSizeAllocate(Gtk::Allocation& allocation)
{
getCamera().width = allocation.get_width();
getCamera().height = allocation.get_height();
getCamera().updateProjection();
m_window_observer->onSizeChanged(getCamera().width, getCamera().height);
queueDraw();
}
bool VistaDiagrama::on_expose_event(GdkEventExpose* event) {
this->set_size_request(this->ancho, this->alto);
// Gonzalo : TEST
Glib::RefPtr<Gdk::Window> window = get_window();
if (window) {
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
// coordinates for the center of the window
int xc, yc;
xc = width / 2;
yc = height / 2;
Cairo::RefPtr<Cairo::Context> cr = window->create_cairo_context();
cr->set_line_width(10.0);
// clip to the area indicated by the expose event so that we only redraw
// the portion of the window that needs to be redrawn
cr->rectangle(event->area.x, event->area.y, event->area.width,
event->area.height);
cr->clip();
// draw red lines out from the center of the window
cr->set_line_cap(Cairo::LINE_CAP_ROUND);
cr->set_source_rgb(0.8, 0.0, 0.0);
cr->move_to(20, 20);
cr->line_to(xc, yc);
cr->line_to(20, height - 20);
cr->move_to(xc, yc);
cr->line_to(width - 20, yc);
cr->stroke();
//RefPtr<Context> cr = this->get_window()->create_cairo_context();
/*cr->set_source_rgba(1, 1, 1, 1); // white
cr->paint();
cr->set_source_rgba(0, 0, 0, 1); // negro
cr->move_to(0, 0);
cr->line_to(this->ancho, this->alto);
VistaEntidad * entidad = new VistaEntidad();
entidad->setposfin(10, 10);
entidad->setposfin(20, 20);
entidad->dibujar(cr);*/
}
//delete entidad;
return true;
}