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Update gtk119

This commit is contained in:
daleclack 2021-12-26 13:40:09 +08:00
parent ce64902cc8
commit e3bb0b1c45
1 changed files with 6 additions and 0 deletions
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6
Gtkmm3/gtk119_imageviewer2/src/MyImage.cc
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@ -16,12 +16,14 @@ bool MyImage::on_draw(const Cairo::RefPtr<Cairo::Context> &cr){
int width = image->get_width(); int width = image->get_width();
int height = image->get_height(); int height = image->get_height();
//Set the default size for drawing area
set_size_request(width,height); set_size_request(width,height);
// Draw the image in the middle of the drawing area, or (if the image is // Draw the image in the middle of the drawing area, or (if the image is
// larger than the drawing area) draw the middle part of the image. // larger than the drawing area) draw the middle part of the image.
Gdk::Cairo::set_source_pixbuf(cr, image, Gdk::Cairo::set_source_pixbuf(cr, image,
(width - image->get_width())/2, (height - image->get_height())/2); (width - image->get_width())/2, (height - image->get_height())/2);
cr->paint(); cr->paint();
return true; return true;
@ -29,6 +31,10 @@ bool MyImage::on_draw(const Cairo::RefPtr<Cairo::Context> &cr){
void MyImage::set_pixbuf(const Glib::RefPtr<Gdk::Pixbuf> &pixbuf) void MyImage::set_pixbuf(const Glib::RefPtr<Gdk::Pixbuf> &pixbuf)
{ {
if(image){
image.reset();
}
image = pixbuf; image = pixbuf;
//ReDraw the draw area //ReDraw the draw area