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This commit is contained in:
daleclack 2021-12-28 16:43:23 +08:00
parent c8564d9af2
commit f8862162ae
3 changed files with 58 additions and 51 deletions

View File

@ -1,7 +1,7 @@
#include "MyImage.hh"
MyImage::MyImage()
:scale_radio(1.0)
: scale_radio(1.0)
{
}
@ -17,8 +17,8 @@ bool MyImage::on_draw(const Cairo::RefPtr<Cairo::Context> &cr)
}
// Set the default size for drawing area
set_size_request(surface->get_width()*scale_radio,
surface->get_height()*scale_radio);
set_size_request(surface->get_width() * scale_radio,
surface->get_height() * scale_radio);
cr->scale(scale_radio, scale_radio);
cr->set_source(surface, 0, 0);
@ -31,11 +31,13 @@ bool MyImage::on_draw(const Cairo::RefPtr<Cairo::Context> &cr)
void MyImage::scale_draw(double scale)
{
// Set the scale radio and scale
if(scale <= 0){
if (scale <= 0)
{
scale_radio = 0.1;
return;
}
if(scale > 10.0){
if (scale > 10.0)
{
scale_radio = 10.0;
return;
}
@ -62,7 +64,7 @@ void MyImage::set_pixbuf(const Glib::RefPtr<Gdk::Pixbuf> &pixbuf)
{
}
//Get Image Size
// Get Image Size
int width = image->get_width();
int height = image->get_height();
// Draw the image in the middle of the surface, or (if the image is

View File

@ -2,18 +2,21 @@
#include <gtkmm.h>
class MyImage : public Gtk::DrawingArea{
public:
MyImage();
virtual ~MyImage();
//Set a Pixbuf to draw
void set_pixbuf(const Glib::RefPtr<Gdk::Pixbuf> &pixbuf);
//Scale the image
void scale_draw(double scale);
protected:
bool on_draw(const Cairo::RefPtr<Cairo::Context> &cr) override;
private:
double scale_radio;
Cairo::RefPtr<Cairo::ImageSurface> surface;
Glib::RefPtr<Gdk::Pixbuf> image;
class MyImage : public Gtk::DrawingArea
{
public:
MyImage();
virtual ~MyImage();
// Set a Pixbuf to draw
void set_pixbuf(const Glib::RefPtr<Gdk::Pixbuf> &pixbuf);
// Scale the image
void scale_draw(double scale);
protected:
bool on_draw(const Cairo::RefPtr<Cairo::Context> &cr) override;
private:
double scale_radio;
Cairo::RefPtr<Cairo::ImageSurface> surface;
Glib::RefPtr<Gdk::Pixbuf> image;
};

View File

@ -3,37 +3,39 @@
#include <gtkmm.h>
#include "MyImage.hh"
class MyWin : public Gtk::ApplicationWindow{
public:
MyWin();
private:
//Child widgets
Gtk::ScrolledWindow sw;
MyImage image_area;
Gtk::Box main_box,btnbox;
Gtk::Button btnopen;
Gtk::Scale scale;
Gtk::Overlay overlay;
Glib::RefPtr<Gtk::Adjustment> m_adjustment,hadjustment,vadjustment;
Glib::RefPtr<Gtk::FileChooserNative> dialog;
class MyWin : public Gtk::ApplicationWindow
{
public:
MyWin();
//Gesture control
Glib::RefPtr<Gtk::GestureDrag> gesture_drag;
Glib::RefPtr<Gtk::GestureMultiPress> gesture_click;
void drag_begin(double x,double y);
void drag_update(double x,double y);
void drag_end(double x,double y);
void move_to(double x,double y);
private:
// Child widgets
Gtk::ScrolledWindow sw;
MyImage image_area;
Gtk::Box main_box, btnbox;
Gtk::Button btnopen;
Gtk::Scale scale;
Gtk::Overlay overlay;
Glib::RefPtr<Gtk::Adjustment> m_adjustment, hadjustment, vadjustment;
Glib::RefPtr<Gtk::FileChooserNative> dialog;
//Menu for image control
Gtk::PopoverMenu popover;
void press(int n_press,double x,double y);
//Signal Handlers
void btnopen_clicked();
void dialog_response(int response_id);
void scale_changed();
void image_zoom_in();
void image_zoom_out();
void image_zoom_reset();
// Gesture control
Glib::RefPtr<Gtk::GestureDrag> gesture_drag;
Glib::RefPtr<Gtk::GestureMultiPress> gesture_click;
void drag_begin(double x, double y);
void drag_update(double x, double y);
void drag_end(double x, double y);
void move_to(double x, double y);
// Menu for image control
Gtk::PopoverMenu popover;
void press(int n_press, double x, double y);
// Signal Handlers
void btnopen_clicked();
void dialog_response(int response_id);
void scale_changed();
void image_zoom_in();
void image_zoom_out();
void image_zoom_reset();
};