daleclack/testing-repository
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testing-repository
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Update gtk118

This commit is contained in:
daleclack 2021-11-21 19:23:41 +08:00
parent f583790948
commit e6ebb9a2fc
2 changed files with 75 additions and 2 deletions
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8
Gtk4/gtk118_imageviewer/gtk118.code-workspace Normal file
View File

@ -0,0 +1,8 @@
{
"folders": [
{
"path": "."
}
],
"settings": {}
}

69
Gtk4/gtk118_imageviewer/src/MyImage.cpp
View File

@ -43,6 +43,37 @@ static void my_image_dispose(GObject * object){
G_OBJECT_CLASS(my_image_parent_class)->dispose(object);
}
static void my_image_measure(GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
MyImage * self = MY_IMAGE(widget);
int size;
//Measure size
if(orientation == GTK_ORIENTATION_HORIZONTAL){
size = gdk_paintable_get_intrinsic_width(GDK_PAINTABLE(self->paintable));
}else{
size = gdk_paintable_get_intrinsic_height(GDK_PAINTABLE(self->paintable));
}
*minimum = *natural = self->scale * size;
}
static void my_image_size_allocate(GtkWidget * widget,int width,int height,int baseline){
MyImage * self = MY_IMAGE(widget);
/* Since we are not using a layout manager (who would do this
* for us), we need to allocate a size for our menu by calling
* gtk_popover_present().
*/
gtk_popover_present(GTK_POPOVER(self->menu));
}
static void my_image_set_property(GObject * object,guint property_id,
const GValue * value,GParamSpec * spec)
{
@ -79,7 +110,7 @@ static void my_image_get_property(GObject * object,guint property_id,
break;
case PROP_SCALE:
g_value_set_object(value,&self->scale);
g_value_set_float(value,self->scale);
break;
default:
@ -93,12 +124,19 @@ static void my_image_snapshot(GtkWidget * widget,GtkSnapshot * snapshot){
int x,y,width,height;
double w,h;
//Get size for window
width = gtk_widget_get_width(widget);
height = gtk_widget_get_height(widget);
//Get size for paintable
w = self->scale * gdk_paintable_get_intrinsic_width(GDK_PAINTABLE(self->paintable));
h = self->scale * gdk_paintable_get_intrinsic_height(GDK_PAINTABLE(self->paintable));
//Get position
x=MAX(0,(width - ceil(w)) / 2);
y=MAX(0,(height - ceil(h)) / 2);
//Make a snapshot
graphene_rect_t rect = {0,0,(float)width,(float)height};
graphene_point_t point = {(float)x,(float)y};
gtk_snapshot_push_clip(snapshot,&rect);
@ -109,21 +147,43 @@ static void my_image_snapshot(GtkWidget * widget,GtkSnapshot * snapshot){
gtk_snapshot_pop(snapshot);
}
static void zoom_cb(GtkWidget * widget,const char * action_name,GVariant * parmeter){
MyImage * self = MY_IMAGE(widget);
float scale = self->scale;
//Zoom in or zoom out the image
if(g_str_equal(action_name,"zoom.in")){
scale = MIN(10 , self->scale * M_SQRT2);
}else if(g_str_equal(action_name,"zoom.out")){
scale = MAX(0, self->scale / M_SQRT2);
}else{
scale = 1.0;
}
gtk_widget_action_set_enabled (widget, "zoom.in", scale < 10);
gtk_widget_action_set_enabled (widget, "zoom.out", scale > 0.01);
gtk_widget_action_set_enabled (widget, "zoom.reset", scale != 1);
g_object_set (widget, "scale", scale, NULL);
}
static void my_image_init(MyImage * self){
self->scale = 1.f;
gtk_widget_init_template(GTK_WIDGET(self));
//self->paintable = gdk_paintable_new_empty(800,450);
}
static void my_image_class_init(MyImageClass * self_class){
GObjectClass * object_class = G_OBJECT_CLASS(self_class);
GtkWidgetClass * widget_class = GTK_WIDGET_CLASS(self_class);
//Link Function pointers
object_class->dispose = my_image_dispose;
object_class->set_property = my_image_set_property;
object_class->get_property = my_image_get_property;
widget_class->snapshot = my_image_snapshot;
widget_class->size_allocate = my_image_size_allocate;
widget_class->measure = my_image_measure;
//Add a property for paintable widget
g_object_class_install_property(object_class,PROP_PAINTABLE,
@ -139,6 +199,11 @@ static void my_image_class_init(MyImageClass * self_class){
gtk_widget_class_set_template_from_resource(GTK_WIDGET_CLASS(self_class),
"/org/gtk/daleclack/MyImage.ui");
/* These are the actions that we are using in the menu */
gtk_widget_class_install_action (widget_class, "zoom.in", NULL, zoom_cb);
gtk_widget_class_install_action (widget_class, "zoom.out", NULL, zoom_cb);
gtk_widget_class_install_action (widget_class, "zoom.reset", NULL, zoom_cb);
//Bind Childs
gtk_widget_class_bind_template_child(GTK_WIDGET_CLASS(self_class),MyImage,menu);
gtk_widget_class_bind_template_callback(self_class,pressed_cb);