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Adding zoom feature.

This commit is contained in:
sergiotarxz 2021-11-23 22:03:45 +01:00
parent ca593b482c
commit 78cc873530
2 changed files with 36 additions and 16 deletions
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50
src/view/chapter_view.c
View File

@ -1,3 +1,5 @@
#include <math.h>
#include <gtk/gtk.h>
#include <gdk/gdk.h>
@ -19,6 +21,7 @@ typedef struct {
GtkPicture *current_picture;
AdwLeaflet *views_leaflet;
GtkScrolledWindow *zoomable_picture_container;
double zoom;
} ChapterVisorData;
static void
@ -38,24 +41,40 @@ go_prev (GtkButton *prev,
static void
go_next (GtkButton *next,
gpointer user_data);
static void
set_image_dimensions (GtkWidget *picture,
ChapterVisorData *chapter_visor_data);
static void
image_page_show (GtkWidget *picture, gpointer user_data) {
GtkWidget *views_leaflet = GTK_WIDGET (user_data);
GdkPaintable *paintable = gtk_picture_get_paintable (GTK_PICTURE (picture));
ChapterVisorData *chapter_visor_data = (ChapterVisorData *) user_data;
chapter_visor_data->zoom = 1;
set_image_dimensions (picture, chapter_visor_data);
}
static void
set_image_dimensions (GtkWidget *picture,
ChapterVisorData *chapter_visor_data) {
double final_width = 0;
double final_height = 0;
GdkPaintable *paintable = gtk_picture_get_paintable (GTK_PICTURE (picture));
GtkWidget *views_leaflet = GTK_WIDGET (chapter_visor_data->views_leaflet);
guint width = gtk_widget_get_allocated_width
(views_leaflet);
(views_leaflet) * chapter_visor_data->zoom;
gdk_paintable_compute_concrete_size (
paintable,
width,
0,
gdk_paintable_get_intrinsic_width (paintable),
gdk_paintable_get_intrinsic_height (paintable),
&final_width,
&final_height
);
paintable,
width,
0,
gdk_paintable_get_intrinsic_width (paintable),
gdk_paintable_get_intrinsic_height (paintable),
&final_width,
&final_height
);
g_object_set_property_int (G_OBJECT (picture),
"width-request", (int) final_width);
g_object_set_property_int (G_OBJECT (picture),
"height-request", (int) final_height);
g_object_set_property_int (G_OBJECT (picture),
"width-request", (int) final_width);
g_object_set_property_int (G_OBJECT (picture),
@ -129,7 +148,6 @@ set_image_zoomable_picture_container (ChapterVisorData *chapter_visor_data) {
GtkPicture *current_picture;
GListModel *pages = chapter_visor_data->pages;
guint current_page = chapter_visor_data->current_page;
AdwLeaflet *views_leaflet = chapter_visor_data->views_leaflet;
const char *url_image_not_owned =
gtk_string_list_get_string (GTK_STRING_LIST
(pages), current_page);
@ -143,7 +161,7 @@ set_image_zoomable_picture_container (ChapterVisorData *chapter_visor_data) {
(url_image, 0);
chapter_visor_data->current_picture = current_picture;
g_signal_connect (G_OBJECT (current_picture), "map",
G_CALLBACK (image_page_show), views_leaflet);
G_CALLBACK (image_page_show), chapter_visor_data);
gtk_scrolled_window_set_child (zoomable_picture_container, GTK_WIDGET (current_picture));
g_free (url_image);
@ -181,5 +199,9 @@ static void
fire_zoom (GtkGestureZoom *zoom,
gdouble scale,
gpointer user_data) {
printf("%0.2f", scale);
ChapterVisorData *chapter_visor_data = (ChapterVisorData *) user_data;
gdouble scale_factor = log (scale) / 10 + log (chapter_visor_data->zoom);
chapter_visor_data->zoom = pow (M_E, scale_factor);
set_image_dimensions (GTK_WIDGET (chapter_visor_data->current_picture),
chapter_visor_data);
}

2
src/view/picture.c
View File

@ -13,8 +13,6 @@ create_picture_from_url (const char *const url, gint picture_size) {
GError *error = NULL;
GdkTexture *texture;
printf("%s\n", url);
size_t size_downloaded_image = 0;
char *downloaded_image;