415 lines
12 KiB
C
415 lines
12 KiB
C
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#include <math.h>
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#include "demo3widget.h"
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enum
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{
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PROP_TEXTURE = 1,
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PROP_FILTER,
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PROP_SCALE,
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PROP_ANGLE,
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};
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struct _Demo3Widget
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{
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GtkWidget parent_instance;
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GdkTexture *texture;
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float scale;
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float angle;
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GskScalingFilter filter;
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GtkWidget *menu;
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};
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struct _Demo3WidgetClass
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{
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GtkWidgetClass parent_class;
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};
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G_DEFINE_TYPE (Demo3Widget, demo3_widget, GTK_TYPE_WIDGET)
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static gboolean
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query_tooltip (GtkWidget *widget,
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int x,
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int y,
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gboolean keyboard_mode,
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GtkTooltip *tooltip,
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gpointer data)
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{
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Demo3Widget *self = DEMO3_WIDGET (widget);
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GtkWidget *grid;
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GtkWidget *label;
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char *s, *s2;
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const char *filter[] = { "Linear", "Nearest", "Trilinear" };
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int precision, l;
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grid = gtk_grid_new ();
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gtk_grid_set_column_spacing (GTK_GRID (grid), 12);
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gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
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label = gtk_label_new ("Texture");
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gtk_label_set_xalign (GTK_LABEL (label), 0);
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gtk_grid_attach (GTK_GRID (grid), label, 0, 0, 1, 1);
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s = g_strdup_printf ("%d\342\200\206\303\227\342\200\206%d",
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gdk_texture_get_width (self->texture),
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gdk_texture_get_height (self->texture));
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label = gtk_label_new (s);
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g_free (s);
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gtk_label_set_xalign (GTK_LABEL (label), 1);
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gtk_grid_attach (GTK_GRID (grid), label, 1, 0, 1, 1);
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label = gtk_label_new ("Rotation");
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gtk_label_set_xalign (GTK_LABEL (label), 0);
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gtk_grid_attach (GTK_GRID (grid), label, 0, 1, 1, 1);
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s = g_strdup_printf ("%.1f", self->angle);
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if (g_str_has_suffix (s, ".0"))
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s[strlen (s) - 2] = '\0';
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s2 = g_strconcat (s, "\302\260", NULL);
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label = gtk_label_new (s2);
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g_free (s2);
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g_free (s);
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gtk_label_set_xalign (GTK_LABEL (label), 1);
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gtk_grid_attach (GTK_GRID (grid), label, 1, 1, 1, 1);
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label = gtk_label_new ("Scale");
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gtk_label_set_xalign (GTK_LABEL (label), 0);
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gtk_grid_attach (GTK_GRID (grid), label, 0, 2, 1, 1);
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precision = 1;
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s = NULL;
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do {
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g_free (s);
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s = g_strdup_printf ("%.*f", precision, self->scale);
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l = strlen (s) - 1;
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while (s[l] == '0')
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l--;
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if (s[l] == '.')
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s[l] = '\0';
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precision++;
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} while (strcmp (s, "0") == 0);
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label = gtk_label_new (s);
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g_free (s);
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gtk_label_set_xalign (GTK_LABEL (label), 1);
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gtk_grid_attach (GTK_GRID (grid), label, 1, 2, 1, 1);
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label = gtk_label_new ("Filter");
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gtk_label_set_xalign (GTK_LABEL (label), 0);
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gtk_grid_attach (GTK_GRID (grid), label, 0, 3, 1, 1);
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label = gtk_label_new (filter[self->filter]);
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gtk_label_set_xalign (GTK_LABEL (label), 1);
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gtk_grid_attach (GTK_GRID (grid), label, 1, 3, 1, 1);
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gtk_tooltip_set_custom (tooltip, grid);
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return TRUE;
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}
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static void
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demo3_widget_init (Demo3Widget *self)
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{
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self->scale = 1.f;
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self->angle = 0.f;
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self->filter = GSK_SCALING_FILTER_LINEAR;
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gtk_widget_init_template (GTK_WIDGET (self));
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}
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static void
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demo3_widget_dispose (GObject *object)
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{
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Demo3Widget *self = DEMO3_WIDGET (object);
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g_clear_object (&self->texture);
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gtk_widget_dispose_template (GTK_WIDGET (self), DEMO3_TYPE_WIDGET);
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G_OBJECT_CLASS (demo3_widget_parent_class)->dispose (object);
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}
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static void
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demo3_widget_snapshot (GtkWidget *widget,
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GtkSnapshot *snapshot)
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{
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Demo3Widget *self = DEMO3_WIDGET (widget);
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int x, y, width, height;
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double w, h, w2, h2;
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width = gtk_widget_get_width (widget);
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height = gtk_widget_get_height (widget);
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w2 = w = self->scale * gdk_texture_get_width (self->texture);
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h2 = h = self->scale * gdk_texture_get_height (self->texture);
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if (G_APPROX_VALUE (self->angle, 90.f, FLT_EPSILON) ||
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G_APPROX_VALUE (self->angle, 270.f, FLT_EPSILON))
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{
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double s = w2;
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w2 = h2;
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h2 = s;
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}
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x = (width - ceil (w2)) / 2;
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y = (height - ceil (h2)) / 2;
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gtk_snapshot_push_clip (snapshot, &GRAPHENE_RECT_INIT (0, 0, width, height));
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gtk_snapshot_save (snapshot);
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gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (x, y));
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gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (w2 / 2, h2 / 2));
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gtk_snapshot_rotate (snapshot, self->angle);
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gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (- w / 2, - h / 2));
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gtk_snapshot_append_scaled_texture (snapshot,
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self->texture,
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self->filter,
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&GRAPHENE_RECT_INIT (0, 0, w, h));
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gtk_snapshot_restore (snapshot);
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gtk_snapshot_pop (snapshot);
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}
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static void
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demo3_widget_measure (GtkWidget *widget,
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GtkOrientation orientation,
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int for_size,
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int *minimum,
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int *natural,
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int *minimum_baseline,
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int *natural_baseline)
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{
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Demo3Widget *self = DEMO3_WIDGET (widget);
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int width, height;
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int size;
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width = gdk_texture_get_width (self->texture);
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height = gdk_texture_get_height (self->texture);
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if (G_APPROX_VALUE (self->angle, 90.f, FLT_EPSILON) ||
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G_APPROX_VALUE (self->angle, 270.f, FLT_EPSILON))
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{
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int s = width;
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width = height;
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height = s;
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}
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if (orientation == GTK_ORIENTATION_HORIZONTAL)
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size = width;
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else
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size = height;
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*minimum = *natural = (int) ceil (self->scale * size);
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}
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static void
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demo3_widget_size_allocate (GtkWidget *widget,
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int width,
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int height,
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int baseline)
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{
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Demo3Widget *self = DEMO3_WIDGET (widget);
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/* Since we are not using a layout manager (who would do this
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* for us), we need to allocate a size for our menu by calling
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* gtk_popover_present().
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*/
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gtk_popover_present (GTK_POPOVER (self->menu));
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}
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static void update_actions (Demo3Widget *self);
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static void
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demo3_widget_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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Demo3Widget *self = DEMO3_WIDGET (object);
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switch (prop_id)
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{
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case PROP_TEXTURE:
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g_clear_object (&self->texture);
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self->texture = g_value_dup_object (value);
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self->scale = 1.f;
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self->angle = 0.f;
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self->filter = GSK_SCALING_FILTER_LINEAR;
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update_actions (self);
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gtk_widget_queue_resize (GTK_WIDGET (object));
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g_object_notify (object, "scale");
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g_object_notify (object, "angle");
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g_object_notify (object, "filter");
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break;
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case PROP_SCALE:
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self->scale = g_value_get_float (value);
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update_actions (self);
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gtk_widget_queue_resize (GTK_WIDGET (object));
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break;
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case PROP_ANGLE:
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self->angle = fmodf (g_value_get_float (value), 360.f);
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gtk_widget_queue_resize (GTK_WIDGET (object));
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break;
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case PROP_FILTER:
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self->filter = g_value_get_enum (value);
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gtk_widget_queue_resize (GTK_WIDGET (object));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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demo3_widget_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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Demo3Widget *self = DEMO3_WIDGET (object);
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switch (prop_id)
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{
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case PROP_TEXTURE:
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g_value_set_object (value, self->texture);
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break;
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case PROP_SCALE:
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g_value_set_float (value, self->scale);
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break;
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case PROP_ANGLE:
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g_value_set_float (value, self->angle);
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break;
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case PROP_FILTER:
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g_value_set_enum (value, self->filter);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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pressed_cb (GtkGestureClick *gesture,
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guint n_press,
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double x,
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double y,
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Demo3Widget *self)
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{
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/* We are placing our menu at the point where
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* the click happened, before popping it up.
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*/
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gtk_popover_set_pointing_to (GTK_POPOVER (self->menu),
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&(const GdkRectangle){ x, y, 1, 1 });
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gtk_popover_popup (GTK_POPOVER (self->menu));
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}
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static void
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update_actions (Demo3Widget *self)
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{
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gtk_widget_action_set_enabled (GTK_WIDGET (self), "zoom.in", self->scale < 1024.);
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gtk_widget_action_set_enabled (GTK_WIDGET (self), "zoom.out", self->scale > 1./1024.);
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gtk_widget_action_set_enabled (GTK_WIDGET (self), "zoom.reset", self->scale != 1.);
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}
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static void
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zoom_cb (GtkWidget *widget,
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const char *action_name,
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GVariant *parameter)
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{
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Demo3Widget *self = DEMO3_WIDGET (widget);
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float scale;
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if (g_str_equal (action_name, "zoom.in"))
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scale = MIN (1024., self->scale * M_SQRT2);
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else if (g_str_equal (action_name, "zoom.out"))
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scale = MAX (1./1024., self->scale / M_SQRT2);
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else if (g_str_equal (action_name, "zoom.reset"))
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scale = 1.0;
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else
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g_assert_not_reached ();
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g_object_set (widget, "scale", scale, NULL);
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}
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static void
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rotate_cb (GtkWidget *widget,
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const char *action_name,
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GVariant *parameter)
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{
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Demo3Widget *self = DEMO3_WIDGET (widget);
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int angle;
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g_variant_get (parameter, "i", &angle);
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g_object_set (widget, "angle", fmodf (self->angle + angle, 360.f), NULL);
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}
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static void
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demo3_widget_class_init (Demo3WidgetClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
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object_class->dispose = demo3_widget_dispose;
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object_class->set_property = demo3_widget_set_property;
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object_class->get_property = demo3_widget_get_property;
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widget_class->snapshot = demo3_widget_snapshot;
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widget_class->measure = demo3_widget_measure;
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widget_class->size_allocate = demo3_widget_size_allocate;
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g_object_class_install_property (object_class, PROP_TEXTURE,
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g_param_spec_object ("texture", NULL, NULL,
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GDK_TYPE_TEXTURE,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_SCALE,
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g_param_spec_float ("scale", NULL, NULL,
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1./1024., 1024., 1.0,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_ANGLE,
|
||
|
|
g_param_spec_float ("angle", NULL, NULL,
|
||
|
|
0.0, 360.0, 0.0,
|
||
|
|
G_PARAM_READWRITE));
|
||
|
|
|
||
|
|
g_object_class_install_property (object_class, PROP_FILTER,
|
||
|
|
g_param_spec_enum ("filter", NULL, NULL,
|
||
|
|
GSK_TYPE_SCALING_FILTER, GSK_SCALING_FILTER_LINEAR,
|
||
|
|
G_PARAM_READWRITE));
|
||
|
|
|
||
|
|
/* 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);
|
||
|
|
gtk_widget_class_install_action (widget_class, "rotate", "i", rotate_cb);
|
||
|
|
|
||
|
|
gtk_widget_class_set_template_from_resource (widget_class, "/menu/demo3widget.ui");
|
||
|
|
gtk_widget_class_bind_template_child (widget_class, Demo3Widget, menu);
|
||
|
|
gtk_widget_class_bind_template_callback (widget_class, pressed_cb);
|
||
|
|
|
||
|
|
gtk_widget_class_set_accessible_role (widget_class, GTK_ACCESSIBLE_ROLE_IMG);
|
||
|
|
}
|
||
|
|
|
||
|
|
GtkWidget *
|
||
|
|
demo3_widget_new (const char *resource)
|
||
|
|
{
|
||
|
|
Demo3Widget *self;
|
||
|
|
GdkTexture *texture;
|
||
|
|
|
||
|
|
texture = gdk_texture_new_from_resource (resource);
|
||
|
|
|
||
|
|
self = g_object_new (DEMO3_TYPE_WIDGET,
|
||
|
|
"texture", texture,
|
||
|
|
"has-tooltip", TRUE,
|
||
|
|
NULL);
|
||
|
|
|
||
|
|
g_signal_connect (self, "query-tooltip", G_CALLBACK (query_tooltip), NULL);
|
||
|
|
|
||
|
|
g_object_unref (texture);
|
||
|
|
|
||
|
|
return GTK_WIDGET (self);
|
||
|
|
}
|