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eeshow/gui.c: add zoom in/out with + (or =) and -

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This commit is contained in:
Werner Almesberger 2016-08-03 10:05:01 -03:00
parent c8b8dbd174
commit 2775b5cb8d
1 changed files with 17 additions and 1 deletions
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18
eeshow/gui.c
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@ -35,6 +35,9 @@ struct gui_ctx {
int w, h;
int xmin, ymin;
int curr_x; /* last on-screen mouse position */
int curr_y;
unsigned zoom; /* scale by 1.0 / (1 << zoom) */
int x, y; /* center, in eeschema coordinates */
@ -167,6 +170,9 @@ static gboolean motion_notify_event(GtkWidget *widget, GdkEventMotion *event,
struct gui_ctx *ctx = data;
int x, y;
ctx->curr_x = event->x;
ctx->curr_y = event->y;
canvas_coord(ctx, event->x, event->y, &x, &y);
// fprintf(stderr, "motion\n");
pan_update(ctx, event->x, event->y);
@ -219,8 +225,18 @@ static gboolean button_release_event(GtkWidget *widget, GdkEventButton *event,
static gboolean key_press_event(GtkWidget *widget, GdkEventKey *event,
gpointer data)
{
fprintf(stderr, "key %d\n", event->keyval);
struct gui_ctx *ctx = data;
int x, y;
canvas_coord(ctx, ctx->curr_x, ctx->curr_y, &x, &y);
switch (event->keyval) {
case '+':
case '=':
zoom_in(ctx, x, y);
break;
case '-':
zoom_out(ctx, x, y);
break;
case GDK_KEY_q:
gtk_main_quit();
}