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Initial not-so-pretty profile zoom support

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You can press the left mouse-button on the profile and drag the mouse
around to zoom in on a specific area. Releasing the mouse button unzooms.

Yeah, everybody wants rubber-banding, but I have reached the end of my
willingness to fight gtk for more details. Some day.

[Dirk Hohndel:	changed this to use the right mouse button instead of the
		left which seemed just terribly unnatural]

References ticket 9

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Linus Torvalds 2012-11-10 17:25:19 +01:00 • committed by Dirk Hohndel
parent ba5079a489
commit 78ad07c72e
1 changed files with 49 additions and 0 deletions
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49
gtk-gui.c
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@ -1313,6 +1313,8 @@ static gboolean profile_tooltip (GtkWidget *widget, gint x, gint y,
return FALSE; /* don't show tooltip */
}
static int zoom_x = -1, zoom_y = -1;
static gboolean expose_event(GtkWidget *widget, GdkEventExpose *event, gpointer data)
{
struct dive *dive = current_dive;
@ -1332,6 +1334,11 @@ static gboolean expose_event(GtkWidget *widget, GdkEventExpose *event, gpointer
init_profile_background(&gc);
cairo_paint(gc.cr);
if (zoom_x >= 0) {
cairo_translate(gc.cr, -zoom_x, -zoom_y);
cairo_scale(gc.cr, 2.0, 2.0);
}
if (dive) {
if (tooltip_rects) {
free(tooltip_rects);
@ -1345,6 +1352,44 @@ static gboolean expose_event(GtkWidget *widget, GdkEventExpose *event, gpointer
return FALSE;
}
gboolean clicked(GtkWidget *widget, GdkEventButton *event, gpointer user_data)
{
switch (event->button) {
case 3:
zoom_x = event->x;
zoom_y = event->y;
break;
default:
return TRUE;
}
gtk_widget_queue_draw(widget);
return TRUE;
}
gboolean released(GtkWidget *widget, GdkEventButton *event, gpointer user_data)
{
switch (event->button) {
case 3:
zoom_x = zoom_y = -1;
break;
default:
return TRUE;
}
gtk_widget_queue_draw(widget);
return TRUE;
}
gboolean motion(GtkWidget *widget, GdkEventMotion *event, gpointer user_data)
{
if (zoom_x < 0)
return TRUE;
zoom_x = event->x;
zoom_y = event->y;
gtk_widget_queue_draw(widget);
return TRUE;
}
GtkWidget *dive_profile_widget(void)
{
GtkWidget *da;
@ -1352,6 +1397,10 @@ GtkWidget *dive_profile_widget(void)
da = gtk_drawing_area_new();
gtk_widget_set_size_request(da, 350, 250);
g_signal_connect(da, "expose_event", G_CALLBACK(expose_event), NULL);
g_signal_connect(da, "button-press-event", G_CALLBACK(clicked), NULL);
g_signal_connect(da, "button-release-event", G_CALLBACK(released), NULL);
g_signal_connect(da, "motion-notify-event", G_CALLBACK(motion), NULL);
gtk_widget_add_events(da, GDK_BUTTON_PRESS_MASK | GDK_BUTTON_MOTION_MASK | GDK_BUTTON_RELEASE_MASK);
return da;
}