static gint gtk_hruler_motion_notify (GtkWidget *widget, GdkEventMotion *event) { GtkRuler *ruler; gint x; g_return_val_if_fail (widget != NULL, FALSE); g_return_val_if_fail (GTK_IS_HRULER (widget), FALSE); g_return_val_if_fail (event != NULL, FALSE); ruler = GTK_RULER (widget); if (event->is_hint) gdk_window_get_pointer (widget->window, &x, NULL, NULL); else x = event->x; ruler->position = ruler->lower + ((ruler->upper - ruler->lower) * x) / widget->allocation.width; /* Make sure the ruler has been allocated already */ if (ruler->backing_store != NULL) gtk_ruler_draw_pos (ruler); return FALSE; }
static void gtk_hruler_draw_pos (GtkRuler *ruler) { GtkWidget *widget; GdkGC *gc; int i; gint x, y; gint width, height; gint bs_width, bs_height; gint xthickness; gint ythickness; gfloat increment; g_return_if_fail (ruler != NULL); g_return_if_fail (GTK_IS_HRULER (ruler)); if (GTK_WIDGET_DRAWABLE (ruler)) { widget = GTK_WIDGET (ruler); gc = widget->style->fg_gc[GTK_STATE_NORMAL]; xthickness = widget->style->klass->xthickness; ythickness = widget->style->klass->ythickness; width = widget->allocation.width; height = widget->allocation.height - ythickness * 2; bs_width = height / 2; bs_width |= 1; /* make sure it's odd */ bs_height = bs_width / 2 + 1; if ((bs_width > 0) && (bs_height > 0)) { /* If a backing store exists, restore the ruler */ if (ruler->backing_store && ruler->non_gr_exp_gc) gdk_draw_pixmap (ruler->widget.window, ruler->non_gr_exp_gc, ruler->backing_store, ruler->xsrc, ruler->ysrc, ruler->xsrc, ruler->ysrc, bs_width, bs_height); increment = (gfloat) width / (ruler->upper - ruler->lower); x = ROUND ((ruler->position - ruler->lower) * increment) + (xthickness - bs_width) / 2 - 1; y = (height + bs_height) / 2 + ythickness; for (i = 0; i < bs_height; i++) gdk_draw_line (widget->window, gc, x + i, y + i, x + bs_width - 1 - i, y + i); ruler->xsrc = x; ruler->ysrc = y; } } }
static void gtk_shruler_draw_ticks(GtkRuler *ruler) { GtkWidget *widget; GdkGC *gc, *bg_gc; gint i; gint width, height; gint xthickness; gint ythickness; gint pos; g_return_if_fail (ruler != NULL); g_return_if_fail (GTK_IS_HRULER (ruler)); if (!GTK_WIDGET_DRAWABLE (ruler)) return; widget = GTK_WIDGET (ruler); gc = widget->style->fg_gc[GTK_STATE_NORMAL]; bg_gc = widget->style->bg_gc[GTK_STATE_NORMAL]; xthickness = widget->style->xthickness; ythickness = widget->style->ythickness; width = widget->allocation.width; height = widget->allocation.height - ythickness * 2; gtk_paint_box (widget->style, ruler->backing_store, GTK_STATE_NORMAL, GTK_SHADOW_OUT, NULL, widget, "hruler", 0, 0, widget->allocation.width, widget->allocation.height); #if 0 gdk_draw_line (ruler->backing_store, gc, xthickness, height + ythickness, widget->allocation.width - xthickness, height + ythickness); #endif /* assume ruler->max_size has the char width */ /* i is increment of char_width, pos is label number * y position is based on height of widget itself */ for ( pos = GTK_SHRULER(ruler)->start_pos, i = 0; pos < widget->allocation.width - xthickness; pos += ruler->max_size, i++ ) { gint length = height / 8; if ( i % 10 == 0 ) length = ( 2 * height / 3 ); else if ( i % 5 == 0 ) length = ( height / 3 ); gdk_draw_line(ruler->backing_store, gc, pos, height + ythickness, pos, height - length); if ( i % 10 == 0 ) { gchar buf[8]; PangoLayout *layout; /* draw label */ g_snprintf(buf, sizeof buf, "%d", i); layout = gtk_widget_create_pango_layout (GTK_WIDGET(ruler), buf); gdk_draw_layout(ruler->backing_store, gc, pos + 2, 0, layout); g_object_unref(layout); } } }
static void gtk_hruler_draw_ticks (GtkRuler *ruler) { GtkWidget *widget; GdkGC *gc, *bg_gc; GdkFont *font; gint i; gint width, height; gint xthickness; gint ythickness; gint length, ideal_length; gfloat lower, upper; /* Upper and lower limits, in ruler units */ gfloat increment; /* Number of pixels per unit */ gint scale; /* Number of units per major unit */ gfloat subd_incr; gfloat start, end, cur; gchar unit_str[32]; gint digit_height; gint text_width; gint pos; g_return_if_fail (ruler != NULL); g_return_if_fail (GTK_IS_HRULER (ruler)); if (!GTK_WIDGET_DRAWABLE (ruler)) return; widget = GTK_WIDGET (ruler); gc = widget->style->fg_gc[GTK_STATE_NORMAL]; bg_gc = widget->style->bg_gc[GTK_STATE_NORMAL]; font = widget->style->font; xthickness = widget->style->klass->xthickness; ythickness = widget->style->klass->ythickness; digit_height = font->ascent; /* assume descent == 0 ? */ width = widget->allocation.width; height = widget->allocation.height - ythickness * 2; gtk_paint_box (widget->style, ruler->backing_store, GTK_STATE_NORMAL, GTK_SHADOW_OUT, NULL, widget, "hruler", 0, 0, widget->allocation.width, widget->allocation.height); gdk_draw_line (ruler->backing_store, gc, xthickness, height + ythickness, widget->allocation.width - xthickness, height + ythickness); upper = ruler->upper / ruler->metric->pixels_per_unit; lower = ruler->lower / ruler->metric->pixels_per_unit; if ((upper - lower) == 0) return; increment = (gfloat) width / (upper - lower); /* determine the scale * We calculate the text size as for the vruler instead of using * text_width = gdk_string_width(font, unit_str), so that the result * for the scale looks consistent with an accompanying vruler */ scale = ceil (ruler->max_size / ruler->metric->pixels_per_unit); sprintf (unit_str, "%d", scale); text_width = strlen (unit_str) * digit_height + 1; for (scale = 0; scale < MAXIMUM_SCALES; scale++) if (ruler->metric->ruler_scale[scale] * fabs(increment) > 2 * text_width) break; if (scale == MAXIMUM_SCALES) scale = MAXIMUM_SCALES - 1; /* drawing starts here */ length = 0; for (i = MAXIMUM_SUBDIVIDE - 1; i >= 0; i--) { subd_incr = (gfloat) ruler->metric->ruler_scale[scale] / (gfloat) ruler->metric->subdivide[i]; if (subd_incr * fabs(increment) <= MINIMUM_INCR) continue; /* Calculate the length of the tickmarks. Make sure that * this length increases for each set of ticks */ ideal_length = height / (i + 1) - 1; if (ideal_length > ++length) length = ideal_length; if (lower < upper) { start = floor (lower / subd_incr) * subd_incr; end = ceil (upper / subd_incr) * subd_incr; } else { start = floor (upper / subd_incr) * subd_incr; end = ceil (lower / subd_incr) * subd_incr; } for (cur = start; cur <= end; cur += subd_incr) { pos = ROUND ((cur - lower) * increment); gdk_draw_line (ruler->backing_store, gc, pos, height + ythickness, pos, height - length + ythickness); /* draw label */ if (i == 0) { sprintf (unit_str, "%d", (int) cur); gdk_draw_string (ruler->backing_store, font, gc, pos + 2, ythickness + font->ascent - 1, unit_str); } } } }