diff options
Diffstat (limited to 'libreport/src/gtk-helpers/autowrapped_label.c')
| -rw-r--r-- | libreport/src/gtk-helpers/autowrapped_label.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/libreport/src/gtk-helpers/autowrapped_label.c b/libreport/src/gtk-helpers/autowrapped_label.c new file mode 100644 index 00000000..981cb709 --- /dev/null +++ b/libreport/src/gtk-helpers/autowrapped_label.c @@ -0,0 +1,107 @@ +/* + Copyright (C) 2011 ABRT Team + Copyright (C) 2011 RedHat inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ +#include <gtk/gtk.h> +#include "libreport.h" + +/* + * GTK doesn't re-wrap GtkLabels which have line wrapping set to true. + * The line wrapped label in VBox looks like this: + * |----------------------------------------| + * |----------------------------------------| + * | word word word word | + * | word word word word | + * | word word | + * |----------------------------------------| + * |----------------------------------------| + * So every project copy-pastes this code to make labels widen + * and shrink horizontally on resize. + */ + +static void rewrap_label_to_parent_size(GtkWidget *widget, + GtkAllocation *allocation, + gpointer data) +{ + GtkLabel *label = GTK_LABEL(widget); + PangoLayout *layout = gtk_label_get_layout(label); + + int lw_old, lh_old; + pango_layout_get_pixel_size(layout, &lw_old, &lh_old); + + /* Already right size? */ + if (lw_old == allocation->width) + return; + + /* Rewrap text to new width */ + pango_layout_set_width(layout, allocation->width * PANGO_SCALE); + + /* Did text height change as a result? */ + int lh; + pango_layout_get_pixel_size(layout, NULL, &lh); + if (lh != lh_old) /* yes, resize label height */ + gtk_widget_set_size_request(widget, -1, lh); +} + +void make_label_autowrap_on_resize(GtkLabel *label) +{ + // So far, only tested to work on labels which were set up as: + //gtk_label_set_justify(label, GTK_JUSTIFY_LEFT); + //gtk_misc_set_alignment(GTK_MISC(label), /*x,yalign:*/ 0.0, 0.0); + // yalign != 0 definitely breaks things! + // also, <property name="ypad">NONZERO</property> would be bad + + /* Makes no sense on non-wrapped labels, so we can as well + * set wrapping to "on" unconditionally, istead of making it a requirement + */ + gtk_label_set_line_wrap(label, TRUE); + g_signal_connect(G_OBJECT(label), "size-allocate", G_CALLBACK(rewrap_label_to_parent_size), NULL); + + // So far, only tested to work on labels which were set up as: + //gtk_box_pack_start(box, label, /*expand*/ false, /*fill*/ false, /*padding*/ 0); +} + +static void fixer(GtkWidget *widget, gpointer data_unused) +{ + if (GTK_IS_CONTAINER(widget)) + { + gtk_container_foreach((GtkContainer*)widget, fixer, NULL); + return; + } + if (GTK_IS_LABEL(widget)) + { + GtkLabel *label = (GtkLabel*)widget; + //const char *txt = gtk_label_get_label(label); + GtkMisc *misc = (GtkMisc*)widget; + gfloat yalign; //= 1; + gint ypad; //= 1; + if (gtk_label_get_line_wrap(label) + && (gtk_misc_get_alignment(misc, NULL, &yalign), yalign == 0) + && (gtk_misc_get_padding(misc, NULL, &ypad), ypad == 0) + ) { + //log("label '%s' set to wrap", txt); + make_label_autowrap_on_resize(label); + return; + } + //log("label '%s' not set to wrap %g %d", txt, yalign, ypad); + } +} + +void fix_all_wrapped_labels(GtkWidget *widget) +{ + fixer(widget, NULL); +} |