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derive from GtkComboBoxEntry. Needs some more work with respect to input

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2008-04-28  Sven Neumann  <sven@gimp.org>

	* app/display/gimpscalecombobox.[ch]: derive from 
GtkComboBoxEntry.
	Needs some more work with respect to input validation and focus
	handling...


svn path=/trunk/; revision=25542
This commit is contained in:
Sven Neumann
2008-04-28 16:41:02 +00:00
committed by Sven Neumann
parent f23d046965
commit 5cc4c6ae3a
3 changed files with 129 additions and 25 deletions
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6
ChangeLog
View File

@ -1,3 +1,9 @@
2008-04-28 Sven Neumann <sven@gimp.org>
* app/display/gimpscalecombobox.[ch]: derive from GtkComboBoxEntry.
Needs some more work with respect to input validation and focus
handling...
2008-04-28 Sven Neumann <sven@gimp.org>
* app/widgets/Makefile.am

142
app/display/gimpscalecombobox.c
View File

@ -21,6 +21,8 @@
#include "config.h"
#include "stdlib.h"
#include <gtk/gtk.h>
#include "libgimpbase/gimpbase.h"
@ -42,12 +44,14 @@ enum
};
static void gimp_scale_combo_box_finalize (GObject *object);
static void gimp_scale_combo_box_finalize (GObject *object);
static void gimp_scale_combo_box_style_set (GtkWidget *widget,
GtkStyle *prev_style);
static void gimp_scale_combo_box_style_set (GtkWidget *widget,
GtkStyle *prev_style);
static void gimp_scale_combo_box_changed (GimpScaleComboBox *combo_box);
static void gimp_scale_combo_box_changed (GimpScaleComboBox *combo_box);
static void gimp_scale_combo_box_entry_activate (GtkEntry *entry,
GimpScaleComboBox *combo_box);
static void gimp_scale_combo_box_scale_iter_set (GtkListStore *store,
GtkTreeIter *iter,
@ -55,7 +59,8 @@ static void gimp_scale_combo_box_scale_iter_set (GtkListStore *store,
gboolean persistent);
G_DEFINE_TYPE (GimpScaleComboBox, gimp_scale_combo_box, GTK_TYPE_COMBO_BOX)
G_DEFINE_TYPE (GimpScaleComboBox, gimp_scale_combo_box,
GTK_TYPE_COMBO_BOX_ENTRY)
#define parent_class gimp_scale_combo_box_parent_class
@ -82,6 +87,7 @@ gimp_scale_combo_box_class_init (GimpScaleComboBoxClass *klass)
static void
gimp_scale_combo_box_init (GimpScaleComboBox *combo_box)
{
GtkWidget *entry;
GtkListStore *store;
GtkCellLayout *layout;
GtkCellRenderer *cell;
@ -98,12 +104,20 @@ gimp_scale_combo_box_init (GimpScaleComboBox *combo_box)
gtk_combo_box_set_model (GTK_COMBO_BOX (combo_box), GTK_TREE_MODEL (store));
g_object_unref (store);
gtk_combo_box_entry_set_text_column (GTK_COMBO_BOX_ENTRY (combo_box), LABEL);
entry = gtk_bin_get_child (GTK_BIN (combo_box));
gtk_entry_set_alignment (GTK_ENTRY (entry), 1.0);
gtk_entry_set_width_chars (GTK_ENTRY (entry), 7);
layout = GTK_CELL_LAYOUT (combo_box);
cell = g_object_new (GTK_TYPE_CELL_RENDERER_TEXT,
"xalign", 1.0,
NULL);
gtk_cell_layout_clear (layout);
gtk_cell_layout_pack_start (layout, cell, TRUE);
gtk_cell_layout_set_attributes (layout, cell,
"text", LABEL,
@ -124,6 +138,10 @@ gimp_scale_combo_box_init (GimpScaleComboBox *combo_box)
g_signal_connect (combo_box, "changed",
G_CALLBACK (gimp_scale_combo_box_changed),
NULL);
g_signal_connect (entry, "activate",
G_CALLBACK (gimp_scale_combo_box_entry_activate),
combo_box);
}
static void
@ -152,27 +170,34 @@ static void
gimp_scale_combo_box_style_set (GtkWidget *widget,
GtkStyle *prev_style)
{
GtkCellLayout *layout;
GtkCellRenderer *cell;
gdouble scale;
GtkWidget *entry;
GtkRcStyle *rc_style;
gint font_size;
gdouble scale;
GTK_WIDGET_CLASS (parent_class)->style_set (widget, prev_style);
gtk_widget_style_get (widget, "label-scale", &scale, NULL);
/* hackedehack ... */
layout = GTK_CELL_LAYOUT (gtk_bin_get_child (GTK_BIN (widget)));
gtk_cell_layout_clear (layout);
entry = gtk_bin_get_child (GTK_BIN (widget));
cell = g_object_new (GTK_TYPE_CELL_RENDERER_TEXT,
"xalign", 1.0,
"scale", scale,
NULL);
rc_style = gtk_widget_get_modifier_style (GTK_WIDGET (entry));
gtk_cell_layout_pack_start (layout, cell, TRUE);
gtk_cell_layout_set_attributes (layout, cell,
"text", LABEL,
NULL);
if (! rc_style->font_desc)
{
PangoContext *context;
PangoFontDescription *font_desc;
context = gtk_widget_get_pango_context (widget);
font_desc = pango_context_get_font_description (context);
rc_style->font_desc = pango_font_description_copy (font_desc);
}
font_size = pango_font_description_get_size (rc_style->font_desc);
pango_font_description_set_size (rc_style->font_desc, scale * font_size);
gtk_widget_modify_style (GTK_WIDGET (entry), rc_style);
}
static void
@ -186,7 +211,7 @@ gimp_scale_combo_box_changed (GimpScaleComboBox *combo_box)
gdouble scale;
gtk_tree_model_get (model, &iter,
SCALE, &scale,
SCALE, &scale,
-1);
if (scale > 0.0)
{
@ -198,6 +223,72 @@ gimp_scale_combo_box_changed (GimpScaleComboBox *combo_box)
}
}
static gboolean
gimp_scale_combo_box_parse_text (const gchar *text,
gdouble *scale)
{
gchar *end;
gdouble left_number;
gdouble right_number;
/* try to parse a number */
left_number = strtod (text, &end);
if (end == text)
return FALSE;
else
text = end;
/* skip over whitespace */
while (g_unichar_isspace (g_utf8_get_char (text)))
text = g_utf8_next_char (text);
if (*text == '%')
{
*scale = left_number / 100.0;
return TRUE;
}
/* check for a valid separator */
if (*text != '/' && *text != ':')
{
*scale = left_number;
return TRUE;
}
text = g_utf8_next_char (text);
/* skip over whitespace */
while (g_unichar_isspace (g_utf8_get_char (text)))
text = g_utf8_next_char (text);
/* try to parse another number */
right_number = strtod (text, &end);
if (end == text)
return FALSE;
if (right_number == 0.0)
return FALSE;
*scale = left_number / right_number;
return TRUE;
}
static void
gimp_scale_combo_box_entry_activate (GtkEntry *entry,
GimpScaleComboBox *combo_box)
{
gdouble scale;
if (gimp_scale_combo_box_parse_text (gtk_entry_get_text (entry), &scale) &&
scale >= 1.0 / 256.0 &&
scale <= 256.0)
{
gimp_scale_combo_box_set_scale (combo_box, scale);
}
}
static void
gimp_scale_combo_box_scale_iter_set (GtkListStore *store,
GtkTreeIter *iter,
@ -206,7 +297,14 @@ gimp_scale_combo_box_scale_iter_set (GtkListStore *store,
{
gchar label[32];
g_snprintf (label, sizeof (label), "%d%%", (gint) ROUND (100.0 * scale));
/* use U+2009 THIN SPACE to seperate the percent sign from the number */
if (scale > 1.0)
g_snprintf (label, sizeof (label),
"%d\342\200\211%%", (gint) ROUND (100.0 * scale));
else
g_snprintf (label, sizeof (label),
"%.3g\342\200\211%%", 100.0 * scale);
gtk_list_store_set (store, iter,
SCALE, scale,
@ -312,7 +410,7 @@ gimp_scale_combo_box_set_scale (GimpScaleComboBox *combo_box,
SCALE, &this,
-1);
if (fabs (this - scale) < 0.01)
if (fabs (this - scale) < 0.0001)
break;
}

6
app/display/gimpscalecombobox.h
View File

@ -22,7 +22,7 @@
#ifndef __GIMP_SCALE_COMBO_BOX_H__
#define __GIMP_SCALE_COMBO_BOX_H__
#include <gtk/gtkcombobox.h>
#include <gtk/gtkcomboboxentry.h>
#define GIMP_TYPE_SCALE_COMBO_BOX (gimp_scale_combo_box_get_type ())
@ -37,12 +37,12 @@ typedef struct _GimpScaleComboBoxClass GimpScaleComboBoxClass;
struct _GimpScaleComboBoxClass
{
GtkComboBoxClass parent_instance;
GtkComboBoxEntryClass parent_instance;
};
struct _GimpScaleComboBox
{
GtkComboBox parent_instance;
GtkComboBoxEntry parent_instance;
GtkTreePath *last_path;
GList *mru;