362 lines
12 KiB
C
362 lines
12 KiB
C
/***************************************************************************
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cellrendererspin.c
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------------------
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begin : Tue Oct 21 2003
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copyright : (C) 2003 by Tim-Philipp Müller
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email : t.i.m at orange dot net
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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/*
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*
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* This is a dirty 15-minute hack that tries to
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* make editable cells with spin buttons instead
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* of the text entry widget.
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*
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* Modify how you please. At the moment you need
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* to hook up your own cell data function to make
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* sure that the number of digits is the same in
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* editing mode as it is in non-editing mode.
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*
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* The parameters passed to _new() should probably
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* be properties, and probably we don't need most
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* of them anyway. Also, it would be good if there
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* was a better method to ensure that the number
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* of digits is the same without this.
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*
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* Maybe one should just rip out the whole _render
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* stuff from GtkCellRendererText and make a
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* whole new specialised GtkCellRenderFloat
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* or something.
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*
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* If anyone ever completes this code to sth useful,
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* or achieves sth similar in another way, or has
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* any comments on it, please drop me a mail.
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*/
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#include "cellrendererspin.h"
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#include <gtk/gtkadjustment.h>
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#include <gtk/gtkspinbutton.h>
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#include <stdlib.h>
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#define GUI_CELL_RENDERER_SPIN_PATH "gui-cell-renderer-spin-path"
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#define GUI_CELL_RENDERER_SPIN_INFO "gui-cell-renderer-spin-info"
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/* Some boring function declarations: GObject type system stuff */
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static void gui_cell_renderer_spin_init (GuiCellRendererSpin *cellspin);
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static void gui_cell_renderer_spin_class_init (GuiCellRendererSpinClass *klass);
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static void gui_cell_renderer_spin_finalize (GObject *gobject);
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static gpointer parent_class;
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static GtkCellEditable *gui_cell_renderer_spin_start_editing (GtkCellRenderer *cell,
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GdkEvent *event,
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GtkWidget *widget,
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const gchar *path,
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GdkRectangle *background_area,
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GdkRectangle *cell_area,
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GtkCellRendererState flags);
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struct _GCRSpinInfo
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{
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gulong focus_out_id;
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};
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typedef struct _GCRSpinInfo GCRSpinInfo;
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/***************************************************************************
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*
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* gui_cell_renderer_spin_get_type
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*
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* Here we register our type with the GObject type system if we
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* haven't done so yet. Everything else is done in the callbacks.
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*
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***************************************************************************/
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GType
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gui_cell_renderer_spin_get_type (void)
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{
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static GType cell_spin_type = 0;
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if (cell_spin_type)
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return cell_spin_type;
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if (1)
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{
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static const GTypeInfo cell_spin_info =
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{
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sizeof (GuiCellRendererSpinClass),
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NULL, /* base_init */
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NULL, /* base_finalize */
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(GClassInitFunc) gui_cell_renderer_spin_class_init,
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NULL, /* class_finalize */
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NULL, /* class_data */
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sizeof (GuiCellRendererSpin),
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0, /* n_preallocs */
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(GInstanceInitFunc) gui_cell_renderer_spin_init,
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};
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/* Derive from GtkCellRenderer */
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cell_spin_type = g_type_register_static (GTK_TYPE_CELL_RENDERER_TEXT,
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"GuiCellRendererSpin",
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&cell_spin_info,
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0);
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}
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return cell_spin_type;
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}
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/***************************************************************************
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*
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* gui_cell_renderer_spin_init
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*
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* Set some default properties of the parent (GtkCellRendererText).
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*
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***************************************************************************/
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static void
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gui_cell_renderer_spin_init (GuiCellRendererSpin *cellrendererspin)
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{
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return;
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}
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/***************************************************************************
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*
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* gui_cell_renderer_spin_class_init:
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*
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***************************************************************************/
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static void
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gui_cell_renderer_spin_class_init (GuiCellRendererSpinClass *klass)
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{
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GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS(klass);
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GObjectClass *object_class = G_OBJECT_CLASS(klass);
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parent_class = g_type_class_peek_parent (klass);
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object_class->finalize = gui_cell_renderer_spin_finalize;
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/* Override the cell renderer's edit-related methods */
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cell_class->start_editing = gui_cell_renderer_spin_start_editing;
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}
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/***************************************************************************
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*
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* gui_cell_renderer_spin_finalize: free any resources here
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*
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***************************************************************************/
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static void
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gui_cell_renderer_spin_finalize (GObject *object)
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{
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/*
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GuiCellRendererSpin *cellrendererspin = GUI_CELL_RENDERER_SPIN(object);
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*/
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/* Free any dynamically allocated resources here */
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/* chain up to parent class to make sure
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* they release all their memory as well */
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(* G_OBJECT_CLASS (parent_class)->finalize) (object);
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}
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/***************************************************************************
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*
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* gui_cell_renderer_spin_new
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*
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* return a new cell renderer instance
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* (all the parameters should really be properties)
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*
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* Not sure which of all these values are really
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* relevant for the spin button - needs checking!
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*
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***************************************************************************/
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GtkCellRenderer *
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gui_cell_renderer_spin_new (gdouble lower,
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gdouble upper,
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gdouble step_inc,
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gdouble page_inc,
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gdouble page_size,
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gdouble climb_rate,
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guint digits)
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{
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GtkCellRenderer *cell;
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GuiCellRendererSpin *spincell;
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cell = g_object_new(GUI_TYPE_CELL_RENDERER_SPIN, NULL);
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spincell = GUI_CELL_RENDERER_SPIN(cell);
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spincell->lower = lower;
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spincell->upper = upper;
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spincell->step_inc = step_inc;
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spincell->page_inc = page_inc;
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spincell->page_size = page_size;
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spincell->climb_rate = climb_rate;
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spincell->digits = digits;
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return cell;
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}
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/***************************************************************************
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*
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* gui_cell_renderer_spin_editing_done
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*
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***************************************************************************/
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static void
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gui_cell_renderer_spin_editing_done (GtkCellEditable *spinbutton,
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gpointer data)
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{
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const gchar *path;
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const gchar *new_text;
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GCRSpinInfo *info;
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info = g_object_get_data (G_OBJECT (data), GUI_CELL_RENDERER_SPIN_INFO);
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if (info->focus_out_id > 0)
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{
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g_signal_handler_disconnect (spinbutton, info->focus_out_id);
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info->focus_out_id = 0;
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}
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if (GTK_ENTRY(spinbutton)->editing_canceled)
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return;
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path = g_object_get_data (G_OBJECT (spinbutton), GUI_CELL_RENDERER_SPIN_PATH);
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new_text = gtk_entry_get_text (GTK_ENTRY(spinbutton));
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g_signal_emit_by_name(data, "edited", path, new_text);
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}
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/***************************************************************************
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*
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* gui_cell_renderer_spin_focus_out_event
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*
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***************************************************************************/
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static gboolean
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gui_cell_renderer_spin_focus_out_event (GtkWidget *spinbutton,
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GdkEvent *event,
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gpointer data)
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{
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gui_cell_renderer_spin_editing_done (GTK_CELL_EDITABLE (spinbutton), data);
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/* entry needs focus-out-event */
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return FALSE;
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}
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/***************************************************************************
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*
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* gui_cell_renderer_spin_start_editing
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*
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***************************************************************************/
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static gboolean
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onButtonPress (GtkWidget *spinbutton, GdkEventButton *bevent, gpointer data)
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{
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if (bevent->button == 1 && bevent->type == GDK_2BUTTON_PRESS || bevent->type == GDK_3BUTTON_PRESS)
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{
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g_print ("double or triple click caught and ignored.\n");
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return TRUE; /* don't invoke other handlers */
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}
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return FALSE;
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}
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/***************************************************************************
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*
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* gui_cell_renderer_spin_start_editing
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*
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***************************************************************************/
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static GtkCellEditable *
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gui_cell_renderer_spin_start_editing (GtkCellRenderer *cell,
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GdkEvent *event,
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GtkWidget *widget,
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const gchar *path,
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GdkRectangle *background_area,
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GdkRectangle *cell_area,
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GtkCellRendererState flags)
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{
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GtkCellRendererText *celltext;
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GuiCellRendererSpin *spincell;
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GtkAdjustment *adj;
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GtkWidget *spinbutton;
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GCRSpinInfo *info;
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gdouble curval = 0.0;
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celltext = GTK_CELL_RENDERER_TEXT(cell);
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spincell = GUI_CELL_RENDERER_SPIN(cell);
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/* If the cell isn't editable we return NULL. */
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if (celltext->editable == FALSE)
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return NULL;
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spinbutton = g_object_new (GTK_TYPE_SPIN_BUTTON, "has_frame", FALSE, "numeric", TRUE, NULL);
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/* dirty */
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if (celltext->text)
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curval = atof(celltext->text);
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adj = GTK_ADJUSTMENT(gtk_adjustment_new(curval,
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spincell->lower,
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spincell->upper,
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spincell->step_inc,
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spincell->page_inc,
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spincell->page_size));
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gtk_spin_button_configure(GTK_SPIN_BUTTON(spinbutton), adj, spincell->climb_rate, spincell->digits);
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g_object_set_data_full (G_OBJECT(spinbutton), GUI_CELL_RENDERER_SPIN_PATH, g_strdup (path), g_free);
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gtk_editable_select_region (GTK_EDITABLE (spinbutton), 0, -1);
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gtk_widget_show (spinbutton);
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g_signal_connect (spinbutton, "editing_done",
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G_CALLBACK (gui_cell_renderer_spin_editing_done),
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celltext);
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/* hack trying to catch the quite annoying effect
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* a double click has while editing */
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g_signal_connect (spinbutton, "button_press_event",
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G_CALLBACK (onButtonPress),
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NULL);
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info = g_new0(GCRSpinInfo, 1);
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info->focus_out_id = g_signal_connect (spinbutton, "focus_out_event",
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G_CALLBACK (gui_cell_renderer_spin_focus_out_event),
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celltext);
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g_object_set_data_full (G_OBJECT (cell), GUI_CELL_RENDERER_SPIN_INFO, info, g_free);
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return GTK_CELL_EDITABLE (spinbutton);
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}
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