path: root/widgets/table/e-cell-spin-button.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * e-cell-spin-button.c: Spin button item for e-table.
 * Copyright 2001, CodeFactory AB
 * Copyright 2001, Mikael Hallendal <micke@codefactory.se>
 *
 * Authors:
 *   Mikael Hallendal <micke@codefactory.se>
 *
 * Celltype for drawing a spinbutton in a cell. 
 *
 * Used ECellPopup by Damon Chaplin <damon@ximian.com> as base for 
 * buttondrawings.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License, version 2, as published by the Free Software Foundation.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <gtk/gtksignal.h>
#include <gal/e-table/e-table-item.h>
#include <gal/e-table/e-table-model.h>
#include <gal/e-table/e-cell-float.h>
#include <gal/e-table/e-cell-number.h>
#include <gal/util/e-util.h>
#include "e-cell-spin-button.h"

#define E_CELL_SPIN_BUTTON_ARROW_WIDTH  16
#define PARENT_TYPE e_cell_get_type ()

static void e_cell_spin_button_class_init   (GObjectClass   *klass);
static void e_cell_spin_button_init         (GtkObject        *object);

static void         ecsb_dispose      (GObject  *object);

/* ECell Functions */
static ECellView *  ecsb_new_view     (ECell                 *ecell,
                       ETableModel           *etm,
                       void                  *eti_view);
static void         ecsb_realize      (ECellView             *ecv);
static void         ecsb_kill_view    (ECellView             *ecv);
static void         ecsb_unrealize    (ECellView             *ecv);
static void         ecsb_draw         (ECellView             *ecv, 
                       GdkDrawable           *drawable, 
                       int                    model_col, 
                       int                    view_col, 
                       int                    row, 
                       ECellFlags             flags, 
                       int                    x1, 
                       int                    y1, 
                       int                    x2, 
                       int                    y2); 

static gint         ecsb_event        (ECellView             *ecv, 
                       GdkEvent              *event, 
                       int                    model_col, 
                       int                    view_col, 
                       int                    row,
                       ECellFlags             flags, 
                       ECellActions          *actions); 

static gint         ecsb_height       (ECellView             *ecv,
                       int                    model_col,
                       int                    view_col,
                       int                    row);

static void *       ecsb_enter_edit   (ECellView             *ecv,
                       int                    model_col, 
                       int                    view_col, 
                       int                    row);

static void         ecsb_leave_edit   (ECellView             *ecv,
                       int                    model_col, 
                       int                    view_col, 
                       int                    row, 
                       void                  *context);
static void         ecsb_focus        (ECellView             *ecell_view,
                       int                    model_col,
                       int                    view_col,
                       int                    row,
                       int                    x1,
                       int                    y1,
                       int                    x2,
                       int                    y2);
static void         ecsb_unfocus      (ECellView             *ecell_view);

static void         ecsb_show_tooltip (ECellView             *ecv,
                       int                    model_col, 
                       int                    view_col, 
                       int                    row, 
                       int                    col_width, 
                       ETableTooltip          *tooltip);

typedef struct {
    ECellView    cell_view;
    
    ECellView   *child_view;
} ECellSpinButtonView;

enum {
    STEP,
    LAST_SIGNAL
};

static guint    signals[LAST_SIGNAL] = { 0 };
static ECell   *parent_class;

static void 
e_cell_spin_button_class_init     (GObjectClass   *klass)
{
        ECellClass             *ecc    = (ECellClass *) klass;  
    ECellSpinButtonClass   *ecsbc  = (ECellSpinButtonClass *) klass;
        
        klass->dispose     = ecsb_dispose;

    ecc->realize       = ecsb_realize;
    ecc->unrealize     = ecsb_unrealize;
    ecc->new_view      = ecsb_new_view;
    ecc->kill_view     = ecsb_kill_view;
    ecc->draw          = ecsb_draw;
    ecc->event         = ecsb_event;
    ecc->height        = ecsb_height;
    ecc->enter_edit    = ecsb_enter_edit;
    ecc->leave_edit    = ecsb_leave_edit;
    ecc->focus         = ecsb_focus;
    ecc->unfocus       = ecsb_unfocus;  ecc->print         = NULL;
    ecc->print_height  = NULL;
    ecc->max_width     = NULL;
    ecc->show_tooltip  = ecsb_show_tooltip;

    ecsbc->step        = NULL;

        parent_class       = g_type_class_ref (E_CELL_TYPE);

    signals[STEP] =
        g_signal_new ("step",
                  G_OBJECT_CLASS_TYPE (klass),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (ECellSpinButtonClass, step),
                  NULL, NULL,
                  e_marshal_NONE__POINTER_INT_INT_INT,
                  G_TYPE_NONE,
                  4, G_TYPE_POINTER, G_TYPE_INT, 
                  G_TYPE_INT, G_TYPE_INT);
}

static void 
e_cell_spin_button_init           (GtkObject        *object)
{
        ECellSpinButton   *ecsb;
    
    g_return_if_fail (object != NULL);
    g_return_if_fail (M_IS_CELL_SPIN_BUTTON (object));
    
    ecsb = E_CELL_SPIN_BUTTON (object);

    ecsb->up_pressed    = FALSE;
    ecsb->down_pressed  = FALSE;
}

static ECellView *  
ecsb_new_view     (ECell            *ecell,
           ETableModel      *etm,
           void             *eti_view)
{
    ECellSpinButton       *ecsb = E_CELL_SPIN_BUTTON (ecell);
    ECellSpinButtonView   *ecsb_view;

    g_return_val_if_fail (ecsb->child != NULL, NULL);

    ecsb_view = g_new0 (ECellSpinButtonView, 1);

    ecsb_view->cell_view.ecell = ecell;
    ecsb_view->cell_view.e_table_model = etm;
    ecsb_view->cell_view.e_table_item_view = eti_view;

    ecsb_view->child_view = e_cell_new_view (ecsb->child, etm, eti_view);

    return (ECellView *) ecsb_view;
}

static void         
ecsb_realize      (ECellView        *ecv)
{ 
    ECellSpinButtonView   *ecsb_view;
    
    g_return_if_fail (ecv != NULL);

    ecsb_view = (ECellSpinButtonView *) ecv;

    e_cell_realize (ecsb_view->child_view);
} 

static void         
ecsb_kill_view    (ECellView        *ecv)
{
    ECellSpinButtonView   *ecsb_view;
    
    g_return_if_fail (ecv != NULL);

    ecsb_view = (ECellSpinButtonView *) ecv;

    if (ecsb_view->child_view) {
        e_cell_kill_view (ecsb_view->child_view);
    }
    
    g_free (ecsb_view);
}

static void         
ecsb_unrealize    (ECellView        *ecv)
{ 
    ECellSpinButtonView   *ecsb_view;
    
    g_return_if_fail (ecv != NULL);

    ecsb_view = (ECellSpinButtonView *) ecv;

    e_cell_unrealize (ecsb_view->child_view);
}

static void         
ecsb_draw         (ECellView        *ecv, 
           GdkDrawable      *drawable, 
           int               model_col, 
           int               view_col, 
           int               row, 
           ECellFlags        flags, 
           int               x1, 
           int               y1, 
           int               x2, 
           int               y2)
{
    ECellSpinButton        *ecsb;
    ECellSpinButtonView    *ecsb_view;
    ETableItem             *eti;
    GtkWidget              *canvas;
    GtkShadowType           shadow = GTK_SHADOW_OUT;
    GdkRectangle            rect;
    
    g_return_if_fail (ecv != NULL);
    
    ecsb_view   = (ECellSpinButtonView *) ecv;
    ecsb        = E_CELL_SPIN_BUTTON (ecsb_view->cell_view.ecell);
    
    eti         = E_TABLE_ITEM (ecsb_view->cell_view.e_table_item_view);
    canvas      = GTK_WIDGET (GNOME_CANVAS_ITEM (eti)->canvas);
    
    if (eti->editing_col == view_col && 
        eti->editing_row == row) {

        /* Draw child (Whats shown under the buttons) */
        e_cell_draw (ecsb_view->child_view, 
                 drawable, model_col, view_col,
                 row, flags, 
                 x1, y1, 
                 x2 - E_CELL_SPIN_BUTTON_ARROW_WIDTH, y2); 

        /* Draw down-arrow */
        rect.x       = x2 - E_CELL_SPIN_BUTTON_ARROW_WIDTH;
        rect.y       = y1 + (y2 - y1) / 2;
        rect.width   = E_CELL_SPIN_BUTTON_ARROW_WIDTH;
        rect.height  = (y2 - y1) / 2;
        
        if (ecsb->down_pressed) {
            shadow = GTK_SHADOW_IN;
        } else {
            shadow = GTK_SHADOW_OUT;
        }
        
        gtk_paint_box (canvas->style, drawable, 
                   GTK_STATE_NORMAL, shadow,
                   &rect, canvas, "ecellspinbutton_down",
                   rect.x, rect.y, rect.width, rect.height);

        gtk_paint_arrow (canvas->style, drawable,
                 GTK_STATE_NORMAL, GTK_SHADOW_NONE,
                 &rect, canvas, NULL,
                 GTK_ARROW_DOWN, TRUE,
                 rect.x,
                 rect.y,
                 rect.width,
                 rect.height);

        /* Draw up-arrow */
        rect.y       = y1;
        
        if (ecsb->up_pressed) {
            shadow = GTK_SHADOW_IN;
        } else {
            shadow = GTK_SHADOW_OUT;
        }

        gtk_paint_box (canvas->style, drawable, 
                   GTK_STATE_NORMAL, shadow,
                   &rect, canvas, "ecellspinbutton_up",
                   rect.x, rect.y, rect.width, rect.height);

        gtk_paint_arrow (canvas->style, drawable,
                 GTK_STATE_NORMAL, GTK_SHADOW_NONE,
                 &rect, canvas, NULL,
                 GTK_ARROW_UP, TRUE,
                 rect.x,
                 rect.y,
                 rect.width,
                 rect.height);
    } else {
        /* Draw child */
        e_cell_draw (ecsb_view->child_view, 
                 drawable, model_col, view_col,
                 row, flags, 
                 x1, y1, 
                 x2, y2); 
    }
}

static gint         
ecsb_event        (ECellView        *ecv, 
           GdkEvent         *event, 
           int               model_col, 
           int               view_col, 
           int               row,
           ECellFlags        flags, 
           ECellActions     *actions)
{
    ECellSpinButton       *ecsb;
    ECellSpinButtonClass  *ecsb_class;
    ECellSpinButtonView   *ecsb_view;
    ETableItem            *eti;
    gint                   height, width;
    
    g_return_val_if_fail (ecv != NULL, FALSE);
        
    ecsb_view   = (ECellSpinButtonView *) ecv;
    ecsb        = E_CELL_SPIN_BUTTON (ecsb_view->cell_view.ecell);
    ecsb_class  = E_CELL_SPIN_BUTTON_CLASS (GTK_OBJECT_GET_CLASS (ecsb));
    eti         = E_TABLE_ITEM (ecsb_view->cell_view.e_table_item_view);
    
    switch (event->type) {
    case GDK_BUTTON_PRESS:
        if (eti->editing_col == view_col &&
            eti->editing_row == row) {
            width = e_table_header_col_diff (eti->header,
                             view_col,
                             view_col + 1);
            height = e_table_item_row_diff (eti, row, row + 1);

            /* Check if inside a button */
            if (event->button.x >= width - E_CELL_SPIN_BUTTON_ARROW_WIDTH) {
                /* Yep, which one? */
                if (event->button.y <= height / 2) {
                    ecsb->up_pressed = TRUE;
                    g_signal_emit (ecsb,
                               signals[STEP], 0,
                               ecv,
                               STEP_UP,
                               view_col,
                               row);
                } else {
                    ecsb->down_pressed = TRUE;
                    g_signal_emit (ecsb,
                               signals[STEP], 0,
                               ecv,
                               STEP_DOWN,
                               view_col,
                               row);
                }

                e_table_item_redraw_range (eti,
                               view_col,
                               row,
                               view_col,
                               row);
                
            }
        } 
        
        break;
    case GDK_BUTTON_RELEASE:
        ecsb->up_pressed = FALSE;
        ecsb->down_pressed = FALSE;
        e_table_item_redraw_range (eti,
                       view_col,
                       row,
                       view_col,
                       row);
        break;
    case GDK_KEY_PRESS:
        break;
    default:
        break;
    }

    return e_cell_event (ecsb_view->child_view, event, model_col,
                 view_col, row, flags, actions);
}

static gint         
ecsb_height       (ECellView        *ecv,
           int               model_col,
           int               view_col,
           int               row)
{
    ECellSpinButtonView   *ecsb_view;
    
    g_return_val_if_fail (ecv != NULL, -1);
    
    ecsb_view = (ECellSpinButtonView *) ecv;

    return e_cell_height (ecsb_view->child_view, model_col, view_col, row);
}

static void *       
ecsb_enter_edit   (ECellView        *ecv,
           int               model_col, 
           int               view_col, 
           int               row)
{
    ECellSpinButtonView   *ecsb_view;
    
    g_return_val_if_fail (ecv != NULL, NULL);

    ecsb_view = (ECellSpinButtonView *) ecv;

    return e_cell_enter_edit (ecsb_view->child_view, model_col,
                  view_col, row);
}


static void         
ecsb_leave_edit   (ECellView        *ecv,
           int               model_col, 
           int               view_col, 
           int               row, 
           void             *context)
{
    ECellSpinButtonView   *ecsb_view;
    
    g_return_if_fail (ecv != NULL);
    
    ecsb_view = (ECellSpinButtonView *) ecv;

    e_cell_leave_edit (ecsb_view->child_view, model_col, view_col, 
               row, context);
}

static void
ecsb_focus        (ECellView        *ecell_view,
           int               model_col,
           int               view_col,
           int               row,
           int           x1,
           int           y1,
           int           x2,
           int           y2)
{
    ECellClass  *klass;
    ECellSpinButtonView   *ecsb_view;
    
    ecsb_view = (ECellSpinButtonView *) ecell_view;

    klass = E_CELL_GET_CLASS (ecell_view->ecell);

    if (klass->focus)
        klass->focus (ecell_view, model_col, view_col, row, 
                  x1, y1, x2, y2);
}

static void
ecsb_unfocus      (ECellView        *ecell_view)
{
    ECellClass  *klass;
    ECellSpinButtonView   *ecsb_view;
    
    ecsb_view = (ECellSpinButtonView *) ecell_view;
    klass = E_CELL_GET_CLASS (ecell_view->ecell);

    if (klass->unfocus)
        klass->unfocus (ecell_view);
}

static void         
ecsb_show_tooltip (ECellView        *ecv,
           int               model_col, 
           int               view_col, 
           int               row, 
           int               col_width, 
           ETableTooltip    *tooltip)
{
    ECellSpinButtonView   *ecsb_view;
    
    g_return_if_fail (ecv != NULL);

    ecsb_view = (ECellSpinButtonView *) ecv;
    
    e_cell_show_tooltip (ecsb_view->child_view, model_col, view_col, 
                 row, col_width, tooltip);
}

static void 
ecsb_dispose (GObject   *object)
{
    ECellSpinButton *mcsp;

    g_return_if_fail (object != NULL);
    g_return_if_fail (M_IS_CELL_SPIN_BUTTON (object));
    
    mcsp = E_CELL_SPIN_BUTTON (object);
    
    G_OBJECT_CLASS (parent_class)->dispose (object);
}

ECell *
e_cell_spin_button_new (gint     min,
            gint     max,
            gint     step,
            ECell   *child_cell)
{
    ECellSpinButton   *ecsb;
    
    ecsb = g_object_new (E_CELL_SPIN_BUTTON_TYPE, NULL);

    if (!child_cell) {
        child_cell = e_cell_number_new (NULL, 
                        GTK_JUSTIFY_LEFT);
        
        g_signal_connect (ecsb, "step",
                  G_CALLBACK (e_cell_spin_button_step),
                  NULL);
    }
    
    ecsb->child   = child_cell;
    ecsb->min.i   = min;
    ecsb->max.i   = max;
    ecsb->step.i  = step;

    return E_CELL (ecsb);
}

ECell *
e_cell_spin_button_new_float (gfloat    min,
                  gfloat    max,
                  gfloat    step,
                  ECell    *child_cell)
{
    ECellSpinButton   *ecsb;
    
    ecsb = g_object_new (E_CELL_SPIN_BUTTON_TYPE, NULL);

    if (!child_cell) {
        child_cell = e_cell_float_new (NULL, GTK_JUSTIFY_LEFT);
        g_signal_connect (ecsb, "step",
                  G_CALLBACK (e_cell_spin_button_step_float),
                  NULL);
    }
    
    ecsb->child   = child_cell;
    ecsb->min.f   = min;
    ecsb->max.f   = max;
    ecsb->step.f  = step;

    return E_CELL (ecsb);
}

void
e_cell_spin_button_step   (ECellSpinButton       *ecsb,
               ECellView             *ecv,
               ECellSpinButtonStep    direction,
               gint                   col,
               gint                   row)
{
    ECellSpinButtonView   *ecsb_view; 
    
    ETableModel           *etm;
    gint                   value;
    gint                   new_value;
    gchar                 *str_value;
    
    g_return_if_fail (ecsb != NULL);
    g_return_if_fail (M_IS_CELL_SPIN_BUTTON (ecsb));
    g_return_if_fail (ecv != NULL);
    
    ecsb_view  = (ECellSpinButtonView *) ecv; 
    etm        = ecsb_view->cell_view.e_table_model;
    
    value  = GPOINTER_TO_INT (e_table_model_value_at (etm, col, row));
    new_value = value;
    
    switch (direction) {
    case STEP_UP:
        new_value = CLAMP (value + ecsb->step.i, 
                   ecsb->min.i, ecsb->max.i);
        break;
    case STEP_DOWN:
        new_value = CLAMP (value - ecsb->step.i, 
                   ecsb->min.i, ecsb->max.i);
        break;
    default:
        break;
    };

    str_value = g_strdup_printf ("%d", new_value);

    e_table_model_set_value_at (etm, col, row, str_value);

    g_free (str_value);
}

void
e_cell_spin_button_step_float  (ECellSpinButton       *ecsb,
                ECellView             *ecv,
                ECellSpinButtonStep    direction,
                gint                   col,
                gint                   row)
{
    ECellSpinButtonView   *ecsb_view; 
    
    ETableModel           *etm;
    gfloat                 value;
    gfloat                 new_value;
    gchar                 *str_value;
    
    g_return_if_fail (ecsb != NULL);
    g_return_if_fail (M_IS_CELL_SPIN_BUTTON (ecsb));
    g_return_if_fail (ecv != NULL);
    
    ecsb_view  = (ECellSpinButtonView *) ecv; 
    etm        = ecsb_view->cell_view.e_table_model;
    
    value  = *(gfloat *) e_table_model_value_at (etm, col, row);

    switch (direction) {
    case STEP_UP:
        new_value = CLAMP (value + ecsb->step.f, 
                   ecsb->min.f, ecsb->max.f);
        break;
    case STEP_DOWN:
        new_value = CLAMP (value - ecsb->step.f, 
                   ecsb->min.f, ecsb->max.f);
        break;
    default:
        new_value = value;
        break;
    };
    
    str_value = g_strdup_printf ("%f", new_value);

    e_table_model_set_value_at (etm, col, row, str_value);
    
    g_free (str_value);
}

E_MAKE_TYPE (e_cell_spin_button, "ECellSpinButton", ECellSpinButton, 
         e_cell_spin_button_class_init, e_cell_spin_button_init, 
         PARENT_TYPE)