/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* e-selection-model.c: a Selection Model
*
* Author:
* Christopher James Lahey <clahey@ximian.com>
*
* (C) 2000, 2001 Ximian, Inc.
*/
#include <config.h>
#include <gdk/gdkkeysyms.h>
#include <gtk/gtksignal.h>
#include "e-selection-model.h"
#include "gal/util/e-util.h"
#define ESM_CLASS(e) ((ESelectionModelClass *)((GtkObject *)e)->klass)
#define PARENT_TYPE gtk_object_get_type ()
static GtkObjectClass *e_selection_model_parent_class;
enum {
CURSOR_CHANGED,
CURSOR_ACTIVATED,
SELECTION_CHANGED,
LAST_SIGNAL
};
static guint e_selection_model_signals [LAST_SIGNAL] = { 0, };
enum {
ARG_0,
ARG_SORTER,
ARG_SELECTION_MODE,
ARG_CURSOR_MODE,
};
inline static void
add_sorter(ESelectionModel *esm, ESorter *sorter)
{
esm->sorter = sorter;
if (sorter) {
gtk_object_ref(GTK_OBJECT(sorter));
}
}
inline static void
drop_sorter(ESelectionModel *esm)
{
if (esm->sorter) {
gtk_object_unref(GTK_OBJECT(esm->sorter));
}
esm->sorter = NULL;
}
static void
esm_destroy (GtkObject *object)
{
ESelectionModel *esm;
esm = E_SELECTION_MODEL (object);
drop_sorter(esm);
}
static void
esm_get_arg (GtkObject *o, GtkArg *arg, guint arg_id)
{
ESelectionModel *esm = E_SELECTION_MODEL (o);
switch (arg_id){
case ARG_SORTER:
GTK_VALUE_OBJECT (*arg) = GTK_OBJECT(esm->sorter);
break;
case ARG_SELECTION_MODE:
GTK_VALUE_ENUM(*arg) = esm->mode;
break;
case ARG_CURSOR_MODE:
GTK_VALUE_ENUM(*arg) = esm->cursor_mode;
break;
}
}
static void
esm_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
{
ESelectionModel *esm = E_SELECTION_MODEL (o);
switch (arg_id){
case ARG_SORTER:
drop_sorter(esm);
add_sorter(esm, GTK_VALUE_OBJECT (*arg) ? E_SORTER(GTK_VALUE_OBJECT (*arg)) : NULL);
break;
case ARG_SELECTION_MODE:
esm->mode = GTK_VALUE_ENUM(*arg);
if (esm->mode == GTK_SELECTION_SINGLE) {
int cursor_row = e_selection_model_cursor_row(esm);
int cursor_col = e_selection_model_cursor_col(esm);
e_selection_model_do_something(esm, cursor_row, cursor_col, 0);
}
break;
case ARG_CURSOR_MODE:
esm->cursor_mode = GTK_VALUE_ENUM(*arg);
break;
}
}
static void
e_selection_model_init (ESelectionModel *selection)
{
selection->mode = GTK_SELECTION_MULTIPLE;
selection->cursor_mode = E_CURSOR_SIMPLE;
}
static void
e_selection_model_class_init (ESelectionModelClass *klass)
{
GtkObjectClass *object_class;
e_selection_model_parent_class = gtk_type_class (gtk_object_get_type ());
object_class = GTK_OBJECT_CLASS(klass);
object_class->destroy = esm_destroy;
object_class->get_arg = esm_get_arg;
object_class->set_arg = esm_set_arg;
e_selection_model_signals [CURSOR_CHANGED] =
gtk_signal_new ("cursor_changed",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (ESelectionModelClass, cursor_changed),
gtk_marshal_NONE__INT_INT,
GTK_TYPE_NONE, 2, GTK_TYPE_INT, GTK_TYPE_INT);
e_selection_model_signals [CURSOR_ACTIVATED] =
gtk_signal_new ("cursor_activated",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (ESelectionModelClass, cursor_activated),
gtk_marshal_NONE__INT_INT,
GTK_TYPE_NONE, 2, GTK_TYPE_INT, GTK_TYPE_INT);
e_selection_model_signals [SELECTION_CHANGED] =
gtk_signal_new ("selection_changed",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (ESelectionModelClass, selection_changed),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE, 0);
klass->cursor_changed = NULL;
klass->cursor_activated = NULL;
klass->selection_changed = NULL;
klass->is_row_selected = NULL;
klass->foreach = NULL;
klass->clear = NULL;
klass->selected_count = NULL;
klass->select_all = NULL;
klass->invert_selection = NULL;
klass->row_count = NULL;
klass->change_one_row = NULL;
klass->change_cursor = NULL;
klass->cursor_row = NULL;
klass->cursor_col = NULL;
klass->select_single_row = NULL;
klass->toggle_single_row = NULL;
klass->move_selection_end = NULL;
klass->set_selection_end = NULL;
gtk_object_class_add_signals (object_class, e_selection_model_signals, LAST_SIGNAL);
gtk_object_add_arg_type ("ESelectionModel::sorter", GTK_TYPE_OBJECT,
GTK_ARG_READWRITE, ARG_SORTER);
gtk_object_add_arg_type ("ESelectionModel::selection_mode", GTK_TYPE_ENUM,
GTK_ARG_READWRITE, ARG_SELECTION_MODE);
gtk_object_add_arg_type ("ESelectionModel::cursor_mode", GTK_TYPE_ENUM,
GTK_ARG_READWRITE, ARG_CURSOR_MODE);
}
E_MAKE_TYPE(e_selection_model, "ESelectionModel", ESelectionModel,
e_selection_model_class_init, e_selection_model_init, PARENT_TYPE);
/**
* e_selection_model_is_row_selected
* @selection: #ESelectionModel to check
* @n: The row to check
*
* This routine calculates whether the given row is selected.
*
* Returns: %TRUE if the given row is selected
*/
gboolean
e_selection_model_is_row_selected (ESelectionModel *selection,
gint n)
{
if (ESM_CLASS(selection)->is_row_selected)
return ESM_CLASS(selection)->is_row_selected (selection, n);
else
return FALSE;
}
/**
* e_selection_model_foreach
* @selection: #ESelectionModel to traverse
* @callback: The callback function to call back.
* @closure: The closure
*
* This routine calls the given callback function once for each
* selected row, passing closure as the closure.
*/
void
e_selection_model_foreach (ESelectionModel *selection,
EForeachFunc callback,
gpointer closure)
{
if (ESM_CLASS(selection)->foreach)
ESM_CLASS(selection)->foreach (selection, callback, closure);
}
/**
* e_selection_model_clear
* @selection: #ESelectionModel to clear
*
* This routine clears the selection to no rows selected.
*/
void
e_selection_model_clear(ESelectionModel *selection)
{
if (ESM_CLASS(selection)->clear)
ESM_CLASS(selection)->clear (selection);
}
/**
* e_selection_model_selected_count
* @selection: #ESelectionModel to count
*
* This routine calculates the number of rows selected.
*
* Returns: The number of rows selected in the given model.
*/
gint
e_selection_model_selected_count (ESelectionModel *selection)
{
if (ESM_CLASS(selection)->selected_count)
return ESM_CLASS(selection)->selected_count (selection);
else
return 0;
}
/**
* e_selection_model_select_all
* @selection: #ESelectionModel to select all
*
* This routine selects all the rows in the given
* #ESelectionModel.
*/
void
e_selection_model_select_all (ESelectionModel *selection)
{
if (ESM_CLASS(selection)->select_all)
ESM_CLASS(selection)->select_all (selection);
}
/**
* e_selection_model_invert_selection
* @selection: #ESelectionModel to invert
*
* This routine inverts all the rows in the given
* #ESelectionModel.
*/
void
e_selection_model_invert_selection (ESelectionModel *selection)
{
if (ESM_CLASS(selection)->invert_selection)
ESM_CLASS(selection)->invert_selection (selection);
}
int
e_selection_model_row_count (ESelectionModel *selection)
{
if (ESM_CLASS(selection)->row_count)
return ESM_CLASS(selection)->row_count (selection);
else
return 0;
}
void
e_selection_model_change_one_row(ESelectionModel *selection, int row, gboolean grow)
{
if (ESM_CLASS(selection)->change_one_row)
ESM_CLASS(selection)->change_one_row (selection, row, grow);
}
void
e_selection_model_change_cursor (ESelectionModel *selection, int row, int col)
{
if (ESM_CLASS(selection)->change_cursor)
ESM_CLASS(selection)->change_cursor (selection, row, col);
}
int
e_selection_model_cursor_row (ESelectionModel *selection)
{
if (ESM_CLASS(selection)->cursor_row)
return ESM_CLASS(selection)->cursor_row (selection);
else
return -1;
}
int
e_selection_model_cursor_col (ESelectionModel *selection)
{
if (ESM_CLASS(selection)->cursor_col)
return ESM_CLASS(selection)->cursor_col (selection);
else
return -1;
}
void
e_selection_model_select_single_row (ESelectionModel *selection, int row)
{
if (ESM_CLASS(selection)->select_single_row)
ESM_CLASS(selection)->select_single_row (selection, row);
}
void
e_selection_model_toggle_single_row (ESelectionModel *selection, int row)
{
if (ESM_CLASS(selection)->toggle_single_row)
ESM_CLASS(selection)->toggle_single_row (selection, row);
}
void
e_selection_model_move_selection_end (ESelectionModel *selection, int row)
{
if (ESM_CLASS(selection)->move_selection_end)
ESM_CLASS(selection)->move_selection_end (selection, row);
}
void
e_selection_model_set_selection_end (ESelectionModel *selection, int row)
{
if (ESM_CLASS(selection)->set_selection_end)
ESM_CLASS(selection)->set_selection_end (selection, row);
}
/**
* e_selection_model_do_something
* @selection: #ESelectionModel to do something to.
* @row: The row to do something in.
* @col: The col to do something in.
* @state: The state in which to do something.
*
* This routine does whatever is appropriate as if the user clicked
* the mouse in the given row and column.
*/
void
e_selection_model_do_something (ESelectionModel *selection,
guint row,
guint col,
GdkModifierType state)
{
gint shift_p = state & GDK_SHIFT_MASK;
gint ctrl_p = state & GDK_CONTROL_MASK;
int row_count;
if (row == -1 && col != -1)
row = 0;
if (col == -1 && row != -1)
col = 0;
row_count = e_selection_model_row_count(selection);
if (row_count >= 0 && row < row_count) {
switch (selection->mode) {
case GTK_SELECTION_SINGLE:
e_selection_model_select_single_row (selection, row);
break;
case GTK_SELECTION_BROWSE:
case GTK_SELECTION_MULTIPLE:
case GTK_SELECTION_EXTENDED:
if (shift_p) {
e_selection_model_set_selection_end (selection, row);
} else {
if (ctrl_p) {
e_selection_model_toggle_single_row (selection, row);
} else {
e_selection_model_select_single_row (selection, row);
}
}
break;
}
e_selection_model_change_cursor(selection, row, col);
gtk_signal_emit(GTK_OBJECT(selection),
e_selection_model_signals[CURSOR_CHANGED], row, col);
gtk_signal_emit(GTK_OBJECT(selection),
e_selection_model_signals[CURSOR_ACTIVATED], row, col);
}
}
/**
* e_selection_model_maybe_do_something
* @selection: #ESelectionModel to do something to.
* @row: The row to do something in.
* @col: The col to do something in.
* @state: The state in which to do something.
*
* If this row is selected, this routine just moves the cursor row and
* column. Otherwise, it does the same thing as
* e_selection_model_do_something(). This is for being used on
* right clicks and other events where if the user hit the selection,
* they don't want it to change.
*/
void
e_selection_model_maybe_do_something (ESelectionModel *selection,
guint row,
guint col,
GdkModifierType state)
{
if (e_selection_model_is_row_selected(selection, row)) {
e_selection_model_change_cursor(selection, row, col);
gtk_signal_emit(GTK_OBJECT(selection),
e_selection_model_signals[CURSOR_CHANGED], row, col);
} else {
e_selection_model_do_something(selection, row, col, state);
}
}
void
e_selection_model_select_as_key_press (ESelectionModel *selection,
guint row,
guint col,
GdkModifierType state)
{
int cursor_activated = TRUE;
gint shift_p = state & GDK_SHIFT_MASK;
gint ctrl_p = state & GDK_CONTROL_MASK;
switch (selection->mode) {
case GTK_SELECTION_BROWSE:
if (shift_p) {
e_selection_model_set_selection_end (selection, row);
} else if (!ctrl_p) {
e_selection_model_select_single_row (selection, row);
} else
cursor_activated = FALSE;
break;
case GTK_SELECTION_SINGLE:
case GTK_SELECTION_MULTIPLE:
case GTK_SELECTION_EXTENDED:
e_selection_model_select_single_row (selection, row);
break;
}
if (row != -1) {
e_selection_model_change_cursor(selection, row, col);
gtk_signal_emit(GTK_OBJECT(selection),
e_selection_model_signals[CURSOR_CHANGED], row, col);
if (cursor_activated)
gtk_signal_emit(GTK_OBJECT(selection),
e_selection_model_signals[CURSOR_ACTIVATED], row, col);
}
}
static gint
move_selection (ESelectionModel *selection,
gboolean up,
GdkModifierType state)
{
int row = e_selection_model_cursor_row(selection);
int col = e_selection_model_cursor_col(selection);
int row_count;
row = e_sorter_model_to_sorted(selection->sorter, row);
if (up)
row--;
else
row++;
if (row < 0)
row = 0;
row_count = e_selection_model_row_count(selection);
if (row >= row_count)
row = row_count - 1;
row = e_sorter_sorted_to_model(selection->sorter, row);
e_selection_model_select_as_key_press (selection, row, col, state);
return TRUE;
}
/**
* e_selection_model_key_press
* @selection: #ESelectionModel to affect.
* @key: The event.
*
* This routine does whatever is appropriate as if the user pressed
* the given key.
*
* Returns: %TRUE if the #ESelectionModel used the key.
*/
gint
e_selection_model_key_press (ESelectionModel *selection,
GdkEventKey *key)
{
switch (key->keyval) {
case GDK_Up:
return move_selection(selection, TRUE, key->state);
break;
case GDK_Down:
return move_selection(selection, FALSE, key->state);
break;
case GDK_space:
case GDK_KP_Space:
if (selection->mode != GTK_SELECTION_SINGLE) {
int row = e_selection_model_cursor_row(selection);
int col = e_selection_model_cursor_col(selection);
e_selection_model_toggle_single_row (selection, row);
gtk_signal_emit(GTK_OBJECT(selection),
e_selection_model_signals[CURSOR_ACTIVATED], row, col);
return TRUE;
}
break;
case GDK_Return:
case GDK_KP_Enter:
if (selection->mode != GTK_SELECTION_SINGLE) {
int row = e_selection_model_cursor_row(selection);
int col = e_selection_model_cursor_col(selection);
e_selection_model_select_single_row (selection, row);
gtk_signal_emit(GTK_OBJECT(selection),
e_selection_model_signals[CURSOR_ACTIVATED], row, col);
return TRUE;
}
break;
case GDK_Home:
case GDK_KP_Home:
if (selection->cursor_mode == E_CURSOR_LINE) {
int row = 0;
int cursor_col = e_selection_model_cursor_col(selection);
row = e_sorter_sorted_to_model(selection->sorter, row);
e_selection_model_select_as_key_press (selection, row, cursor_col, key->state);
return TRUE;
}
break;
case GDK_End:
case GDK_KP_End:
if (selection->cursor_mode == E_CURSOR_LINE) {
int row = e_selection_model_row_count(selection) - 1;
int cursor_col = e_selection_model_cursor_col(selection);
row = e_sorter_sorted_to_model(selection->sorter, row);
e_selection_model_select_as_key_press (selection, row, cursor_col, key->state);
return TRUE;
}
break;
}
return FALSE;
}
void
e_selection_model_cursor_changed (ESelectionModel *selection,
int row,
int col)
{
gtk_signal_emit(GTK_OBJECT(selection),
e_selection_model_signals[CURSOR_CHANGED], row, col);
}
void
e_selection_model_cursor_activated (ESelectionModel *selection,
int row,
int col)
{
gtk_signal_emit(GTK_OBJECT(selection),
e_selection_model_signals[CURSOR_ACTIVATED], row, col);
}
void
e_selection_model_selection_changed (ESelectionModel *selection)
{
gtk_signal_emit(GTK_OBJECT(selection),
e_selection_model_signals[SELECTION_CHANGED]);
}
