void ButtonHandler (object obj, ButtonPressEventArgs args)
{
Gdk.EventButton pos = args.Event;
bool double_click = false;
int item_clicked = ItemAtPixel ((int) pos.X, (int) pos.Y);
int begin = ItemAt (0, 0);
int end = Math.Min (ItemAt (visible_cols, visible_rows - 1), image_count);
int count = visible_cols * visible_rows;
if (item_clicked < begin || item_clicked >= end) {
args.RetVal = true;
return;
}
GrabFocus ();
switch (pos.Button){
case 1:
bool [] repaint = new bool [count];
bool control_pressed = (pos.State & Gdk.ModifierType.ControlMask) != 0;
bool shift_pressed = (pos.State & Gdk.ModifierType.ShiftMask) != 0;
if (shift_pressed && selection_start_item != -1){
int first;
int last;
if (selection_start_item != item_clicked) {
Selection.SetAll (false);
if (selection_start_item < item_clicked) {
first = selection_start_item;
last = item_clicked;
} else {
first = item_clicked;
last = selection_start_item;
}
for (int i = first; i <= last; i++) {
Selection [i] = true;
if (i >= begin)
repaint [i - begin] = true;
select_count++;
}
} else {
Selection[selection_start_item] = ! Selection[selection_start_item];
repaint[selection_start_item] = true;
}
} else if (control_pressed){
select_count++;
if (Selection [item_clicked]){
Selection [item_clicked] = true;
select_count--;
} else {
Selection [item_clicked] = true;
select_count++;
}
Selection [item_clicked] = !Selection [item_clicked];
repaint [item_clicked-begin] = true;
} else {
if (select_count != 0){
for (int i = begin; i < end; i++){
if (Selection [i])
repaint [i - begin] = true;
}
Selection.SetAll (false);
}
select_count = 1;
Selection [item_clicked] = true;
repaint [item_clicked-begin] = true;
selection_start_item = item_clicked;
}
for (int i = begin; i < end; i++){
if (repaint [i - begin]){
DrawCell (i);
}
}
if (SelectionChanged != null)
SelectionChanged ();
break;
case 3:
IconListPopup ip = new IconListPopup (this, item_clicked);
ip.Activate (pos);
break;
default:
return;
}
if (last_click_time != 0) {
if (pos.Time - last_click_time <= double_click_time &&
item_clicked == last_item_clicked)
{
double_click = true;
}
}
if (double_click) {
if (this.Activated != null)
this.Activated (this, EventArgs.Empty);
last_click_time = 0;
last_item_clicked = 0;
} else {
last_click_time = pos.Time;
last_item_clicked = item_clicked;
}
args.RetVal = true;
}
void ButtonHandler(object obj, ButtonPressEventArgs args)
{
Gdk.EventButton pos = args.Event;
bool double_click = false;
int item_clicked = ItemAtPixel((int)pos.X, (int)pos.Y);
int begin = ItemAt(0, 0);
int end = Math.Min(ItemAt(visible_cols, visible_rows - 1), image_count);
int count = visible_cols * visible_rows;
if (item_clicked < begin || item_clicked >= end)
{
args.RetVal = true;
return;
}
GrabFocus();
switch (pos.Button)
{
case 1:
bool [] repaint = new bool [count];
bool control_pressed = (pos.State & Gdk.ModifierType.ControlMask) != 0;
bool shift_pressed = (pos.State & Gdk.ModifierType.ShiftMask) != 0;
if (shift_pressed && selection_start_item != -1)
{
int first;
int last;
if (selection_start_item != item_clicked)
{
Selection.SetAll(false);
if (selection_start_item < item_clicked)
{
first = selection_start_item;
last = item_clicked;
}
else
{
first = item_clicked;
last = selection_start_item;
}
for (int i = first; i <= last; i++)
{
Selection [i] = true;
if (i >= begin)
{
repaint [i - begin] = true;
}
select_count++;
}
}
else
{
Selection[selection_start_item] = !Selection[selection_start_item];
repaint[selection_start_item] = true;
}
}
else if (control_pressed)
{
select_count++;
if (Selection [item_clicked])
{
Selection [item_clicked] = true;
select_count--;
}
else
{
Selection [item_clicked] = true;
select_count++;
}
Selection [item_clicked] = !Selection [item_clicked];
repaint [item_clicked - begin] = true;
}
else
{
if (select_count != 0)
{
for (int i = begin; i < end; i++)
{
if (Selection [i])
{
repaint [i - begin] = true;
}
}
Selection.SetAll(false);
}
select_count = 1;
Selection [item_clicked] = true;
repaint [item_clicked - begin] = true;
selection_start_item = item_clicked;
}
for (int i = begin; i < end; i++)
{
if (repaint [i - begin])
{
DrawCell(i);
}
}
if (SelectionChanged != null)
{
SelectionChanged();
}
break;
case 3:
IconListPopup ip = new IconListPopup(this, item_clicked);
ip.Activate(pos);
break;
default:
return;
}
if (last_click_time != 0)
{
if (pos.Time - last_click_time <= double_click_time &&
item_clicked == last_item_clicked)
{
double_click = true;
}
}
if (double_click)
{
if (this.Activated != null)
{
this.Activated(this, EventArgs.Empty);
}
last_click_time = 0;
last_item_clicked = 0;
}
else
{
last_click_time = pos.Time;
last_item_clicked = item_clicked;
}
args.RetVal = true;
}
