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pgscrollarea.cpp
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pgscrollarea.cpp
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/*
ParaGUI - crossplatform widgetset
Copyright (C) 2000-2004 Alexander Pipelka
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
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
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Alexander Pipelka
pipelka@teleweb.at
Last Update: $Author: upi $
Update Date: $Date: 2006/12/04 09:34:33 $
Source File: $Source: /cvsroot/openmortal/openmortal/src/paragui/pgscrollarea.cpp,v $
CVS/RCS Revision: $Revision: 1.1 $
Status: $State: Exp $
*/
#include "pgscrollarea.h"
#include "common.h"
PG_ScrollArea::PG_ScrollArea(PG_Widget* parent, const PG_Rect& r) : PG_Widget(parent, r),
my_shiftx(false), my_shifty(false), my_AddResizeParent(false), my_RemoveResizeParent(false) {
}
PG_ScrollArea::~PG_ScrollArea() {
}
void PG_ScrollArea::ScrollTo(Uint16 x, Uint16 y) {
if (my_area.x == x && my_area.y == y)
return;
if(y > my_area.h - my_height && my_area.h > my_height) {
y = my_area.h - my_height;
}
if(x > my_area.w - my_width && my_area.w > my_width) {
x = my_area.w - my_width;
}
Sint32 dx = my_area.x - x;
Sint32 dy = my_area.y - y;
my_area.x = x;
my_area.y = y;
if(GetChildList() == NULL) {
Update();
return;
}
for(PG_Widget* i = GetChildList()->first(); i != NULL; i = i->next()) {
i->MoveRect(i->x + dx, i->y + dy);
}
Update();
}
void PG_ScrollArea::AddChild(PG_Widget* child) {
PG_Widget::AddChild(child);
child->MoveRect(child->x - my_area.x, child->y - my_area.y);
if(child->x+child->w+my_area.x-my_xpos > my_area.w) {
my_area.w = child->x+child->w+my_area.x-my_xpos;
sigAreaChangedWidth(this, my_area.w);
if(my_AddResizeParent) {
GetParent()->SizeWidget(my_area.w, GetParent()->my_height);
}
}
if(child->y+child->h+my_area.y-my_ypos > my_area.h) {
my_area.h = child->y+child->h+my_area.y-my_ypos;
sigAreaChangedHeight(this, my_area.h);
if(my_AddResizeParent) {
GetParent()->SizeWidget(GetParent()->my_width, my_area.h);
}
}
if(IsVisible()) {
child->Show();
}
}
void PG_ScrollArea::ScrollToWidget(PG_Widget* widget, bool bVertical) {
if(GetWidgetCount() == 0) {
return;
}
Uint16 ypos = 0;
Uint16 xpos = 0;
if(bVertical) {
ypos = widget->y - my_ypos + my_area.y;
xpos = my_area.x;
}
else {
xpos = widget->x - my_xpos + my_area.x;
ypos = my_area.y;
}
ScrollTo(xpos, ypos);
}
void PG_ScrollArea::EnsureVisible(PG_Widget *widget, bool bVertical)
{
debug("Widget: %3d : %3d - %3d x %3d\n", widget->my_xpos, widget->my_ypos, widget->my_width, widget->my_height);
debug("Widget: %3d : %3d - %3d x %3d\n", widget->x, widget->y, widget->w, widget->h);
debug("Scroll: %3d : %3d - %3d x %3d\n", my_xpos, my_ypos, my_width, my_height);
debug("Scroll: %3d : %3d - %3d x %3d\n", x, y, w, h);
int dy = 0;
if (widget->my_ypos < my_ypos)
{
dy = widget->my_ypos - my_ypos;
}
else if (widget->my_ypos + widget->my_height > my_ypos + my_height)
{
dy = (widget->my_ypos + widget->my_height) - (my_ypos + my_height);
}
ScrollTo(my_area.x, my_area.y + dy);
}
bool PG_ScrollArea::RemoveChild(PG_Widget* child) {
// recalc scrollarea
Uint16 w = 0;
Uint16 h = 0;
if(GetChildList() == NULL) {
return false;
}
// remove widget
PG_Rect r = *child;
if(!PG_Widget::RemoveChild(child)) {
return false;
}
for(PG_Widget* i = GetChildList()->first(); i != NULL; i = i->next()) {
// check if i should move the widget (x)
if(my_shiftx && (i->x >= r.x+r.w)) {
i->MoveRect(i->x - r.w, i->y);
}
// check if i should move the widget (y)
if(my_shifty && (i->y >= r.y+r.h)) {
i->MoveRect(i->x, i->y - r.h);
}
// recalc new scrollarea
if(i->x+i->w+my_area.x-my_xpos > w) {
w = i->x+i->w+my_area.x-my_xpos;
}
if(i->y+i->h+my_area.y-my_ypos > h) {
h = i->y+i->h+my_area.y-my_ypos;
}
}
// signal changes
if(w != my_area.w) {
my_area.w = w;
sigAreaChangedWidth(this, my_area.w);
if(my_RemoveResizeParent) {
GetParent()->SizeWidget(my_area.w, GetParent()->my_height);
}
}
if(h != my_area.h) {
my_area.h = h;
sigAreaChangedHeight(this, my_area.h);
if(my_RemoveResizeParent) {
GetParent()->SizeWidget(GetParent()->my_width, my_area.h);
}
}
Update();
return true;
}
void PG_ScrollArea::RemoveAll() {
if(GetChildList() == NULL) {
return;
}
GetChildList()->clear();
Update();
}
void PG_ScrollArea::DeleteAll() {
if(GetChildList() == NULL) {
return;
}
PG_Widget* list = GetChildList()->first();
GetChildList()->clear();
Update();
for(; list != NULL; ) {
PG_Widget* w = list;
list = list->next();
delete w;
}
my_area.w = 0;
my_area.h = 0;
sigAreaChangedWidth(this, my_area.w);
sigAreaChangedHeight(this, my_area.h);
}
Uint16 PG_ScrollArea::GetWidgetCount() {
if(GetChildList() == NULL) {
return 0;
}
return GetChildList()->size();
}
Uint16 PG_ScrollArea::GetScrollPosX() {
return my_area.x;
}
Uint16 PG_ScrollArea::GetScrollPosY() {
return my_area.y;
}
void PG_ScrollArea::SetShiftOnRemove(bool shiftx, bool shifty) {
my_shiftx = shiftx;
my_shifty = shifty;
}
void PG_ScrollArea::SetAreaWidth(Uint16 w) {
if(my_area.w == w) {
return;
}
my_area.w = w;
sigAreaChangedWidth(this, my_area.w);
}
void PG_ScrollArea::SetAreaHeight(Uint16 h) {
if(my_area.h == h) {
return;
}
my_area.h = h;
sigAreaChangedHeight(this, my_area.h);
}
PG_Widget* PG_ScrollArea::GetFirstInList() {
PG_RectList* list = GetChildList();
if(list == NULL) {
return NULL;
}
return list->first();
}
void PG_ScrollArea::SetResizeParent(bool bRemove, bool bAdd) {
if(GetParent() == NULL) {
return;
}
my_RemoveResizeParent = bRemove;
my_AddResizeParent = bAdd;
}

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