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Added support for attaching listeners to the SettingsMessage, to be notified

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when a named value changes.

git-svn-id: http://svn.haiku-os.org/webpositive/webkit/trunk@338 94f232f2-1747-11df-bad5-a5bfde151594
This commit is contained in:
stippi 2010-03-22 18:04:31 +00:00 committed by Alexandre Deckner
parent 9ccfda9c50
commit 0ba16dd4c1
2 changed files with 161 additions and 45 deletions
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188
src/apps/webpositive/support/SettingsMessage.cpp
View File

@ -9,14 +9,19 @@
#include "SettingsMessage.h"
#include <new>
#include <Entry.h>
#include <File.h>
#include <Messenger.h>
#include <String.h>
SettingsMessage::SettingsMessage(directory_which directory,
const char* filename)
: BMessage('pref')
:
BMessage('pref'),
fListeners(4)
{
fStatus = find_directory(directory, &fPath);
@ -31,6 +36,9 @@ SettingsMessage::SettingsMessage(directory_which directory,
SettingsMessage::~SettingsMessage()
{
Save();
for (int32 i = fListeners.CountItems() - 1; i >= 0; i--)
delete reinterpret_cast<BMessenger*>(fListeners.ItemAtFast(i));
}
@ -67,139 +75,212 @@ SettingsMessage::Save() const
}
bool
SettingsMessage::AddListener(const BMessenger& listener)
{
BMessenger* listenerCopy = new(std::nothrow) BMessenger(listener);
if (listenerCopy && fListeners.AddItem(listenerCopy))
return true;
delete listenerCopy;
return false;
}
void
SettingsMessage::RemoveListener(const BMessenger& listener)
{
for (int32 i = fListeners.CountItems() - 1; i >= 0; i--) {
BMessenger* listenerItem = reinterpret_cast<BMessenger*>(
fListeners.ItemAtFast(i));
if (*listenerItem == listener) {
fListeners.RemoveItem(i);
delete listenerItem;
return;
}
}
}
// #pragma mark -
status_t
SettingsMessage::SetValue(const char* name, bool value)
{
if (ReplaceBool(name, value) == B_OK)
return B_OK;
return AddBool(name, value);
status_t ret = ReplaceBool(name, value);
if (ret != B_OK)
ret = AddBool(name, value);
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
status_t
SettingsMessage::SetValue(const char* name, int8 value)
{
if (ReplaceInt8(name, value) == B_OK)
return B_OK;
return AddInt8(name, value);
status_t ret = ReplaceInt8(name, value);
if (ret != B_OK)
ret = AddInt8(name, value);
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
status_t
SettingsMessage::SetValue(const char* name, int16 value)
{
if (ReplaceInt16(name, value) == B_OK)
return B_OK;
return AddInt16(name, value);
status_t ret = ReplaceInt16(name, value);
if (ret != B_OK)
ret = AddInt16(name, value);
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
status_t
SettingsMessage::SetValue(const char* name, int32 value)
{
if (ReplaceInt32(name, value) == B_OK)
return B_OK;
return AddInt32(name, value);
status_t ret = ReplaceInt32(name, value);
if (ret != B_OK)
ret = AddInt32(name, value);
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
status_t
SettingsMessage::SetValue(const char* name, uint32 value)
{
if (ReplaceInt32(name, (int32)value) == B_OK)
return B_OK;
return AddInt32(name, (int32)value);
status_t ret = ReplaceUInt32(name, value);
if (ret != B_OK)
ret = AddUInt32(name, value);
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
status_t
SettingsMessage::SetValue(const char* name, int64 value)
{
if (ReplaceInt64(name, value) == B_OK)
return B_OK;
return AddInt64(name, value);
status_t ret = ReplaceInt64(name, value);
if (ret != B_OK)
ret = AddInt64(name, value);
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
status_t
SettingsMessage::SetValue(const char* name, float value)
{
if (ReplaceFloat(name, value) == B_OK)
return B_OK;
return AddFloat(name, value);
status_t ret = ReplaceFloat(name, value);
if (ret != B_OK)
ret = AddFloat(name, value);
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
status_t
SettingsMessage::SetValue(const char* name, double value)
{
if (ReplaceDouble(name, value) == B_OK)
return B_OK;
return AddDouble(name, value);
status_t ret = ReplaceDouble(name, value);
if (ret != B_OK)
ret = AddDouble(name, value);
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
status_t
SettingsMessage::SetValue(const char* name, const char* value)
{
if (ReplaceString(name, value) == B_OK)
return B_OK;
return AddString(name, value);
status_t ret = ReplaceString(name, value);
if (ret != B_OK)
ret = AddString(name, value);
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
status_t
SettingsMessage::SetValue(const char* name, const BString& value)
{
return SetValue(name, value.String());
status_t ret = ReplaceString(name, value);
if (ret != B_OK)
ret = AddString(name, value);
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
status_t
SettingsMessage::SetValue(const char* name, const BPoint& value)
{
if (ReplacePoint(name, value) == B_OK)
return B_OK;
return AddPoint(name, value);
status_t ret = ReplacePoint(name, value);
if (ret != B_OK)
ret = AddPoint(name, value);
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
status_t
SettingsMessage::SetValue(const char* name, const BRect& value)
{
if (ReplaceRect(name, value) == B_OK)
return B_OK;
return AddRect(name, value);
status_t ret = ReplaceRect(name, value);
if (ret != B_OK)
ret = AddRect(name, value);
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
status_t
SettingsMessage::SetValue(const char* name, const entry_ref& value)
{
if (ReplaceRef(name, &value) == B_OK)
return B_OK;
return AddRef(name, &value);
status_t ret = ReplaceRef(name, &value);
if (ret != B_OK)
ret = AddRef(name, &value);
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
status_t
SettingsMessage::SetValue(const char* name, const BMessage& value)
{
if (ReplaceMessage(name, &value) == B_OK)
return B_OK;
return AddMessage(name, &value);
status_t ret = ReplaceMessage(name, &value);
if (ret != B_OK)
ret = AddMessage(name, &value);
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
status_t
SettingsMessage::SetValue(const char* name, const BFlattenable* value)
{
if (ReplaceFlat(name, const_cast<BFlattenable*>(value)) == B_OK)
return B_OK;
return AddFlat(name, const_cast<BFlattenable*>(value));
status_t ret = ReplaceFlat(name, const_cast<BFlattenable*>(value));
if (ret != B_OK)
ret = AddFlat(name, const_cast<BFlattenable*>(value));
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
@ -221,6 +302,8 @@ SettingsMessage::SetValue(const char* name, const BFont& value)
if (ReplaceMessage(name, &fontMessage) != B_OK)
ret = AddMessage(name, &fontMessage);
}
if (ret == B_OK)
_NotifyValueChanged(name);
return ret;
}
@ -383,3 +466,20 @@ SettingsMessage::GetValue(const char* name, const BFont& defaultValue) const
return value;
}
// #pragma mark - private
void
SettingsMessage::_NotifyValueChanged(const char* name) const
{
BMessage message(MSG_SETTINGS_VALUE_CHANGED);
message.AddString("name", name);
int32 count = fListeners.CountItems();
for (int32 i = 0; i < count; i++) {
BMessenger* listener = reinterpret_cast<BMessenger*>(
fListeners.ItemAtFast(i));
listener->SendMessage(&message);
}
}

18
src/apps/webpositive/support/SettingsMessage.h
View File

@ -1,5 +1,5 @@
/*
* Copyright 2008 Stephan Aßmus <superstippi@gmx.de>.
* Copyright 2008-2010 Stephan Aßmus <superstippi@gmx.de>.
* Copyright 1998 Eric Shepherd.
* All rights reserved. Distributed under the terms of the Be Sample Code
* license.
@ -7,13 +7,22 @@
#ifndef SETTINGS_MESSAGE_H
#define SETTINGS_MESSAGE_H
#include <FindDirectory.h>
#include <Font.h>
#include <List.h>
#include <Message.h>
#include <Path.h>
class BMessenger;
class BString;
enum {
MSG_SETTINGS_VALUE_CHANGED = 'stvc'
};
class SettingsMessage : public BMessage {
public:
SettingsMessage(directory_which directory,
@ -25,6 +34,9 @@ public:
status_t Load();
status_t Save() const;
bool AddListener(const BMessenger& listener);
void RemoveListener(const BMessenger& listener);
status_t SetValue(const char* name, bool value);
status_t SetValue(const char* name, int8 value);
status_t SetValue(const char* name, int16 value);
@ -76,9 +88,13 @@ public:
BFont GetValue(const char* name,
const BFont& defaultValue) const;
private:
void _NotifyValueChanged(const char* name) const;
private:
BPath fPath;
status_t fStatus;
BList fListeners;
};
#endif // SETTINGS_MESSAGE_H