// 设状态, 供Stop调
// locks: 集合读锁(如果bLock == true)
public void ChangeState(Stop stop,
StateParts parts,
bool bLock)
{
if (stops.Count == 0)
return;
// TODO: 这里的整个逻辑有问题: 即便视觉上不表现，内存也应当兑现修改，以备后面切换时显示出来。动态不那么及时更新是可以的，但是关键状态变化，例如显示、隐藏等动作，一定要兑现到内存
if (stop != null && stop.ProgressValue == -1)
{
if ((parts & StateParts.ProgressValue) != 0)
{
// 如果为隐藏progress的意图，
// 将max和min都设置为-1，以便将来刷新的时候能体现隐藏
// 2011/10/12
stop.ProgressMax = -1;
stop.ProgressMin = -1;
}
}
if (bLock == true)
{
WriteDebugInfo("collection read lock 7\r\n");
this.m_collectionlock.AcquireReaderLock(Stop.m_nLockTimeout);
}
bool bLoop = false;
Stop active = null;
try
{
if (bMultiple == false)
{
if (stop == null)
{
stop = (Stop)stops[stops.Count - 1];
}
else
{
if (stop != stops[stops.Count - 1])
return;
}
bLoop = stop.State == 0 ? true : false;
active = stop;
}
else
{
bool bFound = false;
for (int i = 0; i < stops.Count; i++)
{
Stop temp = (Stop)stops[i];
if (bLoop == false)
{
if (temp.State == 0)
bLoop = true;
}
if (stop == temp)
{
bFound = true;
active = temp;
break;
}
}
if (bFound == false)
return;
}
// 移走
}
finally
{
if (bLock == true)
{
this.m_collectionlock.ReleaseReaderLock();
WriteDebugInfo("collection read unlock 7\r\n");
}
}
//if (m_stopToolButton != null) //???
//{
if ((parts & StateParts.StopButton) != 0)
EnableStopButtons(bLoop);
if ((parts & StateParts.ReverseButtons) != 0)
EnableReverseButtons(!bLoop,
parts);
//}
//if (m_messageStatusBar != null)
//{
if ((parts & StateParts.Message) != 0)
InternalSetMessage(active.Message);
//}
if ((parts & StateParts.ProgressRange) != 0)
{
// active.ProgressValue = 0; // 初始化
active.ProgressValue = active.ProgressMin; // 初始化 2008/5/16 changed
InternalSetProgressBar(active.ProgressMin, active.ProgressMax, -1);
}
if ((parts & StateParts.ProgressValue) != 0)
{
/*
if (active.ProgressValue == -1)
{
// 如果为隐藏progress的意图，
// 将max和min都设置为-1，以便将来刷新的时候能体现隐藏
// 2008/3/10
active.ProgressMax = -1;
active.ProgressMin = -1;
}
* */
InternalSetProgressBar(-1, -1, active.ProgressValue);
}
}
// 整体改变reverse_buttons的Enabled状态。
// 注意，在false时，是要改变为disabled状态；而true时，则是要恢复原来记忆(disable前)的状态
// parameters:
// bEnabled true表示希望恢复按钮原来状态；false希望disable按钮
// parts SaveEnabledState希望先保存按钮原来的值；RestoreEnabledState表示要恢复按钮原来的值
void EnableReverseButtons(bool bEnabled,
StateParts parts)
{
if (m_reverseButtons == null)
return;
if (m_reverseButtonEnableStates == null)
m_reverseButtonEnableStates = new List<int>();
/*
if ((parts & StateParts.All) != 0)
throw new Exception("StateParts枚举中除了SaveEnabledState和RestoreEnabledState值外，其他值对于本函数没有意义");
* */
bool bSave = false;
if ((parts & StateParts.SaveEnabledState) != 0)
bSave = true;
bool bRestore = false;
if ((parts & StateParts.RestoreEnabledState) != 0)
bRestore = true;
// 保证两个数组的大小一致
while (m_reverseButtonEnableStates.Count < m_reverseButtons.Count)
{
m_reverseButtonEnableStates.Add(-1);
}
for (int i = 0; i < m_reverseButtons.Count; i++)
{
int nOldState = m_reverseButtonEnableStates[i];
bool bEnableResult = bEnabled;
// TODO: 状态不明的时候，可以通过事件从外部索取信息
// 如果bEnabled要求true，而旧状态不明，那就询问
if (nOldState == -1 && bEnabled == true)
{
if (this.OnAskReverseButtonState != null)
{
AskReverseButtonStateEventArgs e = new AskReverseButtonStateEventArgs();
e.EnableQuestion = true;
e.Button = m_reverseButtons[i];
this.OnAskReverseButtonState(this, e);
bEnableResult = e.EnableResult;
}
}
bool bOldState = (nOldState == 1 ? true : false);
object button = m_reverseButtons[i];
if (button is Button)
{
bOldState = ((Button)button).Enabled;
// ((Button)button).Enabled = (bRestore == true ? bOldState : bEnabled);
Safe_EnableButton((Button)button,
(bRestore == true ? bOldState : bEnableResult));
}
else if (button is ToolBarButton)
{
// ((ToolBarButton)button).Enabled = bEnabled;
bOldState = Safe_EnableToolBarButton(((ToolBarButton)button),
bRestore == true ? bOldState : bEnableResult);
/*
if (button.Parent.InvokeRequired)
{
Delegate_SetToolBarButtonEnable d = new Delegate_SetToolBarButtonEnable(SetToolBarButtonEnable);
button.Parent.Invoke(d, new object[] { button, bEnabled });
}
else
{
button.Enabled = bEnabled;
}
* */
}
else if (button is ToolStripButton)
{
// ((ToolStripButton)button).Enabled = bEnabled;
bOldState = Safe_EnableToolStripButton(((ToolStripButton)button),
bRestore == true ? bOldState : bEnableResult);
}
// 主动disable前，记忆以前的状态
if (bEnabled == false
&& bSave == true)
m_reverseButtonEnableStates[i] = (bOldState == true ? 1 : 0);
}
}
