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Added a new method NativeMessageBox::showMessageBox which asynchronously opens a native dialog box and calls a C++ lambda when dismissed

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This commit is contained in:
hogliux 2017-09-12 12:09:54 +01:00
parent e2c8e30d72
commit 8483aa4aea
2 changed files with 65 additions and 4 deletions
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31
modules/juce_gui_basics/windows/juce_AlertWindow.cpp
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@ -725,4 +725,35 @@ bool AlertWindow::showNativeDialogBox (const String& title,
}
#endif
//==============================================================================
struct NativeMessageBoxCallback : ModalComponentManager::Callback
{
NativeMessageBoxCallback (std::function<void (int)> && lambda)
: callback (static_cast<std::function<void (int)>&&> (lambda))
{}
void modalStateFinished (int returnValue) override { if (callback) callback (returnValue); }
std::function<void (int)> callback;
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (NativeMessageBoxCallback);
};
void NativeMessageBox::showMessageBox (MessageBoxType dialogType, AlertWindow::AlertIconType iconType,
const String& title, const String& message,
std::function<void (int)> && lambda, Component* associatedComponent)
{
auto* callback = new NativeMessageBoxCallback (static_cast<std::function<void (int)>&&> (lambda));
switch (dialogType)
{
case okType: showMessageBoxAsync (iconType, title, message, associatedComponent, callback); break;
case okCancelType: showOkCancelBox (iconType, title, message, associatedComponent, callback); break;
case yesNoType: showYesNoBox (iconType, title, message, associatedComponent, callback); break;
case yesNoCancelType: showYesNoCancelBox (iconType, title, message, associatedComponent, callback); break;
default:
jassertfalse;
}
}
} // namespace juce

38
modules/juce_gui_basics/windows/juce_NativeMessageBox.h
View file

@ -34,6 +34,15 @@ namespace juce
class NativeMessageBox
{
public:
/** A set of enums describing the type of dialog box */
enum MessageBoxType
{
okType, /** A message box with a simple ok button. */
okCancelType, /** A message box with an ok and cancel button. */
yesNoType, /** A message box with a yes and no button. */
yesNoCancelType, /** A message box with a yes, no and cancel button. */
};
/** Shows a dialog box that just has a message and a single 'ok' button to close it.
The box is shown modally, and the method will block until the user has clicked its
@ -53,6 +62,27 @@ public:
Component* associatedComponent = nullptr);
#endif
/** Shows a dialog box asynchronously triggering a lambda when the user dismisses the box.
The box will be displayed and placed into a modal state, but this method will return
immediately, and the lambda will be invoked later when the user dismisses the box.
@param dialogType the type of the dialog
@param iconType the type of icon to show
@param title the headline to show at the top of the box
@param message a longer, more descriptive message to show underneath the title
@param lambda a lambda which will be triggered when the box is dismissed
@param associatedComponent if this is non-null, it specifies the component that the
alert window should be associated with. Depending on the look
and feel, this might be used for positioning of the alert window.
*/
static void JUCE_CALLTYPE showMessageBox (MessageBoxType dialogType,
AlertWindow::AlertIconType iconType,
const String& title,
const String& message,
std::function<void (int)> && lambda = {},
Component* associatedComponent = nullptr);
/** Shows a dialog box that just has a message and a single 'ok' button to close it.
The box will be displayed and placed into a modal state, but this method will return
@ -71,10 +101,10 @@ public:
before it gets called.
*/
static void JUCE_CALLTYPE showMessageBoxAsync (AlertWindow::AlertIconType iconType,
const String& title,
const String& message,
Component* associatedComponent = nullptr,
ModalComponentManager::Callback* callback = nullptr);
const String& title,
const String& message,
Component* associatedComponent = nullptr,
ModalComponentManager::Callback* callback = nullptr);
/** Shows a dialog box with two buttons.