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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
View file

@ -725,4 +725,35 @@ bool AlertWindow::showNativeDialogBox (const String& title,
} }
#endif #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 } // namespace juce

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

@ -34,6 +34,15 @@ namespace juce
class NativeMessageBox class NativeMessageBox
{ {
public: 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. /** 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 The box is shown modally, and the method will block until the user has clicked its
@ -53,6 +62,27 @@ public:
Component* associatedComponent = nullptr); Component* associatedComponent = nullptr);
#endif #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. /** 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 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. before it gets called.
*/ */
static void JUCE_CALLTYPE showMessageBoxAsync (AlertWindow::AlertIconType iconType, static void JUCE_CALLTYPE showMessageBoxAsync (AlertWindow::AlertIconType iconType,
const String& title, const String& title,
const String& message, const String& message,
Component* associatedComponent = nullptr, Component* associatedComponent = nullptr,
ModalComponentManager::Callback* callback = nullptr); ModalComponentManager::Callback* callback = nullptr);
/** Shows a dialog box with two buttons. /** Shows a dialog box with two buttons.