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Implement Get/SetOpacity for Window (new in SDL 2.0.5)

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This commit is contained in:
Dmitry Marakasov 2016-11-14 18:34:27 +03:00
parent 39eea2b892
commit 49e3c6a6a9
4 changed files with 68 additions and 0 deletions
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4
CHANGES.md
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@ -2,6 +2,10 @@
All notable changes to this project will be documented in this file.
This project adheres to [Semantic Versioning](http://semver.org/).
## 0.14.0 - unreleased
### Added
* ```Window::GetOpacity()``` and ```Window()::SetOpacity()``` wrappers for functions appeared in SDL 2.0.5
## 0.13.0 - 2016-11-08
### Fixed
* Fixed SDL 2.0.4 specific ```AudioDevice``` methods: ```AudioDevice::QueueAudio()```, ```AudioDevice::GetQueuedAudioSize()```

16
SDL2pp/Window.cc
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@ -242,4 +242,20 @@ Window& Window::SetBordered(bool bordered) {
return *this;
}
#if SDL_VERSION_ATLEAST(2, 0, 5)
Window& Window::SetOpacity(float opacity) {
if (SDL_SetWindowOpacity(window_, opacity))
throw SDL2pp::Exception("SDL_SetWindowOpacity");
return *this;
}
float Window::GetOpacity() const {
float opacity;
if (SDL_GetWindowOpacity(window_, &opacity) == -1)
throw SDL2pp::Exception("SDL_GetWindowOpacity");
return opacity;
}
#endif
}

25
SDL2pp/Window.hh
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@ -24,6 +24,7 @@
#include <string>
#include <SDL2/SDL_version.h>
#include <SDL2/SDL_stdinc.h>
#include <SDL2/SDL_video.h>
@ -534,6 +535,30 @@ public:
///
////////////////////////////////////////////////////////////
Window& SetBordered(bool bordered = true);
#if SDL_VERSION_ATLEAST(2, 0, 5)
////////////////////////////////////////////////////////////
/// \brief Set the opacity for a window
///
/// \param[in] opacity The opacity value (0.0f - transparent, 1.0f - opaque)
///
/// \returns Reference to self
///
/// \see http://wiki.libsdl.org/SDL_SetWindowOpacity
///
////////////////////////////////////////////////////////////
Window& SetOpacity(float opacity = 1.0f);
////////////////////////////////////////////////////////////
/// \brief Get the opacity of a window
///
/// \returns Opacity value (0.0f - transparent, 1.0f - opaque)
///
/// \see http://wiki.libsdl.org/SDL_GetWindowOpacity
///
////////////////////////////////////////////////////////////
float GetOpacity() const;
#endif
};
}

23
tests/live_window.cc
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@ -191,4 +191,27 @@ BEGIN_TEST(int, char*[])
EventSleep(1000);
}
#if SDL_VERSION_ATLEAST(2, 0, 5)
{
// Opacity
bool has_opacity = true;
try {
window.SetOpacity(0.5f);
} catch (...) {
has_opacity = false;
std::cerr << "Setting window opacity is not supported on this platform" << std::endl;
}
if (has_opacity) {
EXPECT_TRUE(window.GetOpacity() > 0.49f);
EXPECT_TRUE(window.GetOpacity() < 0.51f);
EventSleep(1000);
window.SetOpacity();
EXPECT_TRUE(window.GetOpacity() > 0.99f);
EventSleep(1000);
}
}
#endif
END_TEST()