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Examples: DirectX9/10/11: Tweak usage of SetCapture/ReleaseCapture. (#1375)

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ps: DirectX 12 example (#302) may want to adopt that as well.
This commit is contained in:
omar 2017-10-24 14:48:00 +02:00
parent 0260fdd1c6
commit d2c65aa3e8
3 changed files with 57 additions and 49 deletions
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35
examples/directx10_example/imgui_impl_dx10.cpp
View File

@ -234,35 +234,38 @@ static bool IsAnyMouseButtonDown()
return false; return false;
} }
// We use the Win32 capture API (GetCapture/SetCapture/ReleaseCapture) to be able to read mouse coordinations when dragging mouse outside of our window bounds.
IMGUI_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) IMGUI_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{ {
ImGuiIO& io = ImGui::GetIO(); ImGuiIO& io = ImGui::GetIO();
switch (msg) switch (msg)
{ {
case WM_LBUTTONDOWN: case WM_LBUTTONDOWN:
if (!IsAnyMouseButtonDown()) ::SetCapture(hwnd);
io.MouseDown[0] = true;
return 0;
case WM_RBUTTONDOWN: case WM_RBUTTONDOWN:
if (!IsAnyMouseButtonDown()) ::SetCapture(hwnd);
io.MouseDown[1] = true;
return 0;
case WM_MBUTTONDOWN: case WM_MBUTTONDOWN:
if (!IsAnyMouseButtonDown()) ::SetCapture(hwnd); {
io.MouseDown[2] = true; int button = 0;
if (msg == WM_LBUTTONDOWN) button = 0;
if (msg == WM_RBUTTONDOWN) button = 1;
if (msg == WM_MBUTTONDOWN) button = 2;
if (!IsAnyMouseButtonDown() && GetCapture() == NULL)
SetCapture(hwnd);
io.MouseDown[button] = true;
return 0; return 0;
}
case WM_LBUTTONUP: case WM_LBUTTONUP:
io.MouseDown[0] = false;
if (!IsAnyMouseButtonDown()) ::ReleaseCapture();
return 0;
case WM_RBUTTONUP: case WM_RBUTTONUP:
io.MouseDown[1] = false;
if (!IsAnyMouseButtonDown()) ::ReleaseCapture();
return 0;
case WM_MBUTTONUP: case WM_MBUTTONUP:
io.MouseDown[2] = false; {
if (!IsAnyMouseButtonDown()) ::ReleaseCapture(); int button = 0;
if (msg == WM_LBUTTONUP) button = 0;
if (msg == WM_RBUTTONUP) button = 1;
if (msg == WM_MBUTTONUP) button = 2;
io.MouseDown[button] = false;
if (!IsAnyMouseButtonDown() && GetCapture() == hwnd)
ReleaseCapture();
return 0; return 0;
}
case WM_MOUSEWHEEL: case WM_MOUSEWHEEL:
io.MouseWheel += GET_WHEEL_DELTA_WPARAM(wParam) > 0 ? +1.0f : -1.0f; io.MouseWheel += GET_WHEEL_DELTA_WPARAM(wParam) > 0 ? +1.0f : -1.0f;
return 0; return 0;

35
examples/directx11_example/imgui_impl_dx11.cpp
View File

@ -241,35 +241,38 @@ static bool IsAnyMouseButtonDown()
return false; return false;
} }
// We use the Win32 capture API (GetCapture/SetCapture/ReleaseCapture) to be able to read mouse coordinations when dragging mouse outside of our window bounds.
IMGUI_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) IMGUI_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{ {
ImGuiIO& io = ImGui::GetIO(); ImGuiIO& io = ImGui::GetIO();
switch (msg) switch (msg)
{ {
case WM_LBUTTONDOWN: case WM_LBUTTONDOWN:
if (!IsAnyMouseButtonDown()) ::SetCapture(hwnd);
io.MouseDown[0] = true;
return 0;
case WM_RBUTTONDOWN: case WM_RBUTTONDOWN:
if (!IsAnyMouseButtonDown()) ::SetCapture(hwnd);
io.MouseDown[1] = true;
return 0;
case WM_MBUTTONDOWN: case WM_MBUTTONDOWN:
if (!IsAnyMouseButtonDown()) ::SetCapture(hwnd); {
io.MouseDown[2] = true; int button = 0;
if (msg == WM_LBUTTONDOWN) button = 0;
if (msg == WM_RBUTTONDOWN) button = 1;
if (msg == WM_MBUTTONDOWN) button = 2;
if (!IsAnyMouseButtonDown() && GetCapture() == NULL)
SetCapture(hwnd);
io.MouseDown[button] = true;
return 0; return 0;
}
case WM_LBUTTONUP: case WM_LBUTTONUP:
io.MouseDown[0] = false;
if (!IsAnyMouseButtonDown()) ::ReleaseCapture();
return 0;
case WM_RBUTTONUP: case WM_RBUTTONUP:
io.MouseDown[1] = false;
if (!IsAnyMouseButtonDown()) ::ReleaseCapture();
return 0;
case WM_MBUTTONUP: case WM_MBUTTONUP:
io.MouseDown[2] = false; {
if (!IsAnyMouseButtonDown()) ::ReleaseCapture(); int button = 0;
if (msg == WM_LBUTTONUP) button = 0;
if (msg == WM_RBUTTONUP) button = 1;
if (msg == WM_MBUTTONUP) button = 2;
io.MouseDown[button] = false;
if (!IsAnyMouseButtonDown() && GetCapture() == hwnd)
ReleaseCapture();
return 0; return 0;
}
case WM_MOUSEWHEEL: case WM_MOUSEWHEEL:
io.MouseWheel += GET_WHEEL_DELTA_WPARAM(wParam) > 0 ? +1.0f : -1.0f; io.MouseWheel += GET_WHEEL_DELTA_WPARAM(wParam) > 0 ? +1.0f : -1.0f;
return 0; return 0;

36
examples/directx9_example/imgui_impl_dx9.cpp
View File

@ -180,36 +180,38 @@ static bool IsAnyMouseButtonDown()
return false; return false;
} }
// We use Win32 SetCapture/ReleaseCapture() API to enable reading the mouse outside our Windows bounds. // We use the Win32 capture API (GetCapture/SetCapture/ReleaseCapture) to be able to read mouse coordinations when dragging mouse outside of our window bounds.
IMGUI_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) IMGUI_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{ {
ImGuiIO& io = ImGui::GetIO(); ImGuiIO& io = ImGui::GetIO();
switch (msg) switch (msg)
{ {
case WM_LBUTTONDOWN: case WM_LBUTTONDOWN:
if (!IsAnyMouseButtonDown()) ::SetCapture(hwnd);
io.MouseDown[0] = true;
return 0;
case WM_RBUTTONDOWN: case WM_RBUTTONDOWN:
if (!IsAnyMouseButtonDown()) ::SetCapture(hwnd);
io.MouseDown[1] = true;
return 0;
case WM_MBUTTONDOWN: case WM_MBUTTONDOWN:
if (!IsAnyMouseButtonDown()) ::SetCapture(hwnd); {
io.MouseDown[2] = true; int button = 0;
if (msg == WM_LBUTTONDOWN) button = 0;
if (msg == WM_RBUTTONDOWN) button = 1;
if (msg == WM_MBUTTONDOWN) button = 2;
if (!IsAnyMouseButtonDown() && GetCapture() == NULL)
SetCapture(hwnd);
io.MouseDown[button] = true;
return 0; return 0;
}
case WM_LBUTTONUP: case WM_LBUTTONUP:
io.MouseDown[0] = false;
if (!IsAnyMouseButtonDown()) ::ReleaseCapture();
return 0;
case WM_RBUTTONUP: case WM_RBUTTONUP:
io.MouseDown[1] = false;
if (!IsAnyMouseButtonDown()) ::ReleaseCapture();
return 0;
case WM_MBUTTONUP: case WM_MBUTTONUP:
io.MouseDown[2] = false; {
if (!IsAnyMouseButtonDown()) ::ReleaseCapture(); int button = 0;
if (msg == WM_LBUTTONUP) button = 0;
if (msg == WM_RBUTTONUP) button = 1;
if (msg == WM_MBUTTONUP) button = 2;
io.MouseDown[button] = false;
if (!IsAnyMouseButtonDown() && GetCapture() == hwnd)
ReleaseCapture();
return 0; return 0;
}
case WM_MOUSEWHEEL: case WM_MOUSEWHEEL:
io.MouseWheel += GET_WHEEL_DELTA_WPARAM(wParam) > 0 ? +1.0f : -1.0f; io.MouseWheel += GET_WHEEL_DELTA_WPARAM(wParam) > 0 ? +1.0f : -1.0f;
return 0; return 0;