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feat: 创建一个 ImGUI backend 供 Magpie 使用

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相比 win32 backend 相比主要的变化是光标位置的映射
This commit is contained in:
刘旭 2022-02-14 16:41:12 +08:00
commit bdc4088d59
11 changed files with 219 additions and 27 deletions
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39
Runtime/UIDrawer.cpp
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@ -3,8 +3,11 @@
#include "App.h"
#include "DeviceResources.h"
#include <imgui.h>
#include "imgui/backends/imgui_impl_win32.h"
#include "imgui/backends/imgui_impl_dx11.h"
#include "imgui_impl_magpie.h"
#include "imgui_impl_dx11.h"
#include "Renderer.h"
#include "CursorDrawer.h"
UIDrawer::~UIDrawer() {
@ -13,7 +16,7 @@ UIDrawer::~UIDrawer() {
}
ImGui_ImplDX11_Shutdown();
ImGui_ImplWin32_Shutdown();
ImGui_ImplMagpie_Shutdown();
ImGui::DestroyContext();
}
@ -22,11 +25,13 @@ bool UIDrawer::Initialize(ID3D11Texture2D* renderTarget) {
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO();
io.ConfigFlags |= ImGuiConfigFlags_NavNoCaptureKeyboard | ImGuiConfigFlags_NoMouseCursorChange;
ImGui::StyleColorsDark();
ImGui_ImplWin32_Init(App::GetInstance().GetHwndHost());
ImGui_ImplMagpie_Init(App::GetInstance().GetHwndHost());
ImGui_ImplDX11_Init(dr.GetD3DDevice(), dr.GetD3DDC());
dr.GetRenderTargetView(renderTarget, &_rtv);
@ -37,10 +42,30 @@ bool UIDrawer::Initialize(ID3D11Texture2D* renderTarget) {
}
void UIDrawer::Draw() {
ImGui_ImplWin32_NewFrame();
auto& io = ImGui::GetIO();
ImGui_ImplMagpie_NewFrame();
ImGui_ImplDX11_NewFrame();
ImGui::NewFrame();
if (io.WantCaptureMouse) {
if (!_cursorOnUI) {
HWND hwndHost = App::GetInstance().GetHwndHost();
LONG_PTR style = GetWindowLongPtr(hwndHost, GWL_EXSTYLE);
SetWindowLongPtr(hwndHost, GWL_EXSTYLE, style & ~WS_EX_TRANSPARENT);
_cursorOnUI = true;
}
} else {
if (_cursorOnUI) {
HWND hwndHost = App::GetInstance().GetHwndHost();
LONG_PTR style = GetWindowLongPtr(hwndHost, GWL_EXSTYLE);
SetWindowLongPtr(hwndHost, GWL_EXSTYLE, style | WS_EX_TRANSPARENT);
_cursorOnUI = false;
}
}
bool show = true;
ImGui::ShowDemoWindow(&show);
@ -52,9 +77,7 @@ void UIDrawer::Draw() {
ImGui_ImplDX11_RenderDrawData(ImGui::GetDrawData());
}
extern IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
bool UIDrawer::_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) {
ImGui_ImplWin32_WndProcHandler(hWnd, msg, wParam, lParam);
ImGui_ImplMagpie_WndProcHandler(hWnd, msg, wParam, lParam);
return false;
}