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Xenia-Canary/src/xenia/ui/imgui_drawer.cc
Gliniak 45332299b2 [UI] Added played game list and achievements UI. 
This will be functional after GPD & SPA implementation, for now shows info about currently booted title
2024-12-14 18:18:35 +01:00

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/**
******************************************************************************
* Xenia : Xbox 360 Emulator Research Project *
******************************************************************************
* Copyright 2022 Ben Vanik. All rights reserved. *
* Released under the BSD license - see LICENSE in the root for more details. *
******************************************************************************
*/
#include "xenia/ui/imgui_drawer.h"
#include <cfloat>
#include <cstring>
#include "third_party/imgui/imgui.h"
#include "xenia/base/assert.h"
#include "xenia/base/clock.h"
#include "xenia/base/logging.h"
#include "xenia/base/math.h"
#include "xenia/ui/imgui_dialog.h"
#include "xenia/ui/imgui_notification.h"
#include "xenia/ui/resources.h"
#include "xenia/ui/ui_event.h"
#include "xenia/ui/window.h"
#define STB_IMAGE_IMPLEMENTATION
#include "third_party/stb/stb_image.h"
#if XE_PLATFORM_WIN32
#include <ShlObj_core.h>
#endif
DEFINE_path(
custom_font_path, "",
"Allows user to load custom font and use it instead of default one.", "UI");
DEFINE_uint32(font_size, 14, "Allows user to set custom font size.", "UI");
UPDATE_from_uint32(font_size, 2024, 8, 31, 20, 12);
namespace xe {
namespace ui {
// File: 'ProggyTiny.ttf' (35656 bytes)
// Exported using binary_to_compressed_c.cpp
const char kProggyTinyCompressedDataBase85[10950 + 1] =
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static_assert(sizeof(ImmediateVertex) == sizeof(ImDrawVert),
"Vertex types must match");
ImGuiDrawer::ImGuiDrawer(xe::ui::Window* window, size_t z_order)
: window_(window), z_order_(z_order) {
Initialize();
}
ImGuiDrawer::~ImGuiDrawer() {
SetPresenter(nullptr);
if (!dialogs_.empty()) {
window_->RemoveInputListener(this);
if (internal_state_) {
ImGui::SetCurrentContext(internal_state_);
if (touch_pointer_id_ == TouchEvent::kPointerIDNone &&
ImGui::IsAnyMouseDown()) {
window_->ReleaseMouse();
}
}
}
if (internal_state_) {
ImGui::DestroyContext(internal_state_);
internal_state_ = nullptr;
}
}
void ImGuiDrawer::AddDialog(ImGuiDialog* dialog) {
assert_not_null(dialog);
// Check if already added.
if (std::find(dialogs_.cbegin(), dialogs_.cend(), dialog) !=
dialogs_.cend()) {
return;
}
if (dialogs_.empty() && !IsDrawingDialogs()) {
// First dialog added. !IsDrawingDialogs() is also checked because in a
// situation of removing the only dialog, then adding a dialog, from within
// a dialog's Draw function, re-registering the ImGuiDrawer may result in
// ImGui being drawn multiple times in the current frame.
window_->AddInputListener(this, z_order_);
if (presenter_) {
presenter_->AddUIDrawerFromUIThread(this, z_order_);
}
}
dialogs_.push_back(dialog);
}
void ImGuiDrawer::RemoveDialog(ImGuiDialog* dialog) {
assert_not_null(dialog);
auto it = std::find(dialogs_.cbegin(), dialogs_.cend(), dialog);
if (it == dialogs_.cend()) {
return;
}
if (IsDrawingDialogs()) {
// Actualize the next dialog index after the erasure from the vector.
size_t existing_index = size_t(std::distance(dialogs_.cbegin(), it));
if (dialog_loop_next_index_ > existing_index) {
--dialog_loop_next_index_;
}
}
dialogs_.erase(it);
DetachIfLastWindowRemoved();
}
void ImGuiDrawer::AddNotification(ImGuiNotification* dialog) {
assert_not_null(dialog);
// Check if already added.
if (std::find(notifications_.cbegin(), notifications_.cend(), dialog) !=
notifications_.cend()) {
return;
}
if (notifications_.empty()) {
if (presenter_) {
presenter_->AddUIDrawerFromUIThread(this, z_order_);
}
}
notifications_.push_back(dialog);
}
void ImGuiDrawer::RemoveNotification(ImGuiNotification* dialog) {
assert_not_null(dialog);
auto it = std::find(notifications_.cbegin(), notifications_.cend(), dialog);
if (it == notifications_.cend()) {
return;
}
notifications_.erase(it);
DetachIfLastWindowRemoved();
}
void ImGuiDrawer::Initialize() {
// Setup ImGui internal state.
// This will give us state we can swap to the ImGui globals when in use.
internal_state_ = ImGui::CreateContext();
ImGui::SetCurrentContext(internal_state_);
const float font_size = std::max((float)cvars::font_size, 8.f);
const float title_font_size = font_size + 6.f;
InitializeFonts(font_size);
InitializeFonts(title_font_size);
auto& style = ImGui::GetStyle();
style.ScrollbarRounding = 6.0f;
style.WindowRounding = 6.0f;
style.PopupRounding = 6.0f;
style.TabRounding = 6.0f;
style.Colors[ImGuiCol_Text] = ImVec4(0.89f, 0.90f, 0.90f, 1.00f);
style.Colors[ImGuiCol_TextDisabled] = ImVec4(0.60f, 0.60f, 0.60f, 1.00f);
style.Colors[ImGuiCol_WindowBg] = ImVec4(0.00f, 0.06f, 0.00f, 1.00f);
style.Colors[ImGuiCol_ChildBg] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
style.Colors[ImGuiCol_Border] = ImVec4(0.00f, 0.35f, 0.00f, 1.00f);
style.Colors[ImGuiCol_BorderShadow] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
style.Colors[ImGuiCol_FrameBg] = ImVec4(0.80f, 0.80f, 0.80f, 0.30f);
style.Colors[ImGuiCol_FrameBgHovered] = ImVec4(0.90f, 0.80f, 0.80f, 0.40f);
style.Colors[ImGuiCol_FrameBgActive] = ImVec4(0.90f, 0.65f, 0.65f, 0.45f);
style.Colors[ImGuiCol_TitleBg] = ImVec4(0.00f, 0.40f, 0.00f, 1.00f);
style.Colors[ImGuiCol_TitleBgCollapsed] = ImVec4(0.00f, 0.33f, 0.00f, 1.00f);
style.Colors[ImGuiCol_TitleBgActive] = ImVec4(0.16f, 0.65f, 0.00f, 1.00f);
style.Colors[ImGuiCol_MenuBarBg] = ImVec4(0.00f, 0.35f, 0.00f, 1.00f);
style.Colors[ImGuiCol_ScrollbarBg] = ImVec4(0.00f, 0.40f, 0.11f, 0.59f);
style.Colors[ImGuiCol_ScrollbarGrab] = ImVec4(0.00f, 0.68f, 0.00f, 0.68f);
style.Colors[ImGuiCol_ScrollbarGrabHovered] =
ImVec4(0.00f, 1.00f, 0.15f, 0.62f);
style.Colors[ImGuiCol_ScrollbarGrabActive] =
ImVec4(0.00f, 0.91f, 0.09f, 0.40f);
style.Colors[ImGuiCol_PopupBg] = ImVec4(0.20f, 0.20f, 0.20f, 0.99f);
style.Colors[ImGuiCol_CheckMark] = ImVec4(0.74f, 0.90f, 0.72f, 0.50f);
style.Colors[ImGuiCol_SliderGrab] = ImVec4(1.00f, 1.00f, 1.00f, 0.30f);
style.Colors[ImGuiCol_SliderGrabActive] = ImVec4(0.34f, 0.75f, 0.11f, 1.00f);
style.Colors[ImGuiCol_Button] = ImVec4(0.15f, 0.56f, 0.11f, 0.60f);
style.Colors[ImGuiCol_ButtonHovered] = ImVec4(0.19f, 0.72f, 0.09f, 1.00f);
style.Colors[ImGuiCol_ButtonActive] = ImVec4(0.19f, 0.60f, 0.09f, 1.00f);
style.Colors[ImGuiCol_Header] = ImVec4(0.00f, 0.40f, 0.00f, 0.71f);
style.Colors[ImGuiCol_HeaderHovered] = ImVec4(0.00f, 0.60f, 0.26f, 0.80f);
style.Colors[ImGuiCol_HeaderActive] = ImVec4(0.00f, 0.75f, 0.00f, 0.80f);
style.Colors[ImGuiCol_Separator] = ImVec4(0.00f, 0.35f, 0.00f, 1.00f);
style.Colors[ImGuiCol_SeparatorHovered] = ImVec4(0.36f, 0.89f, 0.38f, 1.00f);
style.Colors[ImGuiCol_SeparatorActive] = ImVec4(0.13f, 0.50f, 0.11f, 1.00f);
style.Colors[ImGuiCol_ResizeGrip] = ImVec4(1.00f, 1.00f, 1.00f, 0.30f);
style.Colors[ImGuiCol_ResizeGripHovered] = ImVec4(1.00f, 1.00f, 1.00f, 0.60f);
style.Colors[ImGuiCol_ResizeGripActive] = ImVec4(1.00f, 1.00f, 1.00f, 0.90f);
style.Colors[ImGuiCol_Tab] = style.Colors[ImGuiCol_Button];
style.Colors[ImGuiCol_TabHovered] = style.Colors[ImGuiCol_ButtonHovered];
style.Colors[ImGuiCol_TabActive] = style.Colors[ImGuiCol_ButtonActive];
style.Colors[ImGuiCol_TabUnfocused] = style.Colors[ImGuiCol_FrameBg];
style.Colors[ImGuiCol_TabUnfocusedActive] =
style.Colors[ImGuiCol_FrameBgHovered];
style.Colors[ImGuiCol_PlotLines] = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
style.Colors[ImGuiCol_PlotLinesHovered] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
style.Colors[ImGuiCol_PlotHistogram] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
style.Colors[ImGuiCol_PlotHistogramHovered] =
ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
style.Colors[ImGuiCol_TextSelectedBg] = ImVec4(0.00f, 1.00f, 0.00f, 0.21f);
style.Colors[ImGuiCol_ModalWindowDimBg] = ImVec4(0.20f, 0.20f, 0.20f, 0.35f);
frame_time_tick_frequency_ = double(Clock::QueryHostTickFrequency());
last_frame_time_ticks_ = Clock::QueryHostTickCount();
touch_pointer_id_ = TouchEvent::kPointerIDNone;
reset_mouse_position_after_next_frame_ = false;
}
std::optional<ImGuiKey> ImGuiDrawer::VirtualKeyToImGuiKey(VirtualKey vkey) {
static const std::map<VirtualKey, ImGuiKey> map = {
{ui::VirtualKey::kTab, ImGuiKey_Tab},
{ui::VirtualKey::kLeft, ImGuiKey_LeftArrow},
{ui::VirtualKey::kRight, ImGuiKey_RightArrow},
{ui::VirtualKey::kUp, ImGuiKey_UpArrow},
{ui::VirtualKey::kDown, ImGuiKey_DownArrow},
{ui::VirtualKey::kHome, ImGuiKey_Home},
{ui::VirtualKey::kEnd, ImGuiKey_End},
{ui::VirtualKey::kDelete, ImGuiKey_Delete},
{ui::VirtualKey::kBack, ImGuiKey_Backspace},
{ui::VirtualKey::kReturn, ImGuiKey_Enter},
{ui::VirtualKey::kEscape, ImGuiKey_Escape},
{ui::VirtualKey::kA, ImGuiKey_A},
{ui::VirtualKey::kC, ImGuiKey_C},
{ui::VirtualKey::kV, ImGuiKey_V},
{ui::VirtualKey::kX, ImGuiKey_X},
{ui::VirtualKey::kY, ImGuiKey_Y},
{ui::VirtualKey::kZ, ImGuiKey_Z},
};
if (auto search = map.find(vkey); search != map.end()) {
return search->second;
} else {
return std::nullopt;
}
}
std::map<uint32_t, std::unique_ptr<ImmediateTexture>> ImGuiDrawer::LoadIcons(
IconsData data) {
std::map<uint32_t, std::unique_ptr<ImmediateTexture>> icons_;
if (!immediate_drawer_) {
return icons_;
}
int width, height, channels;
for (const auto& icon : data) {
unsigned char* image_data =
stbi_load_from_memory(icon.second.first, icon.second.second, &width,
&height, &channels, STBI_rgb_alpha);
icons_[icon.first] = (immediate_drawer_->CreateTexture(
width, height, ImmediateTextureFilter::kLinear, true,
reinterpret_cast<uint8_t*>(image_data)));
}
return icons_;
}
void ImGuiDrawer::SetupNotificationTextures() {
if (!immediate_drawer_) {
return;
}
// We're including 4th to include all visible
for (uint8_t i = 0; i <= 4; i++) {
if (notification_icons.size() < i) {
break;
}
unsigned char* image_data;
int width, height, channels;
const auto user_icon = notification_icons.at(i);
image_data =
stbi_load_from_memory(user_icon.first, user_icon.second, &width,
&height, &channels, STBI_rgb_alpha);
notification_icon_textures_.push_back(immediate_drawer_->CreateTexture(
width, height, ImmediateTextureFilter::kLinear, true,
reinterpret_cast<uint8_t*>(image_data)));
}
}
static const ImWchar font_glyph_ranges[] = {
0x0020, 0x00FF, // Basic Latin + Latin Supplement
0x0370, 0x03FF, // Greek
0x0400, 0x04FF, // Cyrillic
0x2000, 0x206F, // General Punctuation
0,
};
bool ImGuiDrawer::LoadCustomFont(ImGuiIO& io, ImFontConfig& font_config,
float font_size) {
if (cvars::custom_font_path.empty()) {
return false;
}
if (!std::filesystem::exists(cvars::custom_font_path)) {
return false;
}
const std::string font_path = xe::path_to_utf8(cvars::custom_font_path);
ImFont* font = io.Fonts->AddFontFromFileTTF(font_path.c_str(), font_size,
&font_config, font_glyph_ranges);
io.Fonts->Build();
if (!font->IsLoaded()) {
XELOGE("Failed to load custom font: {}", font_path);
io.Fonts->Clear();
return false;
}
return true;
}
bool ImGuiDrawer::LoadWindowsFont(ImGuiIO& io, ImFontConfig& font_config,
float font_size) {
#if XE_PLATFORM_WIN32
PWSTR fonts_dir;
HRESULT result = SHGetKnownFolderPath(FOLDERID_Fonts, 0, NULL, &fonts_dir);
if (FAILED(result)) {
CoTaskMemFree(static_cast<void*>(fonts_dir));
XELOGW("Unable to find Windows fonts directory");
return false;
}
std::filesystem::path font_path = std::wstring(fonts_dir);
font_path.append("tahoma.ttf");
if (!std::filesystem::exists(font_path)) {
return false;
}
ImFont* font =
io.Fonts->AddFontFromFileTTF(xe::path_to_utf8(font_path).c_str(),
font_size, &font_config, font_glyph_ranges);
io.Fonts->Build();
// Something went wrong while loading custom font. Probably corrupted.
if (!font->IsLoaded()) {
XELOGE("Failed to load custom font: {}", font_path);
io.Fonts->Clear();
}
CoTaskMemFree(static_cast<void*>(fonts_dir));
return true;
#endif
return false;
}
bool ImGuiDrawer::LoadJapaneseFont(ImGuiIO& io, float font_size) {
// TODO(benvanik): jp font on other platforms?
#if XE_PLATFORM_WIN32
PWSTR fonts_dir;
HRESULT result = SHGetKnownFolderPath(FOLDERID_Fonts, 0, NULL, &fonts_dir);
if (FAILED(result)) {
XELOGW("Unable to find Windows fonts directory");
return false;
}
std::filesystem::path jp_font_path = std::wstring(fonts_dir);
jp_font_path.append("msgothic.ttc");
if (std::filesystem::exists(jp_font_path)) {
ImFontConfig jp_font_config;
jp_font_config.MergeMode = true;
jp_font_config.OversampleH = jp_font_config.OversampleV = 2;
jp_font_config.PixelSnapH = true;
jp_font_config.FontNo = 0;
io.Fonts->AddFontFromFileTTF(xe::path_to_utf8(jp_font_path).c_str(),
font_size, &jp_font_config,
io.Fonts->GetGlyphRangesJapanese());
} else {
XELOGW("Unable to load Japanese font; JP characters will be boxes");
}
CoTaskMemFree(static_cast<void*>(fonts_dir));
return true;
#endif
return false;
};
void ImGuiDrawer::InitializeFonts(const float font_size) {
auto& io = ImGui::GetIO();
// TODO(gibbed): disable imgui.ini saving for now,
// imgui assumes paths are char* so we can't throw a good path at it on
// Windows.
io.IniFilename = nullptr;
ImFontConfig font_config;
font_config.OversampleH = font_config.OversampleV = 2;
font_config.PixelSnapH = true;
bool is_font_loaded = LoadCustomFont(io, font_config, font_size);
if (!is_font_loaded) {
is_font_loaded = LoadWindowsFont(io, font_config, font_size);
}
if (io.Fonts->Fonts.empty()) {
io.Fonts->AddFontFromMemoryCompressedBase85TTF(
kProggyTinyCompressedDataBase85, font_size, &font_config,
io.Fonts->GetGlyphRangesDefault());
}
LoadJapaneseFont(io, font_size);
}
void ImGuiDrawer::SetupFontTexture() {
if (font_texture_ || !immediate_drawer_) {
return;
}
ImGuiIO& io = GetIO();
unsigned char* pixels;
int width, height;
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
font_texture_ = immediate_drawer_->CreateTexture(
width, height, ImmediateTextureFilter::kLinear, true,
reinterpret_cast<uint8_t*>(pixels));
io.Fonts->TexID = reinterpret_cast<ImTextureID>(font_texture_.get());
}
void ImGuiDrawer::SetPresenter(Presenter* new_presenter) {
if (presenter_) {
if (presenter_ == new_presenter) {
return;
}
if (!dialogs_.empty()) {
presenter_->RemoveUIDrawerFromUIThread(this);
}
ImGuiIO& io = GetIO();
}
presenter_ = new_presenter;
if (presenter_) {
if (!dialogs_.empty()) {
presenter_->AddUIDrawerFromUIThread(this, z_order_);
}
}
}
void ImGuiDrawer::SetImmediateDrawer(ImmediateDrawer* new_immediate_drawer) {
if (immediate_drawer_ == new_immediate_drawer) {
return;
}
if (immediate_drawer_) {
GetIO().Fonts->TexID = static_cast<ImTextureID>(nullptr);
font_texture_.reset();
notification_icon_textures_.clear();
}
immediate_drawer_ = new_immediate_drawer;
if (immediate_drawer_) {
SetupFontTexture();
SetupNotificationTextures();
// Load locked achievement icon.
unsigned char* image_data;
int width, height, channels;
image_data = stbi_load_from_memory(locked_achievement_icon.first,
locked_achievement_icon.second, &width,
&height, &channels, STBI_rgb_alpha);
locked_achievement_icon_ = immediate_drawer_->CreateTexture(
width, height, ImmediateTextureFilter::kLinear, true,
reinterpret_cast<uint8_t*>(image_data));
}
}
void ImGuiDrawer::Draw(UIDrawContext& ui_draw_context) {
// Drawing of anything is initiated by the presenter.
assert_not_null(presenter_);
if (!immediate_drawer_) {
// A presenter has been attached, but an immediate drawer hasn't been
// attached yet.
return;
}
if (dialogs_.empty() && notifications_.empty()) {
return;
}
ImGui::SetCurrentContext(internal_state_);
ImGuiIO& io = ImGui::GetIO();
uint64_t current_frame_time_ticks = Clock::QueryHostTickCount();
io.DeltaTime =
float(double(current_frame_time_ticks - last_frame_time_ticks_) /
frame_time_tick_frequency_);
if (!(io.DeltaTime > 0.0f) ||
current_frame_time_ticks < last_frame_time_ticks_) {
// For safety as Dear ImGui doesn't allow non-positive DeltaTime. Using the
// same default value as in the official samples.
io.DeltaTime = 1.0f / 60.0f;
}
last_frame_time_ticks_ = current_frame_time_ticks;
float physical_to_logical =
float(window_->GetMediumDpi()) / float(window_->GetDpi());
io.DisplaySize.x = window_->GetActualPhysicalWidth() * physical_to_logical;
io.DisplaySize.y = window_->GetActualPhysicalHeight() * physical_to_logical;
ImGui::NewFrame();
assert_true(!IsDrawingDialogs());
dialog_loop_next_index_ = 0;
while (dialog_loop_next_index_ < dialogs_.size()) {
dialogs_[dialog_loop_next_index_++]->Draw();
}
dialog_loop_next_index_ = SIZE_MAX;
if (!notifications_.empty()) {
std::vector<ui::ImGuiNotification*> guest_notifications = {};
std::vector<ui::ImGuiNotification*> host_notifications = {};
std::copy_if(notifications_.cbegin(), notifications_.cend(),
std::back_inserter(guest_notifications),
[](ui::ImGuiNotification* notification) {
return notification->GetNotificationType() ==
NotificationType::Guest;
});
std::copy_if(notifications_.cbegin(), notifications_.cend(),
std::back_inserter(host_notifications),
[](ui::ImGuiNotification* notification) {
return notification->GetNotificationType() ==
NotificationType::Host;
});
if (guest_notifications.size() > 0) {
guest_notifications.at(0)->Draw();
}
if (host_notifications.size() > 0) {
host_notifications.at(0)->Draw();
if (host_notifications.size() > 1) {
host_notifications.at(0)->SetDeletionPending();
}
}
}
ImGui::Render();
ImDrawData* draw_data = ImGui::GetDrawData();
if (draw_data) {
RenderDrawLists(draw_data, ui_draw_context);
}
if (reset_mouse_position_after_next_frame_) {
reset_mouse_position_after_next_frame_ = false;
io.MousePos = ImVec2(-FLT_MAX, -FLT_MAX);
}
// Detaching is deferred if the last dialog is removed during drawing, perform
// it now if needed.
DetachIfLastWindowRemoved();
if (!dialogs_.empty() || !notifications_.empty()) {
// Repaint (and handle input) continuously if still active.
presenter_->RequestUIPaintFromUIThread();
}
}
void ImGuiDrawer::ClearDialogs() {
size_t dialog_loop = 0;
while (dialog_loop < dialogs_.size()) {
RemoveDialog(dialogs_[dialog_loop++]);
}
}
void ImGuiDrawer::RenderDrawLists(ImDrawData* data,
UIDrawContext& ui_draw_context) {
ImGuiIO& io = ImGui::GetIO();
immediate_drawer_->Begin(ui_draw_context, io.DisplaySize.x, io.DisplaySize.y);
for (int i = 0; i < data->CmdListsCount; ++i) {
const auto cmd_list = data->CmdLists[i];
ImmediateDrawBatch batch;
batch.vertices =
reinterpret_cast<ImmediateVertex*>(cmd_list->VtxBuffer.Data);
batch.vertex_count = cmd_list->VtxBuffer.size();
batch.indices = cmd_list->IdxBuffer.Data;
batch.index_count = cmd_list->IdxBuffer.size();
immediate_drawer_->BeginDrawBatch(batch);
for (int j = 0; j < cmd_list->CmdBuffer.size(); ++j) {
const auto& cmd = cmd_list->CmdBuffer[j];
ImmediateDraw draw;
draw.primitive_type = ImmediatePrimitiveType::kTriangles;
draw.count = cmd.ElemCount;
draw.index_offset = cmd.IdxOffset;
draw.texture = reinterpret_cast<ImmediateTexture*>(cmd.TextureId);
draw.scissor = true;
draw.scissor_left = cmd.ClipRect.x;
draw.scissor_top = cmd.ClipRect.y;
draw.scissor_right = cmd.ClipRect.z;
draw.scissor_bottom = cmd.ClipRect.w;
immediate_drawer_->Draw(draw);
}
immediate_drawer_->EndDrawBatch();
}
immediate_drawer_->End();
}
ImGuiIO& ImGuiDrawer::GetIO() {
ImGui::SetCurrentContext(internal_state_);
return ImGui::GetIO();
}
void ImGuiDrawer::OnKeyDown(KeyEvent& e) { OnKey(e, true); }
void ImGuiDrawer::OnKeyUp(KeyEvent& e) { OnKey(e, false); }
void ImGuiDrawer::OnKeyChar(KeyEvent& e) {
auto& io = GetIO();
// TODO(Triang3l): Accept the Unicode character.
unsigned int character = static_cast<unsigned int>(e.virtual_key());
if (character > 0 && character < 0x10000) {
io.AddInputCharacter(character);
e.set_handled(true);
}
}
void ImGuiDrawer::OnMouseDown(MouseEvent& e) {
SwitchToPhysicalMouseAndUpdateMousePosition(e);
auto& io = GetIO();
int button = -1;
switch (e.button()) {
case xe::ui::MouseEvent::Button::kLeft: {
button = 0;
break;
}
case xe::ui::MouseEvent::Button::kRight: {
button = 1;
break;
}
default: {
// Ignored.
break;
}
}
if (button >= 0 && button < std::size(io.MouseDown)) {
if (!io.MouseDown[button]) {
if (!ImGui::IsAnyMouseDown()) {
window_->CaptureMouse();
}
io.MouseDown[button] = true;
}
}
}
void ImGuiDrawer::OnMouseMove(MouseEvent& e) {
SwitchToPhysicalMouseAndUpdateMousePosition(e);
}
void ImGuiDrawer::OnMouseUp(MouseEvent& e) {
SwitchToPhysicalMouseAndUpdateMousePosition(e);
auto& io = GetIO();
int button = -1;
switch (e.button()) {
case xe::ui::MouseEvent::Button::kLeft: {
button = 0;
break;
}
case xe::ui::MouseEvent::Button::kRight: {
button = 1;
break;
}
default: {
// Ignored.
break;
}
}
if (button >= 0 && button < std::size(io.MouseDown)) {
if (io.MouseDown[button]) {
io.MouseDown[button] = false;
if (!ImGui::IsAnyMouseDown()) {
window_->ReleaseMouse();
}
}
}
}
void ImGuiDrawer::OnMouseWheel(MouseEvent& e) {
SwitchToPhysicalMouseAndUpdateMousePosition(e);
auto& io = GetIO();
io.MouseWheel += float(e.scroll_y()) / float(MouseEvent::kScrollPerDetent);
}
void ImGuiDrawer::OnTouchEvent(TouchEvent& e) {
auto& io = GetIO();
TouchEvent::Action action = e.action();
uint32_t pointer_id = e.pointer_id();
if (action == TouchEvent::Action::kDown) {
// The latest pointer needs to be controlling the ImGui mouse.
if (touch_pointer_id_ == TouchEvent::kPointerIDNone) {
// Switching from the mouse to touch input.
if (ImGui::IsAnyMouseDown()) {
std::memset(io.MouseDown, 0, sizeof(io.MouseDown));
window_->ReleaseMouse();
}
}
touch_pointer_id_ = pointer_id;
} else {
if (pointer_id != touch_pointer_id_) {
return;
}
}
UpdateMousePosition(e.x(), e.y());
if (action == TouchEvent::Action::kUp ||
action == TouchEvent::Action::kCancel) {
io.MouseDown[0] = false;
touch_pointer_id_ = TouchEvent::kPointerIDNone;
// Make sure that after a touch, the ImGui mouse isn't hovering over
// anything.
reset_mouse_position_after_next_frame_ = true;
} else {
io.MouseDown[0] = true;
reset_mouse_position_after_next_frame_ = false;
}
}
void ImGuiDrawer::ClearInput() {
auto& io = GetIO();
if (touch_pointer_id_ == TouchEvent::kPointerIDNone &&
ImGui::IsAnyMouseDown()) {
window_->ReleaseMouse();
}
io.MousePos = ImVec2(-FLT_MAX, -FLT_MAX);
std::memset(io.MouseDown, 0, sizeof(io.MouseDown));
io.ClearInputKeys();
io.ClearInputCharacters();
touch_pointer_id_ = TouchEvent::kPointerIDNone;
reset_mouse_position_after_next_frame_ = false;
}
void ImGuiDrawer::OnKey(KeyEvent& e, bool is_down) {
auto& io = GetIO();
const VirtualKey virtual_key = e.virtual_key();
if (auto imGuiKey = VirtualKeyToImGuiKey(virtual_key); imGuiKey) {
io.AddKeyEvent(*imGuiKey, is_down);
}
switch (virtual_key) {
case VirtualKey::kShift:
io.KeyShift = is_down;
break;
case VirtualKey::kControl:
io.KeyCtrl = is_down;
break;
case VirtualKey::kMenu:
// FIXME(Triang3l): Doesn't work in xenia-ui-window-demo.
io.KeyAlt = is_down;
break;
case VirtualKey::kLWin:
io.KeySuper = is_down;
break;
default:
break;
}
}
void ImGuiDrawer::UpdateMousePosition(float x, float y) {
auto& io = GetIO();
float physical_to_logical =
float(window_->GetMediumDpi()) / float(window_->GetDpi());
io.MousePos.x = x * physical_to_logical;
io.MousePos.y = y * physical_to_logical;
}
void ImGuiDrawer::SwitchToPhysicalMouseAndUpdateMousePosition(
const MouseEvent& e) {
if (touch_pointer_id_ != TouchEvent::kPointerIDNone) {
touch_pointer_id_ = TouchEvent::kPointerIDNone;
auto& io = GetIO();
std::memset(io.MouseDown, 0, sizeof(io.MouseDown));
// Nothing needs to be done regarding CaptureMouse and ReleaseMouse - all
// buttons as well as mouse capture have been released when switching to
// touch input, the mouse is never captured during touch input, and now
// resetting to no buttons down (therefore not capturing).
}
reset_mouse_position_after_next_frame_ = false;
UpdateMousePosition(float(e.x()), float(e.y()));
}
void ImGuiDrawer::DetachIfLastWindowRemoved() {
// IsDrawingDialogs() is also checked because in a situation of removing the
// only dialog, then adding a dialog, from within a dialog's Draw function,
// re-registering the ImGuiDrawer may result in ImGui being drawn multiple
// times in the current frame.
if (!dialogs_.empty() || !notifications_.empty() || IsDrawingDialogs()) {
return;
}
if (presenter_) {
presenter_->RemoveUIDrawerFromUIThread(this);
}
window_->RemoveInputListener(this);
// Clear all input since no input will be received anymore, and when the
// drawer becomes active again, it'd have an outdated input state otherwise
// which will be persistent until new events actualize individual input
// properties.
ClearInput();
}
} // namespace ui
} // namespace xe
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