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nost: touch piano mode (#830)
## Link to GitHub Issue or related Pull Request, if one exists n/a ## Description of change Touch piano mode. Allows piano keys to be played with the touch screen. Since the touch screen is still needed for menu navigation (including during songs) a toggle switch is added so that the user can flip between navigation mode and piano mode. The touch targets are pixel-perfect. Don't let the game's piano animations fool you. ## Testing
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bicarus
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#include "nostalgia_touch_piano.h"
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#include <cmath>
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#include "external/imgui/imgui_internal.h"
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#include "games/nost/touch_mode.h"
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namespace overlay::windows {
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static constexpr float BUTTON_WIDTH = 144.f;
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static constexpr float BUTTON_HEIGHT = 40.f;
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static constexpr float WINDOW_PADDING = 4.f;
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static constexpr float EDGE_MARGIN = 4.f;
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static constexpr float PIANO_HEIGHT_RATIO = 0.08f;
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static constexpr float PIANO_LEFT_GAP = 11.f;
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static constexpr float PIANO_RIGHT_GAP = 10.f;
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static constexpr uint32_t PIANO_KEY_COUNT = 28;
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static constexpr ImU32 PIANO_KEY_COLOR = IM_COL32(255, 255, 255, 50);
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static constexpr ImU32 PIANO_KEY_ACTIVE_COLOR = IM_COL32(255, 48, 48, 160);
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static constexpr ImU32 PIANO_KEY_BORDER_COLOR = IM_COL32(0, 0, 0, 100);
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struct ButtonPalette {
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ImVec4 normal;
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ImVec4 hovered;
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ImVec4 active;
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};
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static const ButtonPalette NAV_MODE_PALETTE {
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ImVec4(0.10f, 0.45f, 0.28f, 0.72f),
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ImVec4(0.14f, 0.58f, 0.36f, 0.82f),
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ImVec4(0.08f, 0.34f, 0.21f, 0.90f),
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};
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static const ButtonPalette PIANO_MODE_PALETTE {
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ImVec4(0.15f, 0.32f, 0.62f, 0.72f),
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ImVec4(0.20f, 0.42f, 0.78f, 0.82f),
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ImVec4(0.10f, 0.24f, 0.50f, 0.90f),
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};
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static void draw_piano_keys(
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const ImVec2 &display_size,
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LONG client_width,
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uint32_t key_state) {
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if (display_size.x <= 0.f || display_size.y <= 0.f || client_width <= 0) {
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return;
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}
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// this is only a visual guide; native touch routing owns the actual input
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const float left_gap = PIANO_LEFT_GAP * display_size.x / client_width;
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const float right_gap = PIANO_RIGHT_GAP * display_size.x / client_width;
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const float piano_width = display_size.x - left_gap - right_gap;
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if (piano_width <= 0.f) {
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return;
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}
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const float key_width = piano_width / PIANO_KEY_COUNT;
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const float key_top = display_size.y * (1.f - PIANO_HEIGHT_RATIO);
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auto *draw_list = ImGui::GetBackgroundDrawList();
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for (uint32_t key = 0; key < PIANO_KEY_COUNT; key++) {
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const ImVec2 key_min(left_gap + key * key_width, key_top);
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const ImVec2 key_max(left_gap + (key + 1) * key_width, display_size.y);
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const bool active = (key_state & (UINT32_C(1) << key)) != 0;
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draw_list->AddRectFilled(
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key_min,
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key_max,
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active ? PIANO_KEY_ACTIVE_COLOR : PIANO_KEY_COLOR);
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draw_list->AddRect(key_min, key_max, PIANO_KEY_BORDER_COLOR);
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}
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}
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NostalgiaTouchPiano::NostalgiaTouchPiano(SpiceOverlay *overlay) : Window(overlay) {
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this->title = "Nostalgia Touch Piano";
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this->flags = ImGuiWindowFlags_NoTitleBar
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| ImGuiWindowFlags_NoResize
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| ImGuiWindowFlags_NoCollapse
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| ImGuiWindowFlags_NoMove
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| ImGuiWindowFlags_NoDocking
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| ImGuiWindowFlags_NoBackground
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| ImGuiWindowFlags_NoSavedSettings
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| ImGuiWindowFlags_NoNav
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| ImGuiWindowFlags_NoBringToFrontOnFocus;
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this->window_padding = overlay::apply_scaling_to_vector(WINDOW_PADDING, WINDOW_PADDING);
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this->set_active(true);
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}
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void NostalgiaTouchPiano::calculate_initial_window() {
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this->init_size = overlay::apply_scaling_to_vector(
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BUTTON_WIDTH + WINDOW_PADDING * 2,
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BUTTON_HEIGHT + WINDOW_PADDING * 2);
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this->init_pos = overlay::apply_scaling_to_vector(EDGE_MARGIN, EDGE_MARGIN);
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}
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void NostalgiaTouchPiano::build_content() {
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// keep the control anchored while the game window changes size or mode
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ImGui::SetWindowPos(
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overlay::apply_scaling_to_vector(EDGE_MARGIN, EDGE_MARGIN),
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ImGuiCond_Always);
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// stay above regular overlay windows, but never cover a blocking modal
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ImGuiWindow *mode_window = ImGui::GetCurrentWindow();
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if (ImGuiWindow *modal = ImGui::GetTopMostPopupModal()) {
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ImGui::BringWindowToDisplayBehind(mode_window, modal);
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} else {
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ImGui::BringWindowToDisplayFront(mode_window);
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}
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const bool nav_mode =
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games::nost::touch_mode::current_mode() == games::nost::touch_mode::Mode::Nav;
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const char *label = nav_mode ? "Nav Mode" : "Piano Mode";
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// make the active routing mode recognizable without reading the label
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const auto &palette = nav_mode ? NAV_MODE_PALETTE : PIANO_MODE_PALETTE;
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ImGui::PushStyleColor(ImGuiCol_Button, palette.normal);
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ImGui::PushStyleColor(ImGuiCol_ButtonHovered, palette.hovered);
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ImGui::PushStyleColor(ImGuiCol_ButtonActive, palette.active);
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ImGui::Button(label, overlay::apply_scaling_to_vector(BUTTON_WIDTH, BUTTON_HEIGHT));
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ImGui::PopStyleColor(3);
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const auto &io = ImGui::GetIO();
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RECT client_rect {};
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if (io.DisplaySize.x > 0.f && io.DisplaySize.y > 0.f &&
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GetClientRect(this->overlay->get_window(), &client_rect)) {
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// convert the rendered imgui rectangle into the client coordinates
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// used by hardware touch publication and piano-key mapping
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const auto item_min = ImGui::GetItemRectMin();
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const auto item_max = ImGui::GetItemRectMax();
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const auto client_width = client_rect.right - client_rect.left;
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const auto client_height = client_rect.bottom - client_rect.top;
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if (!nav_mode) {
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draw_piano_keys(
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io.DisplaySize,
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client_width,
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games::nost::touch_mode::piano_key_state());
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}
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RECT button_bounds {
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static_cast<LONG>(std::lround(item_min.x * client_width / io.DisplaySize.x)),
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static_cast<LONG>(std::lround(item_min.y * client_height / io.DisplaySize.y)),
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static_cast<LONG>(std::lround(item_max.x * client_width / io.DisplaySize.x)),
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static_cast<LONG>(std::lround(item_max.y * client_height / io.DisplaySize.y)),
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};
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games::nost::touch_mode::publish_button_bounds(
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this->overlay->get_window(), button_bounds);
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}
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}
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}
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