Initial work on prompt widget
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189
Source/Integration/PromptWidget.cpp
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189
Source/Integration/PromptWidget.cpp
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#include "PromptWidget.h"
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#include "PlayerControllerBase.h"
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#include "Widgets/SOverlay.h"
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#include "Widgets/Images/SImage.h"
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#include "Widgets/Text/STextBlock.h"
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#include "Widgets/Layout/SScaleBox.h"
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//
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// Atlas contents:
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//
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// Row 1: Keyboard Button no Glyph, Left Mouse, Middle Mouse, Right Mouse
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// Row 2: Left Trigger, Right Trigger, Left Shoulder, Right Shoulder
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// Row 3: XBFace Down, XBFace Left, XBFace Up, XBFace Right
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// Row 4: PSFace Down, PSFace Left, PSFace Up, PSFace Right
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// Row 5: Arrow Down, Arrow Left, Arrow Up, Arrow Right
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// Row 6: DPad Down, DPad Left, DPad Up, DPad Right
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// Row 7: Space Bar, unused, unused, unused
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// Row 8: unused, unused, unused, unused.
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void UlxPromptWidget::CalcAppearance(int32& OutIcon, FString& OutGlyph) const
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{
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UWorld* World = GetWorld();
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APlayerController* PC = World ? World->GetFirstPlayerController() : nullptr;
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AlxPlayerControllerBase* LPC = Cast<AlxPlayerControllerBase>(PC);
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ElxInputMode Mode = LPC ? LPC->CurrentInputMode : ElxInputMode::KeyboardMouse;
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if (Mode == ElxInputMode::KeyboardMouse)
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{
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CalcKeyboardAppearance(OutIcon, OutGlyph);
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}
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else
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{
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CalcGamepadAppearance(Mode, OutIcon, OutGlyph);
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}
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}
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void UlxPromptWidget::CalcKeyboardAppearance(int32& OutIcon, FString& OutGlyph) const
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{
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// Fixed-icon keys: no glyph needed.
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if (KeyboardKey == EKeys::LeftMouseButton) { OutIcon = 1; OutGlyph = TEXT(""); return; }
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if (KeyboardKey == EKeys::MiddleMouseButton) { OutIcon = 2; OutGlyph = TEXT(""); return; }
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if (KeyboardKey == EKeys::RightMouseButton) { OutIcon = 3; OutGlyph = TEXT(""); return; }
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if (KeyboardKey == EKeys::SpaceBar) { OutIcon = 24; OutGlyph = TEXT(""); return; }
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if (KeyboardKey == EKeys::Down) { OutIcon = 16; OutGlyph = TEXT(""); return; }
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if (KeyboardKey == EKeys::Left) { OutIcon = 17; OutGlyph = TEXT(""); return; }
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if (KeyboardKey == EKeys::Up) { OutIcon = 18; OutGlyph = TEXT(""); return; }
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if (KeyboardKey == EKeys::Right) { OutIcon = 19; OutGlyph = TEXT(""); return; }
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// Generic keyboard key: blank icon with the key name as glyph.
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OutIcon = 0;
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OutGlyph = KeyboardKey.GetDisplayName().ToString();
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}
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void UlxPromptWidget::CalcGamepadAppearance(ElxInputMode Mode, int32& OutIcon, FString& OutGlyph) const
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{
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OutGlyph = TEXT("");
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// Triggers and shoulders.
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if (GamepadKey == EKeys::Gamepad_LeftTrigger) { OutIcon = 4; return; }
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if (GamepadKey == EKeys::Gamepad_RightTrigger) { OutIcon = 5; return; }
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if (GamepadKey == EKeys::Gamepad_LeftShoulder) { OutIcon = 6; return; }
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if (GamepadKey == EKeys::Gamepad_RightShoulder) { OutIcon = 7; return; }
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// Face buttons — Xbox vs PlayStation.
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bool bPS = (Mode == ElxInputMode::PlayStationGamepad);
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if (GamepadKey == EKeys::Gamepad_FaceButton_Bottom) { OutIcon = bPS ? 12 : 8; return; }
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if (GamepadKey == EKeys::Gamepad_FaceButton_Left) { OutIcon = bPS ? 13 : 9; return; }
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if (GamepadKey == EKeys::Gamepad_FaceButton_Top) { OutIcon = bPS ? 14 : 10; return; }
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if (GamepadKey == EKeys::Gamepad_FaceButton_Right) { OutIcon = bPS ? 15 : 11; return; }
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// DPad.
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if (GamepadKey == EKeys::Gamepad_DPad_Down) { OutIcon = 20; return; }
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if (GamepadKey == EKeys::Gamepad_DPad_Left) { OutIcon = 21; return; }
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if (GamepadKey == EKeys::Gamepad_DPad_Up) { OutIcon = 22; return; }
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if (GamepadKey == EKeys::Gamepad_DPad_Right) { OutIcon = 23; return; }
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// Fallback: blank key with name.
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OutIcon = 0;
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OutGlyph = GamepadKey.GetDisplayName().ToString();
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}
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FBox2f UlxPromptWidget::GetIconUVs(int32 IconIndex)
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{
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const float ColWidth = 1.0f / 4.0f;
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const float RowHeight = 1.0f / 8.0f;
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float U = (IconIndex % 4) * ColWidth;
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float V = (IconIndex / 4) * RowHeight;
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return FBox2f(FVector2f(U, V), FVector2f(U + ColWidth, V + RowHeight));
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}
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FMargin UlxPromptWidget::GetScaledMargins() const
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{
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return FMargin(
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GlyphMargins.Left * Size.X,
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GlyphMargins.Top * Size.Y,
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GlyphMargins.Right * Size.X,
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GlyphMargins.Bottom * Size.Y);
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}
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void UlxPromptWidget::SynchronizeProperties()
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{
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Super::SynchronizeProperties();
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if (!MyImage.IsValid()) return;
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int32 Icon = 0;
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FString Glyph;
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CalcAppearance(Icon, Glyph);
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MyBrush.SetUVRegion(GetIconUVs(Icon));
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MyImage->InvalidateImage();
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MyImage->SetDesiredSizeOverride(Size);
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MyGlyphSlot->SetPadding(GetScaledMargins());
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MyGlyph->SetColorAndOpacity(GlyphColor);
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if (!Glyph.IsEmpty())
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{
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MyGlyph->SetText(FText::FromString(Glyph));
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MyGlyph->SetVisibility(EVisibility::HitTestInvisible);
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}
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else
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{
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MyGlyph->SetVisibility(EVisibility::Collapsed);
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}
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}
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void UlxPromptWidget::SetSize(FVector2D InSize)
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{
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Size = InSize;
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SynchronizeProperties();
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}
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void UlxPromptWidget::SetGlyphMargins(FMargin InMargins)
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{
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GlyphMargins = InMargins;
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SynchronizeProperties();
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}
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void UlxPromptWidget::SetGlyphColor(FLinearColor InColor)
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{
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GlyphColor = InColor;
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SynchronizeProperties();
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}
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void UlxPromptWidget::SetKeys(FKey InGamepadKey, FKey InKeyboardKey)
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{
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GamepadKey = InGamepadKey;
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KeyboardKey = InKeyboardKey;
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SynchronizeProperties();
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}
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TSharedRef<SWidget> UlxPromptWidget::RebuildWidget()
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{
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int32 Icon = 0;
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FString Glyph;
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CalcAppearance(Icon, Glyph);
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MyBrush.SetResourceObject(ButtonAtlas);
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MyBrush.ImageSize = Size;
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MyBrush.SetUVRegion(GetIconUVs(Icon));
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SAssignNew(MyImage, SImage).Image(&MyBrush);
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EVisibility GlyphVisibility = Glyph.IsEmpty() ? EVisibility::Collapsed : EVisibility::HitTestInvisible;
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SAssignNew(MyGlyph, STextBlock)
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.Text(FText::FromString(Glyph))
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.ColorAndOpacity(GlyphColor)
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.Visibility(GlyphVisibility);
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SAssignNew(MyScaleBox, SScaleBox)
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.Stretch(EStretch::ScaleToFit)
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[ MyGlyph.ToSharedRef() ];
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MyOverlay = SNew(SOverlay)
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+ SOverlay::Slot() [ MyImage.ToSharedRef() ];
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MyOverlay->AddSlot().Padding(GetScaledMargins()).HAlign(HAlign_Fill).VAlign(VAlign_Fill).Expose(MyGlyphSlot)
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[ MyScaleBox.ToSharedRef() ];
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return MyOverlay.ToSharedRef();
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}
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void UlxPromptWidget::ReleaseSlateResources(bool bReleaseChildren)
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{
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Super::ReleaseSlateResources(bReleaseChildren);
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MyOverlay.Reset();
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MyImage.Reset();
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MyScaleBox.Reset();
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MyGlyph.Reset();
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MyGlyphSlot = nullptr;
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}
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