357 lines
9.1 KiB
C
357 lines
9.1 KiB
C
#include "Dengine/Ui.h"
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#include "Dengine/AssetManager.h"
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#include "Dengine/Assets.h"
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#include "Dengine/Asteroid.h"
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#include "Dengine/Debug.h"
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#include "Dengine/Renderer.h"
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void ui_beginState(UiState *state) { state->hotItem = 0; }
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void ui_endState(UiState *state, InputBuffer *input)
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{
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if (!common_isSet(input->keys[keycode_mouseLeft].flags,
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keystateflag_ended_down))
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{
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state->activeItem = 0;
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}
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else if (state->activeItem == 0)
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{
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state->activeItem = -1;
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}
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if (state->keyEntered == keycode_tab) state->kbdItem = 0;
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state->keyEntered = keycode_null;
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state->keyChar = keycode_null;
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}
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i32 ui_button(UiState *const uiState, MemoryArena_ *const arena,
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AssetManager *const assetManager, Renderer *const renderer,
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Font *const font, const InputBuffer input, const i32 id,
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const Rect rect, const char *const label, i32 zDepth)
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{
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if (math_rectContainsP(rect, input.mouseP))
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{
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uiState->hotItem = id;
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if (uiState->activeItem == 0)
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{
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if (common_isSet(input.keys[keycode_mouseLeft].flags,
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keystateflag_ended_down))
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{
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uiState->activeItem = id;
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}
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}
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}
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#if 0
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// Draw shadow
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renderer_staticRect(renderer, v2_add(V2(1, 1), rect.min), rect.size,
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V2(0, 0), 0, renderTex, V4(0, 0, 0, 1));
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#endif
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v2 buttonOffset = V2(0, 0);
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v4 buttonColor = V4(0, 0, 0, 1);
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if (uiState->hotItem == id)
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{
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if (uiState->activeItem == id)
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{
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buttonOffset = V2(1, 1);
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buttonColor = V4(0.8f, 0.8f, 0.8f, 1);
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}
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else
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{
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// NOTE(doyle): Hover effect
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buttonColor = V4(0.05f, 0.05f, 0.05f, 1);
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}
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}
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/* If no widget has keyboard focus, take it */
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if (uiState->kbdItem == 0) uiState->kbdItem = id;
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v2 rectSize = math_rectGetSize(rect);
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/* If we have keyboard focus, show it */
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if (uiState->kbdItem == id)
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{
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// Draw outline
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renderer_rectFixed(renderer,
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v2_add(V2(-2, -2), v2_add(buttonOffset, rect.min)),
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v2_add(V2(4, 4), rectSize), V2(0, 0), 0, NULL,
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buttonColor, zDepth, renderflag_no_texture);
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}
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renderer_rectFixed(renderer, v2_add(buttonOffset, rect.min), rectSize,
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V2(0, 0), 0, NULL, buttonColor, zDepth,
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renderflag_no_texture);
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if (label)
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{
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v2 labelDim = asset_fontStringDimInPixels(font, label);
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v2 labelPos = rect.min;
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// Initially position the label to half the width of the button
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labelPos.x += (rectSize.w * 0.5f);
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// Move the label pos back half the length of the string (i.e.
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// center it)
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labelPos.x -= (CAST(f32) labelDim.w * 0.5f);
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if (labelDim.h < rectSize.h)
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{
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labelPos.y += (rectSize.h * 0.5f);
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labelPos.y -= (CAST(f32) labelDim.h * 0.5f);
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}
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// TODO(doyle): We're using odd colors to overcome z-sorting by forcing
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// button text into another render group
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labelPos = v2_add(labelPos, buttonOffset);
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renderer_stringFixed(renderer, arena, font, label, labelPos, V2(0, 0),
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0, V4(0.9f, 0.9f, 0.9f, 0.9f), zDepth, 0);
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}
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// After renderering before click check, see if we need to process keys
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if (uiState->kbdItem == id)
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{
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switch (uiState->keyEntered)
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{
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case keycode_tab:
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// Set focus to nothing and let next widget get focus
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uiState->kbdItem = 0;
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if (uiState->keyMod == keycode_leftShift)
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uiState->kbdItem = uiState->lastWidget;
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// Clear key state so next widget doesn't auto grab
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uiState->keyEntered = keycode_null;
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break;
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case keycode_enter:
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return 1;
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default:
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break;
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}
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}
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uiState->lastWidget = id;
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// If button is hot and active, but mouse button is not
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// down, the user must have clicked the button.
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if (!common_isSet(input.keys[keycode_mouseLeft].flags,
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keystateflag_ended_down) &&
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uiState->hotItem == id && uiState->activeItem == id)
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{
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return id;
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}
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return 0;
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}
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i32 ui_scrollbar(UiState *const uiState, AssetManager *const assetManager,
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Renderer *const renderer, const InputBuffer input,
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const i32 id, const Rect scrollBarRect, i32 *const value,
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const i32 maxValue, i32 zDepth)
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{
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#ifdef DENGINE_DEBUG
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ASSERT(*value <= maxValue);
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#endif
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if (math_rectContainsP(scrollBarRect, input.mouseP))
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{
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uiState->hotItem = id;
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if (uiState->activeItem == 0)
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{
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if (common_isSet(input.keys[keycode_mouseLeft].flags,
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keystateflag_ended_down))
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{
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uiState->activeItem = id;
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}
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}
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}
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RenderTex renderTex = renderer_createNullRenderTex(assetManager);
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/* If no widget has keyboard focus, take it */
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if (uiState->kbdItem == 0) uiState->kbdItem = id;
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v2 rectSize = math_rectGetSize(scrollBarRect);
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/* If we have keyboard focus, show it */
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if (uiState->kbdItem == id)
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{
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// Draw outline
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renderer_rectFixed(renderer, v2_add(V2(-2, -2), scrollBarRect.min),
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v2_add(V2(4, 4), rectSize), V2(0, 0), 0, &renderTex,
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V4(1, 0, 0, 1), zDepth, 0);
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}
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// Render scroll bar background
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renderer_rectFixed(renderer, scrollBarRect.min, rectSize, V2(0, 0), 0,
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&renderTex, V4(0.75f, 0.5f, 0.5f, 1), zDepth, 0);
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// Render scroll bar slider
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v2 sliderSize = V2(16, 16);
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v4 sliderColor = V4(0, 0, 0, 1);
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f32 sliderPercentageOffset = (CAST(f32) * value / CAST(f32) maxValue);
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f32 sliderYOffsetToBar =
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(rectSize.h - sliderSize.h) * sliderPercentageOffset;
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v2 sliderPos = v2_add(scrollBarRect.min, V2(0, sliderYOffsetToBar));
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if (uiState->hotItem == id || uiState->activeItem == id)
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sliderColor = V4(1.0f, 0, 0, 1);
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else
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sliderColor = V4(0.0f, 1.0f, 0, 1);
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renderer_rectFixed(renderer, sliderPos, sliderSize, V2(0, 0), 0, &renderTex,
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sliderColor, zDepth, 0);
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if (uiState->kbdItem == id)
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{
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switch (uiState->keyEntered)
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{
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case keycode_tab:
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uiState->kbdItem = 0;
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if (uiState->keyMod == keycode_leftShift)
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uiState->kbdItem = uiState->lastWidget;
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// Clear key state so next widget doesn't auto grab
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uiState->keyEntered = keycode_null;
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break;
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case keycode_up:
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// TODO(doyle): Fix input for this to work, i.e. proper rate limited
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// input poll
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if (*value < maxValue)
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{
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(*value)++;
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return id;
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}
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case keycode_down:
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if (*value > 0)
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{
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(*value)--;
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return id;
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}
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default:
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break;
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}
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}
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uiState->lastWidget = id;
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if (uiState->activeItem == id)
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{
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f32 mouseYRelToRect = input.mouseP.y - scrollBarRect.min.y;
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// Bounds check
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if (mouseYRelToRect < 0)
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mouseYRelToRect = 0;
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else if (mouseYRelToRect > rectSize.h)
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mouseYRelToRect = rectSize.h;
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f32 newSliderPercentOffset = (CAST(f32) mouseYRelToRect / rectSize.h);
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i32 newValue = CAST(i32)(newSliderPercentOffset * CAST(f32) maxValue);
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if (newValue != *value)
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{
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*value = newValue;
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return id;
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}
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}
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return 0;
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}
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i32 ui_textfield(UiState *const uiState, MemoryArena_ *const arena,
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AssetManager *const assetManager, Renderer *const renderer,
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Font *const font, InputBuffer input, const i32 id,
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const Rect rect, char *const string, i32 zDepth)
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{
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i32 strLen = common_strlen(string);
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b32 changed = FALSE;
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if (math_rectContainsP(rect, input.mouseP))
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{
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uiState->hotItem = id;
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if (uiState->activeItem == 0)
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{
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if (common_isSet(input.keys[keycode_mouseLeft].flags,
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keystateflag_ended_down))
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{
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uiState->activeItem = id;
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}
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}
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}
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/* If no widget has keyboard focus, take it */
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if (uiState->kbdItem == 0) uiState->kbdItem = id;
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v2 rectSize = math_rectGetSize(rect);
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/* If we have keyboard focus, show it */
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if (uiState->kbdItem == id)
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{
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// Draw outline
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renderer_rectFixed(renderer, v2_add(V2(-2, -2), rect.min),
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v2_add(V2(4, 4), rectSize), V2(0, 0), 0, NULL,
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V4(1.0f, 0, 0, 1), zDepth, 0);
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}
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// Render text field
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renderer_rectFixed(renderer, rect.min, rectSize, V2(0, 0), 0, NULL,
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V4(0.75f, 0.5f, 0.5f, 1), zDepth, 0);
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if (uiState->activeItem == id || uiState->hotItem == id)
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{
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renderer_rectFixed(renderer, rect.min, rectSize, V2(0, 0), 0, NULL,
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V4(0.75f, 0.75f, 0.0f, 1), zDepth, 0);
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}
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else
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{
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renderer_rectFixed(renderer, rect.min, rectSize, V2(0, 0), 0, NULL,
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V4(0.5f, 0.5f, 0.5f, 1), zDepth, 0);
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}
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v2 strPos = rect.min;
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renderer_stringFixed(renderer, arena, font, string, strPos, V2(0, 0), 0,
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V4(0, 0, 0, 1), zDepth, 0);
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if (uiState->kbdItem == id)
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{
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switch (uiState->keyEntered)
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{
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case keycode_tab:
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uiState->kbdItem = 0;
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if (uiState->keyMod == keycode_leftShift)
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uiState->kbdItem = uiState->lastWidget;
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uiState->keyEntered = keycode_null;
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break;
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case keycode_backspace:
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if (strLen > 0)
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{
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string[--strLen] = 0;
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changed = TRUE;
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}
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break;
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default:
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break;
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}
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if (uiState->keyChar >= keycode_space &&
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uiState->keyChar <= keycode_tilda && strLen < 30)
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{
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string[strLen++] = uiState->keyChar + ' ';
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string[strLen] = 0;
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changed = TRUE;
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}
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}
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if (!common_isSet(input.keys[keycode_mouseLeft].flags,
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keystateflag_ended_down) &&
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uiState->hotItem == id && uiState->activeItem == id)
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{
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uiState->kbdItem = id;
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}
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uiState->lastWidget = id;
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if (changed) return id;
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return 0;
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}
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