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Clean up scroll bar implementation

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This commit is contained in:
Doyle Thai 2016-08-10 18:23:19 +10:00
parent 2d7262aa22
commit 4127542d1d
1 changed files with 41 additions and 29 deletions
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70
src/WorldTraveller.c
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@ -929,12 +929,12 @@ INTERNAL i32 button(UiState *uiState, AssetManager *assetManager,
{
// Set focus to nothing and let next widget get focus
uiState->kbdItem = 0;
if (input->leftShift)
if (input.leftShift)
uiState->kbdItem = uiState->lastWidget;
// Clear key state so next widget doesn't auto grab
input->space = FALSE;
input->leftShift = FALSE;
input.space = FALSE;
input.leftShift = FALSE;
}
}
@ -951,48 +951,60 @@ INTERNAL i32 button(UiState *uiState, AssetManager *assetManager,
}
INTERNAL i32 scrollBar(UiState *uiState, AssetManager *assetManager,
Renderer *renderer, KeyInput input, i32 id, Rect rect,
i32 *value, i32 max)
Renderer *renderer, KeyInput input, i32 id,
Rect scrollBarRect, i32 *value, i32 maxValue)
{
i32 yPos = ((256 - 16) * (*value)) / max;
#ifdef DENGINE_DEBUG
ASSERT(*value <= maxValue);
#endif
Rect scrollRect;
scrollRect.pos = v2_add(rect.pos, V2i(8, 8));
scrollRect.size = V2(16, 255);
if (math_pointInRect(scrollRect, input.mouseP))
if (math_pointInRect(scrollBarRect, input.mouseP))
{
uiState->hotItem = id;
if (uiState->activeItem == 0 && input.mouseLeft)
uiState->activeItem = id;
}
v2 scrollBarSize = V2(32, 256 + 16);
RenderTex renderTex = renderer_createNullRenderTex(assetManager);
renderer_staticRect(renderer, rect.pos, scrollBarSize, V2(0, 0), 0,
renderTex, V4(0.5f, 0.5f, 0.5f, 1));
// Render scroll bar background
renderer_staticRect(renderer, scrollBarRect.pos, scrollBarRect.size,
V2(0, 0), 0, renderTex, V4(0.75f, 0.5f, 0.5f, 1));
// Render scroll bar slider
v2 sliderSize = V2(16, 16);
v4 sliderColor = V4(0, 0, 0, 1);
f32 sliderPercentageOffset = (CAST(f32) *value / CAST(f32) maxValue);
f32 sliderYOffsetToBar =
(scrollBarRect.size.h - sliderSize.h) * sliderPercentageOffset;
v2 sliderPos = v2_add(scrollBarRect.pos, V2(0, sliderYOffsetToBar));
if (uiState->hotItem == id || uiState->activeItem == id)
{
renderer_staticRect(renderer, v2_add(V2i(8, 8 + yPos), rect.pos),
V2(16, 16), V2(0, 0), 0, renderTex,
V4(1.0f, 0, 0, 1));
}
sliderColor = V4(1.0f, 0, 0, 1);
else
{
renderer_staticRect(renderer, v2_add(V2i(8, 8 + yPos), rect.pos),
V2(16, 16), V2(0, 0), 0, renderTex,
V4(0, 1.0f, 0, 1));
}
sliderColor = V4(0.0f, 1.0f, 0, 1);
renderer_staticRect(renderer, sliderPos, sliderSize, V2(0, 0), 0, renderTex,
sliderColor);
if (uiState->activeItem == id)
{
i32 mousePos = CAST(i32)(input.mouseP.y - (rect.pos.y + 8));
if (mousePos < 0) mousePos = 0;
if (mousePos > 255) mousePos = 255;
i32 v = (mousePos * max) / 255;
if (v != *value)
f32 mouseYRelToRect = input.mouseP.y - scrollBarRect.pos.y;
// Bounds check
if (mouseYRelToRect < 0)
mouseYRelToRect = 0;
else if (mouseYRelToRect > scrollBarRect.size.h)
mouseYRelToRect = scrollBarRect.size.h;
f32 newSliderPercentOffset =
(CAST(f32) mouseYRelToRect / scrollBarRect.size.h);
i32 newValue = CAST(i32)(newSliderPercentOffset * CAST(f32)maxValue);
if (newValue != *value)
{
*value = v;
*value = newValue;
return 1;
}
}