Drezil/imgui
1
0
Fork 0
mirror of https://github.com/Drezil/imgui.git synced 2025-07-04 12:08:47 +02:00
Code Issues Packages Projects Releases Wiki Activity

Added GetScrollX(), GetScrollX(), GetScrollMaxX() apis + demo (#246)

Browse Source
This commit is contained in:
ocornut
2015-08-30 18:33:38 +01:00
parent 7a31030978
commit 71026d3655
4 changed files with 53 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

50
imgui.cpp
View File

@ -1475,8 +1475,8 @@ ImGuiWindow::ImGuiWindow(const char* name)
SizeContents = SizeContentsExplicit = ImVec2(0.0f, 0.0f);
WindowPadding = ImVec2(0.0f, 0.0f);
Scroll = ImVec2(0.0f, 0.0f);
ScrollTargetRelY = FLT_MAX;
ScrollTargetCenterRatioY = 0.5f;
ScrollTarget = ImVec2(FLT_MAX, FLT_MAX);
ScrollTargetCenterRatio = ImVec2(0.5f, 0.5f);
ScrollbarX = ScrollbarY = false;
ScrollbarSizes = ImVec2(0.0f, 0.0f);
Active = WasActive = false;
@ -3730,11 +3730,16 @@ bool ImGui::Begin(const char* name, bool* p_opened, const ImVec2& size_on_first_
window->FocusIdxAllRequestNext = window->FocusIdxTabRequestNext = IM_INT_MAX;
// Apply scrolling
if (window->ScrollTargetRelY < FLT_MAX)
if (window->ScrollTarget.x < FLT_MAX)
{
float center_ratio_y = window->ScrollTargetCenterRatioY;
window->Scroll.y = window->ScrollTargetRelY - ((1.0f - center_ratio_y) * window->TitleBarHeight()) - (center_ratio_y * window->SizeFull.y);
window->ScrollTargetRelY = FLT_MAX;
window->Scroll.x = window->ScrollTarget.x;
window->ScrollTarget.x = FLT_MAX;
}
if (window->ScrollTarget.y < FLT_MAX)
{
float center_ratio = window->ScrollTargetCenterRatio.y;
window->Scroll.y = window->ScrollTarget.y - ((1.0f - center_ratio) * window->TitleBarHeight()) - (center_ratio * window->SizeFull.y);
window->ScrollTarget.y = FLT_MAX;
}
window->Scroll = ImMax(window->Scroll, ImVec2(0.0f, 0.0f));
if (!window->Collapsed && !window->SkipItems)
@ -4738,23 +4743,40 @@ void ImGui::SetCursorScreenPos(const ImVec2& screen_pos)
window->DC.CursorPos = screen_pos;
}
float ImGui::GetScrollX()
{
return GImGui->CurrentWindow->Scroll.x;
}
float ImGui::GetScrollY()
{
return GImGui->CurrentWindow->Scroll.y;
}
float ImGui::GetScrollMaxX()
{
ImGuiWindow* window = GetCurrentWindowRead();
return window->Scroll.y;
return window->SizeContents.x - window->SizeFull.x - window->ScrollbarSizes.x;
}
float ImGui::GetScrollMaxY()
{
ImGuiWindow* window = GetCurrentWindowRead();
return window->SizeContents.y - window->SizeFull.y;
return window->SizeContents.y - window->SizeFull.y - window->ScrollbarSizes.y;
}
void ImGui::SetScrollX(float scroll_x)
{
ImGuiWindow* window = GetCurrentWindow();
window->ScrollTarget.x = scroll_x;
window->ScrollTargetCenterRatio.x = 0.0f;
}
void ImGui::SetScrollY(float scroll_y)
{
ImGuiWindow* window = GetCurrentWindow();
window->ScrollTargetRelY = scroll_y + window->TitleBarHeight(); // title bar height cancelled out when using ScrollTargetRelY
window->ScrollTargetCenterRatioY = 0.0f;
window->ScrollTarget.y = scroll_y + window->TitleBarHeight(); // title bar height canceled out when using ScrollTargetRelY
window->ScrollTargetCenterRatio.y = 0.0f;
}
void ImGui::SetScrollFromPosY(float pos_y, float center_y_ratio)
@ -4762,10 +4784,10 @@ void ImGui::SetScrollFromPosY(float pos_y, float center_y_ratio)
// We store a target position so centering can occur on the next frame when we are guaranteed to have a known window size
ImGuiWindow* window = GetCurrentWindow();
IM_ASSERT(center_y_ratio >= 0.0f && center_y_ratio <= 1.0f);
window->ScrollTargetRelY = (float)(int)(pos_y + window->Scroll.y);
if (center_y_ratio <= 0.0f && window->ScrollTargetRelY <= window->WindowPadding.y) // Minor hack to make "scroll to top" take account of WindowPadding, else it would scroll to (WindowPadding.y - ItemSpacing.y)
window->ScrollTargetRelY = 0.0f;
window->ScrollTargetCenterRatioY = center_y_ratio;
window->ScrollTarget.y = (float)(int)(pos_y + window->Scroll.y);
if (center_y_ratio <= 0.0f && window->ScrollTarget.y <= window->WindowPadding.y) // Minor hack to make "scroll to top" take account of WindowPadding, else it would scroll to (WindowPadding.y - ItemSpacing.y)
window->ScrollTarget.y = 0.0f;
window->ScrollTargetCenterRatio.y = center_y_ratio;
}
// center_y_ratio: 0.0f top of last item, 0.5f vertical center of last item, 1.0f bottom of last item.