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Windows: Fix unintended window size changes when resizing windows close to main viewport edges.

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This commit is contained in:
Rokas Kupstys 2020-06-24 14:00:35 +03:00 committed by omar
parent 45a7cf47ab
commit 6b0cf2e6ae
2 changed files with 14 additions and 6 deletions
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1
docs/CHANGELOG.txt
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@ -57,6 +57,7 @@ Other Changes:
Set to an intermediary value to toggle behavior based on width (same as Firefox).
- Tab: Added a ImGuiTabItemFlags_NoTooltip flag to disable the tooltip for individual tab item
(vs ImGuiTabBarFlags_NoTooltip for entire tab bar). [@Xipiryon]
- Windows: Fix unintended feedback loops when resizing windows close to main viewport edges. [@rokups]
- Popups: All functions capable of opening popups (OpenPopup*, BeginPopupContext*) now take a new
ImGuiPopupFlags sets of flags instead of a mouse button index. The API is automatically backward
compatible as ImGuiPopupFlags is guaranteed to hold mouse button index in the lower bits.

7
imgui.cpp
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@ -5071,6 +5071,9 @@ static bool ImGui::UpdateWindowManualResize(ImGuiWindow* window, const ImVec2& s
// Resize from any of the four corners
// We don't use an incremental MouseDelta but rather compute an absolute target size based on mouse position
ImVec2 corner_target = g.IO.MousePos - g.ActiveIdClickOffset + ImLerp(grip.InnerDir * grip_hover_outer_size, grip.InnerDir * -grip_hover_inner_size, grip.CornerPosN); // Corner of the window corresponding to our corner grip
ImVec2 clamp_min = ImVec2(grip.CornerPosN.x == 1 ? g.Style.DisplayWindowPadding.x : -FLT_MAX, grip.CornerPosN.y == 1 ? g.Style.DisplayWindowPadding.y : -FLT_MAX);
ImVec2 clamp_max = ImVec2(grip.CornerPosN.x == 0 ? g.IO.DisplaySize.x - g.Style.DisplayWindowPadding.x : FLT_MAX, grip.CornerPosN.y == 0 ? g.IO.DisplaySize.y - g.Style.DisplayWindowPadding.y : FLT_MAX);
corner_target = ImClamp(corner_target, clamp_min, clamp_max);
CalcResizePosSizeFromAnyCorner(window, corner_target, grip.CornerPosN, &pos_target, &size_target);
}
if (resize_grip_n == 0 || held || hovered)
@ -5096,6 +5099,9 @@ static bool ImGui::UpdateWindowManualResize(ImGuiWindow* window, const ImVec2& s
if (border_n == 1) { border_posn = ImVec2(1, 0); border_target.x = (g.IO.MousePos.x - g.ActiveIdClickOffset.x + WINDOWS_RESIZE_FROM_EDGES_HALF_THICKNESS); } // Right
if (border_n == 2) { border_posn = ImVec2(0, 1); border_target.y = (g.IO.MousePos.y - g.ActiveIdClickOffset.y + WINDOWS_RESIZE_FROM_EDGES_HALF_THICKNESS); } // Bottom
if (border_n == 3) { border_posn = ImVec2(0, 0); border_target.x = (g.IO.MousePos.x - g.ActiveIdClickOffset.x + WINDOWS_RESIZE_FROM_EDGES_HALF_THICKNESS); } // Left
ImVec2 clamp_min = ImVec2(border_n == 1 ? g.Style.DisplayWindowPadding.x : -FLT_MAX, border_n == 2 ? g.Style.DisplayWindowPadding.y : -FLT_MAX);
ImVec2 clamp_max = ImVec2(border_n == 3 ? g.IO.DisplaySize.x - g.Style.DisplayWindowPadding.x : FLT_MAX, border_n == 0 ? g.IO.DisplaySize.y - g.Style.DisplayWindowPadding.y : FLT_MAX);
border_target = ImClamp(border_target, clamp_min, clamp_max);
CalcResizePosSizeFromAnyCorner(window, border_target, border_posn, &pos_target, &size_target);
}
}
@ -5117,6 +5123,7 @@ static bool ImGui::UpdateWindowManualResize(ImGuiWindow* window, const ImVec2& s
{
const float NAV_RESIZE_SPEED = 600.0f;
nav_resize_delta *= ImFloor(NAV_RESIZE_SPEED * g.IO.DeltaTime * ImMin(g.IO.DisplayFramebufferScale.x, g.IO.DisplayFramebufferScale.y));
nav_resize_delta = ImClamp(nav_resize_delta, g.Style.DisplayWindowPadding - window->Pos - window->Size, ImVec2(FLT_MAX, FLT_MAX));
g.NavWindowingToggleLayer = false;
g.NavDisableMouseHover = true;
resize_grip_col[0] = GetColorU32(ImGuiCol_ResizeGripActive);