mirror of
https://github.com/JetSetIlly/Gopher2600.git
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90c3f3f46b
imguiSelection type introduced in the previous commit to help with the tracker. the previous multiline selction method used for the source window was therefore made obsolete
62 lines
1.5 KiB
Go
62 lines
1.5 KiB
Go
// This file is part of Gopher2600.
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//
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// Gopher2600 is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Gopher2600 is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Gopher2600. If not, see <https://www.gnu.org/licenses/>.
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package sdlimgui
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// imguiSelection is useful helper for multiline selection
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//
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// use limits() to get start and end points of the selection and the inRange()
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// function for checking if a value is within the selection limits
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type imguiSelection struct {
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a int
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b int
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}
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func (sel *imguiSelection) clear() {
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sel.a = -1
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sel.b = -1
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}
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func (sel *imguiSelection) dragStart(i int) {
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sel.a = i
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sel.b = i
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}
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func (sel *imguiSelection) drag(i int) {
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sel.b = i
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}
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// single() is functionally the same as dragStart()
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func (sel *imguiSelection) single(i int) {
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sel.dragStart(i)
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}
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func (sel imguiSelection) isSingle() bool {
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return sel.a == sel.b
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}
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func (sel imguiSelection) inRange(i int) bool {
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if sel.b < sel.a {
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return i >= sel.b && i <= sel.a
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}
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return i >= sel.a && i <= sel.b
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}
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func (sel imguiSelection) limits() (int, int) {
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if sel.a < sel.b {
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return sel.a, sel.b
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}
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return sel.b, sel.a
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}
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